Walker MT User Manual

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OWNER’S MANUAL

Safety, Assembly, Operating, and Maintenance Instructions

Model MT (20.0 HP)

Model MTL (25.0 HP)

Model MTEFI (26.0 HP)

(Covers 2004 Production)

™

Please Read and Save These Instructions Effective Date: 01-01-04

For Safety, Read All Safety and Operation P/N 8000-9 Instructions Prior to Operating Machine Price $5.00

Foreword

Thank you. . .for purchasing a Walker mower. Every effort has been made to provide you with the most reliable mower on the market, and we are sure you will be among our many satisfied customers. If for any reason this product does not perform to your expectations, please contact us at (970) 221-5614. Every customer is important to us. Your satisfaction is our goal.

Please. . .rea d this manual thoroughl y! This manual is to be used in conjuncti on with the engine manufacturer’s manual for the specific engine on the mower model you have purchased. Before you operate your new mower, please read this entire manual. Some of the information is crucial for proper operation and maintenance of this mower - it will help protect your investment and ensure that the mower performs to your satisfaction. Some of the information is important to your safety and must be read and understood to help prevent possible injury to the operator or others. If anything in this manual is confusing or hard to understand, please call our service department, at (970) 221-5614, for clarification before operating or servicing this mower.

This manual cove rs M ode l MT wi th the Ko hle r Com man d CH2 0 ( 20 .0 H P) g aso li ne eng ine , or optional Kohler Command Pro CH26 (26.0 HP) Electronic Fuel Injection (EFI) gasoline engine, or optional Kohler Aegis LH685 (25.0 HP) gasoline engine (liquid cooled).

All shields and guards must be in place for the proper and safe operation of this machine. Where they are shown removed in this manual, it is for illustration purposes only. Do not operate this machine unless all shields and guards are in place.

Specifications given are based on the latest in format ion available at the time this manual was produced.

Walker Mfg. Co. is continually s tr iv ing to improve the desi gn and per for ma nc e of its prod uc ts. We reserve the righ t to m ake c hanges i n sp ecifi catio ns and de sign wi thout th ereby incu rring any obligation relative to previously manufactured products.

Sincerely, WALKER MANUFACTURING COMPANY

Bob Walker, President

General Information________________ 4

HIGHLIGHTED INFORMATION _____________ 4 GLOSSARY ____________________________ 4 IDENTIFYING NUMBER LOCATIONS________ 4 ENGINE SERIAL NUMBER LOCATION ______ 5 SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS ______________ 5

Specifications________________________ 6

ENGINE________________________________ 6 ELECTRICAL SYSTEM ___________________ 7 TRANSMISSION_________________________ 7 BLADE DRIVE __________________________ 8 TIRE SIZE______________________________ 8 TIRE PRESSURE ________________________ 8 DIMENSIONS (Tractor and Mower) _________ 8 MOWER DECK__________________________ 8 CURB WEIGHT__________________________ 9 DRIVE BELTS___________________________ 9 GHS SYSTEM (Optional)__________________ 9 SEAT_________________________________ 10 FRAME/BODY CONSTRUCTION __________ 10

Component Identification 11 Safety Instructions _______ 16

BEFORE OPERATING___________________ 16 OPERATING___________________________ 17 MAINTENANCE ________________________ 18 SAFETY, CONTROL AND INSTRUCTION DECALS _____________ 20

Assembly Instructions _____________ 22

SETUP INSTRUCTIONS _________________ 22

Tire Installation (Tractor)_______________ 22 Battery Service_______________________ 22

Wet Battery Service __________________ 22 Dry Battery Service __________________ 22 Battery Charging ____________________ 23 Battery Installation ___________________ 23

Mower Deck Assembly ________________ 24

Deck Caster Wheels Installation ________ 24 Deck Discharge Chute Installation ______ 24 Deck Discharge Shield Installation ______ 25 PTO Shaft Guard Installation __________ 25 Tilt-Up Roller Wheel Installation ________ 25

Mower Deck lnstallation on Tractor ______ 25

Deck Installation ____________________ 25 Deck Leveling ______________________ 27

PREOPERATING CHECKLIST ____________ 28

Operating Instructions_____________ 31

CONTROL IDENTIFICATION, LOCATION, AND FUNCTION _____________ 31

Operating Controls ___________________ 31

Engine Choke - (Model MT and MTL only) 31 Engine Throttle _____________________ 32 Forward Speed Control (FSC) _________ 32 Steering Levers _____________________ 32 Blade Clutch (PTO) __________________ 32 Parking Brake ______________________ 32 Front Body Latch Release ____________ 34 Transmission Lockout Levers __________ 34 Optional Cold Start Lever (Jackshaft Drive Belt Release) _________ 34

Instrument Panel _____________________ 35

Hourmeter _________________________ 36 Voltmeter _________________________ 36 Oil Pressure Warning Light ____________ 36 Over Temperature Warning Light (Model MT and MTEFI Only) __________ 36 Water Temperature Warning Light (Model MTL) _______________________ 36 Water Temperature Gauge (Model MTL) _36 Engine Service Light - Model MTEFI ____ 36 Ignition Switch ______________________ 37 Light Switch (For Optional Lights) _______ 37 Warning Horn ______________________ 37 Circuit Breakers ____________________ 37

STARTING THE ENGINE_________________ 38 ADJUSTING GROUND SPEED AND STEERING _________________ 39 ENGAGING THE MOWER________________ 40 STOPPING THE MACHINE _______________ 41 ADJUSTING CUTTING HEIGHT ___________ 42 TRANSMISSION LOCKOUT ______________ 42 RECOMMENDATIONS FOR MOWING ______ 43 RECOMMENDATIONS FOR TILT-UP DECK OPERATION/TRANSPORT_______________ 44 GRASS HANDLING SYSTEM (GHS) _______ 45

General Information __________________ 46 Clogging Checklist ___________________ 47 Using the Tilt-Up Deck ________________ 48 Using the GHS Catcher________________ 48

Powerfil “Full” Signal Horn ___________________ 48

Cleaning the GHS Exhaust Screen ______ 48 Dumping the Catcher _________________ 49

Tailgate Dumping ___________________ 49 Using the Dump Bag _________________ 49 Power Dump Option _________________ 50

_________________________ 48

Table of Contents

Maintenance Instructions__________ 52

MAINTENANCE SCHEDULE CHART _______ 52 IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE _______________ 53

Fuel System _________________________ 53 Starting/Stopping_____________________ 53 Cooling System - MT, MTEFI____________ 53 Cooling System - MTL _________________ 53 Air Cleaner System ___________________ 53 Oil _________________________________ 54

LUBRICATION _________________________ 54

Engine Oil ___________________________ 54

Engine Break-In Oil __________________ 54 Checking Engine Crankcase Oil Level ___ 54 Changing Engine Crankcase Oil/Oil Filter _55

Grease Fitting and Oil Point Lubrication__ 55 Mower Deck Gearbox Lubrication _______ 58 DSD52 or DSD62 Mower Deck Lubrication 58 Tractor PTO Gearbox Lubrication _______ 59

Checking Gearbox Oil Level ___________ 59 Changing Gearbox Oil ________________ 59

Gear Axle Lubrication _________________ 59 Hydrostatic Transmission Fluid_________ 60

Checking Hydrostatic Transmission Fluid Level ______________ 60 Changing Hydrostatic Transmission Fluid _60

CLEANING ____________________________ 61

Engine Air Cleaner System_____________ 61

Turbine Precleaner __________________ 62 Donaldson Radialseal™ Air Cleaner _____ 62

Engine Cooling System - MT20 and MTEFI 64

Air Intake System ___________________ 64 Cylinder Head Cooling Fins ____________ 64

Engine Cooling System - MTL __________ 64

Radiator Screen and Cooling Fins ______ 64 Flushing Radiator and Changing Coolant _65

Grass Buildup in Mower Housing________ 65 GHS Blower _________________________ 66 GHS Exhaust Screen__________________ 66 Hydrostatic Transmission Cooling Fins __ 67

CHECKING/SERVICING _________________ 67

Engine Cooling System - MTL __________ 67

Coolant Level ______________________ 67

Security of Air Filtration Components____ 68 Battery______________________________ 68

Electrolyte Level ____________________ 68 Cleaning the Terminals _______________ 69 Chargin g the Battery _________________ 69

Tire Pressure ________________________ 69 Wheel Bolt Torque ____________________ 69 Sharpen Mower Blades ________________ 69 Drive Belts __________________________ 70

Mower Deck Gearbox Oil Seals _________ 71 Spark Plugs _________________________ 71 Ignition Wires________________________ 71 Fuel Lines and Clamps ________________ 71 Radiator Hoses and Clamps - MTL ______ 71 Engine Starter _______________________ 71 Blade Brake Action ___________________ 71 PTO U-Joints ________________________ 71

REPLACING/REPAIRING ________________ 72

Drive Belts __________________________ 72

Engine PTO Drive Belt _______________ 73 Jackshaft Drive Belt _________________ 74 GHS Blower Drive Belt _______________ 75 Hydrostatic Ground Drive Belt _________ 76

Fuel Filter - Model MT and MTL _________ 77 Fuel Filter - MTEFI ____________________ 77 Blade Overload Shear Bolts ____________ 77 PTO Shear Pin _______________________ 78 Mower Blades _______________________ 78 Mower Deck Gearbox Replacement______ 79 GHS Blower Assembly ________________ 80

GHS Blower Assembly Removal _______ 80 Blower Wheel Removal ______________ 80 Blower Wheel Installation _____________ 81 GHS Blower Assembly Installation ______ 81

ADJUSTMENTS________________________ 82

Safety Switches ______________________ 82 Tail Wheel Bearing Preload ____________ 82 Steering Levers ______________________ 82 Blade Clutch (PTO) ___________________ 83

Clutch Engagement/Belt T ensio n _______ 83 Clutch Disengagement/B rake Action ____ 84 Stop Block Eccentric Adjustment _______ 85 Clutch Idler Pulley Travel Adjustment ____ 85 Blade Brake Band Adjustment _________ 85

Transmission Control _________________ 86

Set Forward Travel Limit (Stop) ________ 86 Steering Lever End Play Adjustment ____ 87 Neutral Function Adjustment __________ 87 Straight Ground Travel Adjustment _____ 88

Forward Speed Control Friction Lock ____ 88 Tilt-Up Deck Adjustable Stop ___________ 89 Carburetor - MT ______________________ 89

Engine Idle Adjustment _______________ 89

Carburetor - MTL _____________________ 90

Low Idle Speed (RPM) Adjustment ______ 90

GHS “Full” Signal Horn with Grass-Pak Adjustment (When Horn Sounds at Wrong Time)_____ 91

Switch _______________ 91

Table of Contents

ELECTRICAL SYSTEM __________________ 92

Circuit Breakers ______________________ 92 Wiring Diagram - Model MT_____________ 93 Wiring Diagram - Model MTEFI__________ 94 Wiring Diagram - Model MTL____________ 96

Warranty ___________________________ 97

General Information

HIGHLIGHTED INFORMATION

Walker Manufacturing recommends that any service requiring special training or tools be performed by an authorized Walker Mower Dealer. There are several general practices to be aware of in the area of safety. Most accidents associated with the operation or maintenance of a Walker Mower are caused by disregardi ng bas ic saf ety pr ecau tions or specific warnings. Such accidents, in most cases, can be prevented by being aware of the dangers present.

Information of special importance has been highlighted in bold type in this man ual. Refer to Safety

Instructions for the mean ing s of DANGE R, WARNING, CAUTION, IMPORTANT, and NOTE.

GLOSSARY

There are many ter ms th at are either unique to th is equipment or that ar e used as acronyms . The following terms and their definitions will help while using this manual:

• DECK is the mowing attachment mounted on

the front of the tractor which includes the carrier frame, deck housing, blade drive gearboxes, and cutter blades.

• ELECTRO NIC CONTROL U NIT (ECU) cont rols

engine functions such as spark timing, fue l/air ratio, etc.

• FORW ARD SPEED CONTROL (FSC) cont r ol s

the maximum forward speed of the tractor; functioning as a cruise control.

• GRASS HANDLING SYSTEM (GHS

mowed material and deposits it in the catcher.

• GRASS-PAK

grass delivery s pout (in the catcher) and act ivates the “full” signal horn when the grass catcher is full.



SWITCH is mounted on the



) collects

• LEFT HAND (LH) refers to the left-hand side of

the tractor when the oper ator is seated facing forward in the tractor seat.

• POWER TAKE-OFF (PTO) transmits engine

power to run the cutter blades and GHS blower.

• POWERFIL

throughout the interior of the gr ass catcher by an oscillating delivery spo ut.



spreads the mowed material

• RIGHT HAND (RH) refers to the right-hand side

of the tractor when the operator is seated facing forward in the tractor seat.

• SIDE DISCHARGE (SD) mows but does not

collect the mowed material.

• STEERING LEVERS steer the tractor by con-

trolling the dual hydrostatic transmissions.

• TRACTOR is the prime mo ver, including t he en-

gine, drive train, operator seat, and contr ols to operate the mower.

• TRANSMISSION LOCKOUT releases the hy-

drostatic transmissions to permit freewheeling the tractor.

IDENTIFYING NUMBER LOCATIONS

The tractor serial number plate is affixed to the tractor body just below the left rear corner of the seat. The mower deck serial number plate is affixed alongside the angle i ron framing on the RH side of the RH mower blade drive. Model and ser ial numbers are helpful when obtaining repl acement parts and maintenance assistance. For ready refer ence, please record these numbers in the space provided.

Tractor Model No. _______________________ Tractor Serial No. _______________________ Deck Serial No. _______________________

• GROUND DRIVE refers to the dual h yd rostatic

transmissions which drive the main wheels.

• HYDROSTATIC TRANSMISSION transmits

and controls power from the ground drive belt to the main drive wheel.

Engine Model No. _______________________ Engine Serial No. _______________________ Date of Purchase _______________________

Fill In By Purchaser

General Information

Serial Number

Tractor Serial Number Location

Serial Number

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCATION

Refer to the engine manu al that accompanies this manual for the location of the engine serial number. For the mower model(s) covered by this manual, an engine manual is a vailable c overing t he Kohler e ngines.

Engine Serial Number Location (MTL)

SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS

The detailed servicing and repair of the engine, hydrostatic transmission, and gearboxes are not covered in this manual. Only routine maintenance and general service instructions are provided. F or the service of these components during the limited warranty period, it is important to find a local, authorized servicing agent of the component manufacturer. Any unauthorized work don e on these components during the warranty period may void the warranty. If you have any difficulty finding an authorized outlet or obtaining warranty service, please contact our Service Department for assistance:

Walker Manufacturing Company

5925 E. Harmony Road

Fort Collins, CO 80528

1-970-221-5614

Service manuals are available for each of these components from their respective manufacturers as follows:

Serial Number

Engine Serial Number Location

(MT20 and MTEFI)

Kohler Engines Kohler Company

Kohler, WI 53044

Hydrostatic Eaton Corporation Transmissions 15151 Highway 5

Eden Prairie, MN 55344

Gearboxes (Deck) Tecumseh Products Co.

900 North Street Grafton, Wl 53024

Specifications

MODEL

AIR COOLED MT (20.0 HP)

LIQUID COOLED MTL (25.0 HP)

MTEFI (26.0 HP)

ENGINE

Manufacturer/Model Kohler Command CH20,

2 Cyl., Gasoline (Air Cooled)



Kohler Command Pro CH26, 2 Cyl., Gasoline (Air Cooled), Electronic Fuel Injection (EFI)

Displacement CH20 38.1 cu. in. (624 cc) Displacement CH26 44.0 cu. in. (725 cc) Displacement LH685 41.1 cu. in. (674 cc)

HP (@ 3600 RPM) CH20 20.0 HP (@ 3600 RPM) CH26 26.0 HP (@ 3600 RPM) LH685 25.0

Max. RPM (No Load) 3750 3750 Governed RPM 3600 3600 Max. To rq ue [ft-lb (N

Idle RPM 1200 Spark Plug Type Champion Spark Plug Gap .030 in. (.76 mm) .030 in. (.76 mm) Crankcase Capacity CH20 2.1 qts (2.0 liters)

Crankcase Capacity CH26 2.1 qts (2.0 liters) Crankcase Capacity LH685 2.0 qts (1.9 liters)

Crankcase Lubricant API SG, SH, SJ or higher

Oil Filter 12 050 01 S 12 050 01 S Cooling System CH20 Air Cooled

Cooling System CH26 Air Cooled Cooling System LH685 Cooling System Capacity (Approx.) LH685

Coolant 50/50 Pre-Mix Anti-freeze/

Cooling Fan Electric radiator cooling fan

Fuel Tank Capacity 5 Gallons (19.0 liters) 5 Gallons (19.0 liters) Fuel Regular Grade Unleaded

⋅m) @ RPM]

CH20 32 (44.0) @ 2500 CH26 41.6 (56.4) @ 2700 LH685 35.9 (48.7) @ 2200

± 75 1200 ± 75



RC12YC Champion RC14YC

Grade Oil Only with 10W-30 Viscosity above 0° F (-18° C), or 5W-20 or 5W-30 Viscosity below 32° F (0° C)

Gasoline (87 Octane)

Kohler Aegis Gasoline (Liquid Cooled)

API SG, SH, SJ or higher Grade Oil Only with 10W-30 Viscosity above 0° F (-18° C), or 5W-20 or 5W-30 Viscosity below 32° F (0° C)

Liquid Cooled

1.25 Gallons (4.73 liters)

water

with reversible self-cleaning action

Regular Grade Unleaded Gasoline (87 Octane)

LH685, 2 Cyl.,

Specifications

MODEL

AIR COOLED MT (20.0 HP)

LIQUID COOLED MTL (25.0 HP)

MTEFI (26.0 HP)

ELECTRICAL SYSTEM

Battery 12 Volt, 35AH, 295 CCA 12 Volt, 35AH, 295 CCA Charging System Flywheel Alternator Flywheel Alternator Charging Output 15 Amp DC (Regulated) 25 Amp DC (Regulated) System Polarity Negative Ground Negative Ground Ignition Electronic Capacitive

Discharge

Starter 12 Volt Electric Ring-Gear

Type, Solenoid Shift

Interlock Switch Ignition Lockout by Seat

Switch, T ransmis sion Neutra l and Blade Clutch

Circuit Breaker Manual Reset (30A) Manual Reset (30A)

TRANSMISSION

Manufacturer/Model Dual Hydrostatic, Eaton

Model 7, Each Wheel Independently Driven

Steering Hand Lever Control /

Individual Wheel

Forward Speed Control Precision Friction Lock Lever,

Cruise Control, with Neutral-Park Position

Electronic Capacitive Discharge

12 Volt Electric Ring-Gear Type, Solenoid Shift

Ignition Lockout by Seat Switch, Transmission Neutral and Blade Clutch

Dual Hydrostatic, Eaton Model 7, Each Wheel Independently Driven

Hand Lever Control / Individual Wheel

Precision Friction Lock Lever, Cruise Control, with Neutral-Park Position

Service Brake Dynamic Braking through

Hydrostatic Transmission

Parking Brake Mechanical Pin Lock in

Transmission Gear

Neutral Transmission Release by

Manual Dump Valve

Final Drive Gear Drive Axle Gear Drive Axle

Transmission Fluid

Factory Service Mobil 1 Synthetic Motor Oil

(15W50)

Alternate Transmission Fluid SAE 30W Straight Viscosity

Motor Oil Transmission Fluid Capacity 1 qt (1 liter) 1 qt (1 liter) Transmission Cooling Cooling Fan Mounted on

Drive Pulley

Ground Travel Speed

Forward m.p.h. (km/h) Reverse m.p.h. (km/h)

0-5 (0-8) Infinitely Variable*

0-5 (0-8) Infinitely Variable

* 6.5 m.p.h. with Optional Speed-Up Kit

Dynamic Braking through Hydrostatic Transmission

Mechanical Pin Lock in Transmission Gear

Transmission Release by Manual Dump Valve

Mobil 1 Synthetic Motor Oil (15W50)

SAE 30W Straight Viscosity Motor Oil

Cooling Fan Mounted on Drive Pulley

0-5 (0-8) Infinitely Variable* 0-5 (0-8) Infinitely Variable

Specifications

MODEL

AIR COOLED MT (20.0 HP)

LIQUID COOLED MTL (25.0 HP)

MTEFI (26.0 HP)

BLADE DRIVE

PTO Shaft Quick Disconnect Splined

Shaft with Two High-Speed U-Joints

Blade Spindle Each Blade (2) Mounts Direct

on Peerless Right Angle Gearbox with Tee Gearbox in Center Connected to PTO Shaft (Complete Geared Drive, Peerless Model 1000 Gearboxes)

Blade Drive Clutch and Brake Manual Belt Tightener Clutch

and Band Brake (Stops Blades within Five (5) Seconds of Disengagement)

Max. Blade Speed [22 in. (56 cm) Blade] @ 3600 RPM Engine

TIRE SIZE

Deck Caster Wheel 2.80/2.50-4 Pneumatic (4-Ply) 2.80/2.50-4 Pneumatic (4-Ply) Deck Caster Wheel (Optional) 8.25 x 2.75 Semi-Pneumatic 8.25 x 2.75 Semi-Pneumatic Drive 18 x 9.50-8 (4-Ply) 18 x 9.50-8 (4-Ply) Rear (Dual) 13 x 5.00-6 (4-Ply) 13 x 5.00-6 (4-Ply)

2900 RPM [16700 FPM (5090 m/min)]

Quick Disconnect Splined Shaft with Two High-Speed U-Joints

Each Blade (2) Mounts Direct on Peerless Right Angle Gearbox with Tee Gearbox in Center Connected to PTO Shaft (Complete Geared Drive, Peerless Model 1000 Gearboxes)

Manual Belt Tightener Clutch and Band Brake (Stops Blades within Five (5) Seconds of Disengagement)

2900 RPM [16700 FPM (5090 m/min)]

TIRE PRESSURE

Deck Caster Wheel 20 PSI (137 kPa) 20 PSI (137 kPa) Drive 15 PSI (103 kPa) 15 PSI (103 kPa) Rear 20 PSI (137 kPa) 20 PSI (137 kPa)

DIMENSIONS (Tractor and Mower)*

Length 91 in. (231 cm) 91 in. (231 cm) Width 49 in. (124 cm) 49 in. (124 cm) Height 44 in. (112 cm) 44 in. (112 cm) Wheel Base (Tractor) 42-1/4 in. (107 cm) 42-1/4 in. (107 cm) Tread Width (Tractor) 29-3/4 in. (76 cm) 29-3/4 in. (76 cm)

* See note under CURB WEIGHT

MOWER DECK

Width of Cut SD/GHS 42 or 48 in. (107 or 122 cm) 42 or 48 in. (107 or 122 cm) Cutting Height 1 to 4 in. (3 to 10 cm) 1 to 4 in. (3 to 10 cm) Height Adjustment 7 Positions - 1/2 in. (1 cm)

Increment Hitch Pins Installed in Multi-Position Deck Support

7 Positions - 1/2 in. (1 cm) Increment Hitch Pins Installed in Multi-Position Deck Support

Specifications

MODEL

AIR COOLED MT (20.0 HP)

LIQUID COOLED MTL (25.0 HP)

MTEFI (26.0 HP)

MOWER DECK (continued) Blade Size (Typical)

42 in. (107 cm) SD 22 in. (56 cm)

2 in. (5 cm) Center Overlap (Two Blades, CW Rotation)

48 in. (122 cm) GHS 25 in. (64 cm)

2 in. (5 cm) Center Overlap (Two Blades, Counter Rotate)

Deck Suspension Torsion-Flex Frame with

Caster Wheels and Counterweight Springs

CURB WEIGHT (Approximate)

SD Tractor Only 660 lb (299 kg) 705 lb (320 kg) GHS Tractor Only 785 lb (356 kg) 845 lb (383 kg) Tractor and Mower* 990 lb (449 kg) 1050 lb (476 kg)

*Dimensions and weight shown are for 48 in. (122 cm) GHS Model (typical).

Dimensions for Tractor and Mower with 42 in. (107 cm) deck are:

Length = 88 in. (224 cm)

Width = 43 in. (110 cm) For SD Models, subtract 7 in. (18 cm) from the height. Deck weight for 48 in. (122 cm) Tilt-Up deck = 205 lb (93 kg). Deck sizes range from 42 to 74 in. (107 to 157 cm), with corresponding deck weights ranging from 170 to 400 lb (77 to 136 kg). Optional (9.5 Bushel) Grass Catcher adds approx. 5 lb (2 kg) and 5 in. (13 cm) in Height

DRIVE BELTS

Engine PTO Walker P/N 8230 Walker P/N 8230 Jackshaft Drive Ga tes 3VX375

(or Walker P/N 6250) Ground Drive, Micro-V Walker P/N 7248 Walker P/N 7248 Blower (GHS Model) Gates 3VX280

(or Walker P/N 7234-1)

22 in. (56 cm) 2 in. (5 cm) Center Overlap (Two Blades, CW Rotation)

25 in. (64 cm) 2 in. (5 cm) Center Overlap (Two Blades, Counter Rotate)

Tor sion- Fle x Frame with Caster Wheels and Counterweight S prings

Gates 3VX375 (or Walker P/N 6250)

Gates 3VX280 (or Walker P/N 7234-1)

GHS SYSTEM (Optional)

Blower 4 x 10 x 1/4 in. (10 x 25 x 1 cm)

Three-Blade Paddle Whee l

(Driven by Mower Engine) Blower Brake Band Brake (Works in Combi-

nation with PTO Clutch, Stops

Blower within Fi ve (5) Seconds

of PTO Disengagement) Max. Blower Speed 3600 RPM 3600 RPM Grass Catcher Capacity 65 Gallons (246 liters)/

7.0 Bushels

Optional Grass Catcher Capacity

89 Gallons (392 liters)/

9.5 Bushels

4 x 10 x 1/4 in. (10 x 25 x 1 cm) Three-Blade Paddle Wheel (Driven by Mower Engine)

Band Brake (Works in Combination with PTO Clutch, Stops Blower within Five (5) Seconds of PTO Disengagement)

65 Gallons (246 liters)/

7.0 Bushels 89 Gallons (392 liters)/

9.5 Bushels

Specifications

MODEL

AIR COOLED

MT (20.0 HP)

LIQUID COOLED MTL (25.0 HP)

MTEFI (26.0 HP)

GHS SYSTEM (Optional) (continued)

Full Signal (Grass-Pak

Powerfil

SEAT

FRAME/BODY CONSTRUCTION

Frame All Welded Unitized Steel

Body 14 Gauge Steel 14 Gauge Steel Deck 11 Gauge Steel 11 Gauge Steel GHS Catcher and Chutes Molded Cross- Lin ke d

Switch) Oscillating Vane Switch

Mounted on Grass Delivery

Spout Triggers Horn Signal

Oscillating Delivery Spout

Driven by 12 Volt Electric

Gearmotor Spreads Material

throughout Interior of Catcher

@ 25 Cycles/Minute

Contour-Molded, with Nylon

Backed Vinyl Cover and

Integral Foam Cushion

Chassis

Polyethylene (UV Stabilized)

Oscillating Vane Switch Mounted on Grass Delivery Spout Triggers Horn Signal

Oscillating Delivery Spout Driven by 12 Volt Electric Gearmotor Spreads Material throughout Interior of Catcher @ 25 Cycles/Minute

Contour-Molded, with Nylon Backed Vinyl Cover and Integral Foam Cushion

All Welded Unitized Steel Chassis

Molded Cross-Linked Polyethylene (UV Stabilized)

NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time without notice or obligation.

Component Identification

Catcher Door

Safety Latch

Turbine

Precleaner

NOTE: Control Identification

shown in Operating Instructions section.

Grass Handling System

9.5 Bushel Catcher (Optional)

7.0 Bushel Catcher Standard (Not Shown)

Tilt-Up

Latch

Spring Clip

Transmission Control Rod

Adjustment Nut (LH)

Anti-Scuff

Roller

Catcher Lift /

Dump Handle

Fuel Tank

and Cap

Counterweight S pring

and Protective Cover

Transmission Control Rod

Adjustment Nut (RH)

Deck Lift Handle

(Cutting Height Adjustment)

Deck Support Arms

Tilt-Up

Deck Handle

Tilt-Up

Hook

Deck Support Pins

and Height Adjustment

Hitch Pins

Footrests

Deck

Caster Wheels

Front View and Right Side View

Component Identification

Gas Spring

Cover

Catcher Lift /

Dump Handle

Instrument Panel

Guard

Instrument Panel Box

(Shock Mounted)

Catcher Door

Gas Spring

Removable Grass

Catcher Screen

(Not Visible)

Catcher Exhaust

Deflector

Catcher

Door

Dump

Plate

Catcher

Door Handle

Left Hand

Drive Wheel

Muffler

Tailpipe

Anti-Scuff

Roller

Rear View and Left Side View

Oil

Filter

Oil Drain

Plug

Tailwheel Fork

and Wheels

Fuel

Filter

Component Identification

Model MT

Donaldson Air Cleaner

Air Restriction Indicator

Fuel Pickup

Line

Air Intake Hose

Fuel Tank

Precleaner

Tube

Jackshaft

PTO Gearbox

Dipstick

Turbine

Precleaner

Air Cleaner

Cover

Air Intake

Plenum

Fuel Filter

Fuel Pump

Muffler Grass

Shield

Throttle and

Choke Linkage

Muffler Heat

Shield

Oil Dipstick/Oil Fill

Rubber Bumper

(Catcher Support)

Muffler

20 Amp Fuse

(Starter Solenoid)

GHS Blower

RH Transmission

Lockout Lever

30 Amp

Circuit Breaker

PTO

Clutch Lever

Positive (+)

Battery Cable

Negative (-)

Battery Cable

RH Hydrostatic

Transmission

Neutral Safety

Switch

LH Hydrostatic

Transmission

Battery

LH Transmission

Lockout Lever

Top View (Engine Compartment) Model MT

Component Identification

Model MTL

Donaldson

Air Cleaner

Low Idle

Adjustment Screw

Air Restriction Indica tor

Fuel Pickup

Line

Air Intake Hose

Fuel Tank

Air Cleaner

Cover

Fuel

Filter

Overflow

Hose

Overflow

Tank

Muffler

Shield

Tailpipe

Radiator

Hose

Throttle and Choke

Linkage

Radiator Cap

Oil Dipstick/

Oil Fill

Precleaner

Tube

Water Pump

Top View (Engine Compartment) Model MTL

Air Intake

Plenum

Radiator

Guard

Component Identification

Model MTEFI

Donaldson Air Cleaner

Air Restriction Indicator

Fuel Pickup Line

Fuel Return Line

Air Intake Hose

Fuel Tank

Precleaner

Tube

Air Cleaner Cover

Fuel Pump

Fuel Line to Engine

(High Pressure)

Cylinder Head

Temperature Switch

Muffler Grass

Shield

Throttle Linkage

Oil Dipstick/Oil Fill

Muffler

Rubber Bumper

(Catcher Support)

Ignition

Coil

Top View (Engine Compartment) Model MTEFI

Air Intake

Plenum

Safety Instructions

Pay particular attentio n to any information labeled

DANGER, WARNING, CAUTION, IMPORTANT,

and NOTE in this manual. When you see the Safety Alert Symbol ( ),

read, understand, and follow the instr uctions. Failure to comply with safety instructions may result in personal injury.

The seriousness or degree of imp ortance of each type of information is defined as follows:

DANGER

An IMMEDIATE hazard that WILL result in severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.

WARNING

A POTENTIAL hazard that COULD result in severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.

Walker Manufacturing cannot predict every potentially dangerous situation. Therefore, items labeled as such in this manual do not cover all conceivable situations. Any person using procedur es, tools, or control techniques not recommended by Walker Manufacturing must take full responsibility for safety.

The Walker Rider Lawnmower has been designed with many safety features to protect the operator from personal harm or injury. However , it is necessary for the operator to use safe operating procedures at all times. Failure to follow safety instructions con-

tained in this manual may result in persona l injury or damage to equipment or property.

If you have any questions concerning setup, operation, maintenance, or safety, please contact your authorized Walker Mower Dealer or call Walker Manufacturing Company at (970) 221-5614.

BEFORE OPERATING

1. Read and understand the contents of this

Owner’s Manual before starting and operating the machine. Become thoroughly familiar

with all machine controls and how to stop the machine and disengage the controls quickly. Replacement Owner’s Manuals are available by sending the Model and Serial Number to:

Possible hazards or unsafe practices that MAY result in MODERATE personal injury or property damage, or machine damage, if warning is ignored and proper sa fety precautions are not taken.

IMPORTANT: Identifies mechanical information de-

manding special attention, sinc e it deals wit h the possibility of damaging a part or parts of the machine.

NOTE: Identifies information worthy of special attention.

CAUTION

Walker Manufacturing Company

5925 East Harmony Road

Fort Collins, CO 80528

2. Never al low chi ldre n to op erate rider mower. Do not allow adults to operate without proper instruction.

3. Clear the area to be mowed of any fo reign objects which may be picked up and thrown by cutter blades. Pick up all sticks, stones, wire, and any other debris.

4. Keep everyone, es peci all y child re n an d pets, a safe distance away from the area being mowed.

Do not mow with bystanders in the area.

5. Do not operate the machine barefoot or wearing sandals, sneakers, tennis shoes, or similar lightweight footwear. Wear substantial protective

footwear.

Safety Instructions

6. Do not wear loose fitting clothing that could get caught in moving parts. Do not operate this machine while wearing shorts; always wear adequate protective clothing, including long pants. Wearing safety glasses, safety shoes, and a helmet is advisable and required by some local ordinances and insurance regulations.

7. Prolonged exposure to loud noise can cause impairment or loss of hearing. Operator hearing protection is recommended; particularly for continuous operati on of the GH S Mode l due to blower noise level. Wear a suitable hearing protective device, such as earmuffs or earplugs.

8. Keep all protective shields and safety de- vices in place. If a protective shield, safety device, or decal is damaged, unusable, or missing, repair or replace it before operating the machine.

9. Be sure interlock switches are functioning correctly, so th e engine cannot be starte d unless the Forward Speed Control lever is in the NEUTRAL-PARK position, and the PTO clutch is in the DISENGAGED position. Also, the engine should stop if the operator li fts off the seat with the PTO clutch in the ENGAGED position.

10. Handle gasoline with care. Gasoline is highly flammable and its vapors are explosive :

a. Use an approved fuel container. b. Never add fuel to a running engine or hot

engine (allow hot engine to cool several minutes).

c. Keep matches, cigarettes, cigars, pipes,

open flames, or sparks away from the fuel tank and fuel container.

d. Always fill the fuel tank outdoors using care.

Fill to about one inch from the top of the tank. Use a funnel or spout to prevent spilling.

e. Replace the machine fuel cap and container

cap securely a nd clean up any s pilled fuel before starting the engine.

11. Never attempt to make any adjustments while the engine is running, except where specifically instructed to do so.

12. The elec trical system battery contains sulfuric acid. Avoid any contact with skin, eyes, and clothing. Keep the battery and acid out of reach of children.

OPERATING

1. Operate the mower only in daylight or in good artificial light with good visibility of the area being mowed.

2. Sit on the seat when starting the engine and operating the machine. Keep feet on the deck footrests at all times when the tractor is moving and/or mower blades are operating. Never op-

erate the tractor without a deck or implement installed.

3. For a beginn ing operator, learn to steer (maneuver) the tractor with a slow engine speed before attempting any mowing operation. Be

aware that, with the fr ont mo unte d m ower c on figuration, the back of th e tractor swing s to the outside during turns.

4. Remember, for an emergency stop, the forward motion of th e tractor can always be stopped by pulling the Forwar d Speed Control (F SC) into the NEUTRAL-PARK position.

5. In case either of the transmission drive belts break during operation, and if the machine is on a slope, the machine will f reewheel down the slope. To maintain control, immediately (1) Release the steering levers and simultaneously (2) Move the FSC to the NEUTRAL-PARK position. When the machine is sto pped or moving slowly, engage the parking brake.

NOTE: The emergency stop procedure is exactly the same procedure as used to normally stop and park this machine.

6. Disengage the blade clutch and put the FSC in the NEUTRAL-PARK position before starting the engine (an ignition interlock switch normally prevents starting of th e machine if these controls ar e in the OPERATING position).

7. Do not run the engine in a confined area with- out adequate ventilation. Exhaust fumes are hazardous and can be deadly.

8. Do not carry passengers - maximum seating capacity is one (1) person.

Safety Instructions

9. Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowing tall grass, mow higher th an desired to expos e any hidden obstacles. Then, clean the area and mow to the desired height.

10. Avoid sudden start s or stops. Bef ore backing the machine up, look to th e rear to b e sure n o one is behind the machine. Watch carefully for traffic when crossing or working near roadways.

11. Disengage the blade drive when transporting the machine across drives, si de wa lks , e tc. Ne-

ver raise the mower deck while blades are rotating.

12. The maximum recommended side slope operating angle is 20 degrees or 33% grade.

When operating the machine on a slope, reduce speed and use ca ution to start, stop, and m aneuver. To prevent tippin g or loss of control of the machine, avoid sharp turns or sudden changes in direction.

13. Never adjust cutti ng height with the engine running. Before adjusti ng cutting height or servicing, disengage th e blade cl utch (PTO), stop the engine, and remove the ignition key. W ait for all movement to stop before getting off the seat.

NOTE: A blade/blower br ake should nor mally stop drive line rotation within five (5) seconds of disengaging the PTO clutch.

14. For side discharge mower decks, do not oper-

ate with the grass deflector chut e removed .

Keep the deflec tor in th e lowest possible position.

15. For tractors equipped with tilt-up deck, observe

the following recommendations:

a. Do not move tractor with dec k in tilt-up po-

sition.

b. Never tilt body f orward with deck in tilt-up

position.

17. For GHS equipped models, use care when closing the grass catcher door . Keep fingers and hands away from the hinge and pinch points when the door is being closed. Also, keep fingers and hands clear of the door frame. The door is held closed with springs and the door may slam shut with considerable force.

18. In case of a clogged or plugged mower deck

or GHS catching system:

a. Disengage the blade clutch (PTO) and turn

the engine off before leaving the seat.

b. LOOK to make sure blade drive sh aft and

blower drive pulley movement has stopped

before trying to unclog the system. c. Disconnect the spark plug wires. d. Never place hands under the deck or in the

GHS blower - us e a stick or similar tool to

remove clogged material.

19. If the cutting bl ades strike a solid object o r the machine begins to vibrate abnormally, immedi-

ately disengage the blade clutch (PTO), stop the engine, and wait for all moving parts to stop. T o prevent accidental starting, disconnect

the spark plug wires. Thoroughl y inspect the mower and repair any damage before restarting the engine and operating the mower. Make sure cutter blades are in good condition and blade nuts are torqued to 60 ft-lb (81.3 N

20. Do not touch the engine or muffler while the engine is running or immediately after stopping the engine. These areas may be hot enough to cause serious burns.

21. When leaving the machine unattended, dis-

enga ge t he b lade clu tch (PTO), stop t he e n gine, and remove the key.

22. For Model MTL, never remove the radiator pressure cap when the engine is hot (hot

water may spray and cause burns).

⋅m).

16. For GHS equipped models, do not operate the

machine with the grass catcher in the DUMP position or with the back door OPEN. Dan-

gerous projectiles may be thrown out of the discharge chute or the back of the grass catcher.

MAINTENANCE

1. To prevent accidental starting of the engine when servicing or adjusting the machine, remove the key fro m the ignition sw itch and disconnect the spark plug wires.

Safety Instructions

2. T o reduce fire haz ards, keep the engine free of grass, leaves, excessive grease, and dirt.

3. Keep all nuts, bolts, and sc rews tig ht to e n su re the machine is in a safe, working condition. Check the blade mounting nuts frequently , making sure they are tight.

4. Perform only maintenance instructions de- scribed in this manual. Unauthorized maintenance operations or machine modifications may result in unsafe operating conditions.

5. If the engine must be running to perform a maintenance adjustment, keep hands, feet, and clothing away from moving parts. Do not wear

jewelry or loose clothing.

6. Always use the proper engine service manual when working on the engine. Unautho-

rized maintenance o perations or modifications to the engine may result in unsafe operating conditions.

7. Altering the equipment or engine in any manner which adversely affects its operation, performance, durability, or use will VOID the warran- ty and may cause hazardous conditions.

c. Ke ep sparks, fla mes, a nd smo king mater i-

als away from the ba ttery at all times. To avoid sparks, use care when removing battery cables from posts.

d. Disconnect both battery cables before

unplugging any wiri ng connectors or mak ing repairs on the electrical system.

IMPORTANT: Keep all applicable manuals immediately accessible to anyone who may operate or service this machine.

8. Never attempt to discon nect an y safe ty de vices or defeat the purpose of these safety devices.

9. Do not change the engine g ove rnor se ttings or overspeed the engine. The governor has been factory-set for m axim um- s afe engi ne ope rating speed.

10. Use genuine factory replacement parts. Substitute parts may resu lt in produ ct malfunc tion and possible inj ury to the operator and/or others.

11. Use care when charging the batter y or per- forming maintenance on the battery and electrical system:

a. Make sure the battery charger is unplugged

before connecting or disconn ecting cables to the battery.

b. Charge the battery in a well-ventilated

space, so gases pro duced while charging can dissipate. Make sure the battery vents in the caps are open.

Safety Instructions

SAFETY, CONTROL, AND INSTRUCTION DECALS

Safety, Control, and Instruction Decals are installed on the machine;

if any are missing, illegible, or damaged, a replacement should be ordered and installed before

putting the machine into operation. The Decal Part Number is listed below and in the Parts Manual.

Each End of Mower Deck (5808 All Decks Except 52, 56, 74)

(5808-1 52, 56, 74 Decks)

SD Deck Discharge Shield (5848)

Front Body Adjacent to

RH Steering Lever (7818)

On Body Adjacent to Clutch

Control Lever (5806)

Adjacent to Blower Discharge Chute

through Body (5804)

Hydrostat Oil

Reservoir (5810-2)

Engine Shroud (5855)

Rear Cross Member of Front Body (8825)

Right Side of Front Body, Below

Front Body Latch Release (7820)

Battery Hold-Down Bar (MTEFI only, 5844-2)

Rear of Grass Catcher Exhaust Screen (5869)

Safety Instructions

SAFETY, CONTROL, AND INSTRUCTION DECALS

Safety, Control, and Instruction Decals are installed on the machine;

if any are missing, illegible, or damaged, a replacement should be ordered and installed before

putting the machine into operation. The Decal Part Number is list ed below and in the Parts Manual.

Jackshaft Support Adjacent

to Dipstick (7827)

Deck Carrier Frame (8647)

Deck Gearbox Cover (5807-3)

Deck Carrier Frame (5865)

Top of Blower Housing (5819)

Catcher Door Hinge Bar,

LH and RH Sides (5868)

Gear Axle (5810-1)

On Engine (6810)

Catcher Safety Latch,

RH Side (5874)

Right Side, Below Operator Seat (7809)

Left Side of Operator Seat (8819)

Left Side of Operator Seat (7819)

Deck Carrier Frame (8653)

Instrument Panel MT (8823-2), MTEF I (8823 -3 ), MTL (882 3- 4)

Fender, RH Side (78 02)

Assembly Instructions

SETUP INSTRUCTIONS

Walker Mowers are shipped partially assembled. After uncrating the tractor and mower deck, initial setup is required.

NOTE: During the process of unpacking, any damaged or missing parts should be noted and reported to the delivering ca rrier immediately (put in wri ting within 15 days). The carr ier will provide directions for proceeding with a claim to receive compensation for damage.

Tire Installation (Tractor)

• Install the drive ti res usin g the eig ht (8) lug bo lts

that are supplied with the own er’s packet of materials. Bolts ar e torqued to 75 to 8 5 ft-lb. Drive ti res are 18 x 9.50-8, 4-ply; rear tires are 13 x 5.00-6, 4-ply.

• Check and adjust the inflation of the tires. The

tire inflation recommendations are:

Drive = 15 PSI (103 kPa) Rear = 20 PSI (137 kPa)

Battery Service

CAUTION

Important Battery Service, Installation, and Changing Tips for MTEFI:

• Do not allow the battery cables to touch

opposing terminals. When connecting battery cables attach the po si tive ( + ) ca b le to positive (+) battery terminal first, followed by negative (-) cable to negative (-) battery terminal.

• Never start the engine whe n the cables

are loose or poorly connected to the battery terminals.

• Never disconnect battery while engine is

running.

• Never use a quick battery charger to

start the engine.

• Never "jump start" the engine using

another source. Electricity fluctuations can damage the ECU (Electronic Control Unit).

• Do not charge battery with key switch

"on."

• Always disconnect negative (-) battery

cable lead before charging battery, and also unplug harness from ECU before performing any welding on equipment.

Raise front mower body up for battery access (refer to Front Body Latch Release in Operatin g In struc- tions). Check the battery for electrolyte level and charge. The elec trolyte lev el should be at the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above plates]. If the specific gravity is less than

1.225, the battery needs charging. If the battery has been shipped dry, or is wet but needs service, refer to the following instructions.

IMPORTANT: Make sure battery is securely mounted in the frame. A loose ba ttery may cause damage to the case resulting in acid leakage and severe damage to the machine. A hazard may be created by damage to critic al wor king parts and safe ty systems.

Wet Battery Service

If the battery has been shipped wet, but the electrolyte level is low or the batter y needs to be cha rged then:

1. Fill each battery cell with drinking water to the bottom of the vent wells.

2. Charge battery. Refer to Battery Charging in this section.

Dry Battery Servic e

DANGER

Activating a battery can be dangerous. The battery should be taken to a reliable service station, battery store, or power equipment dealer where a trained technician can activate the b attery safely. DO NOT attempt to activate the battery unless you are experienced in battery service work. The following activation and charging instructions are provided for use by a trained battery technician.

Assembly Instructions

DANGER

Battery electrolyte is a poisonous and corrosive sulfuric acid solution.

• Avoid spillage and contact with skin,

eyes, and clothing - causes severe burns.

• To prevent accidents, wear safety gog-

gles and rubber gloves when working with electrolyte.

• Neutralize acid spills with baking soda

and water solution.

T o fill (activate) battery with electrolyte (if battery has been shipped dry):

1. Remove the battery hold down bar, disconnect the battery cables and lift the battery out of the tray.

IMPORTANT: Battery must be removed from the mower before filling with electrolyte.

IMPORTANT: Obtain and use only battery grade sulfuric acid electrolyte with a 1.265 specific gravity to activate the battery. DO NOT use water or any other liquid during initial activation.

2. Remove the fil ler caps and care fully fill each cel l until the electrolyte is just above the plates.

3. After the battery is filled with electrolyte, replace the filler caps and c harge the ba ttery. Refer to

Battery Charging.

Battery Charging

DANGER

BA T TERIES PRO DUCE EXPLO SIVE GASE S

• Charge the battery in a well-ventilated

area, so that gases produ ced while charging can dissipate.

• Keep sparks, flames, and smoking mate-

rials away from the battery at all times.

• Make sure the battery cap vents are

open after the battery is filled with acid (check manifold vent on each cap).

• Make sure the battery charger is unplug-

ged before connecting or disconnecting cables to the battery.

1. Charge the battery at 15 amps for 10 minutes. DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific gravity is at least 1.250. Total charging time should not exceed one (1) hour.

2. After charging the battery , adjust the electrolyte level to the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above the plates].

IMPORTANT: DO NOT overfill the battery. Electrolyte will overflow through the vented caps onto parts of the machine and WILL result in severe corrosion.

3. Install battery.

Battery Installation

IMPORTANT: Make sure battery is securel y mounted in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe damage to the machine. A hazard may be created by damage to critical working parts and safety systems.

Install the battery in the mower as shown in Battery Installation photo. Connect the pos itive and n egative cables to the proper battery terminal (red cable and boot connects to the Positive (+) te rminal). Slide the rubber boot up and over the battery post, making sure it co vers the post completely to pre-

vent an electrical short.

Assembly Instructions

WARNING

Make sure the battery cap vents are open. Improper venting of the battery COULD cause a battery explosion.

Battery Clamp

Secured by

Wing Nut(s)

Battery Protector

Plate in Place

Battery Installation

Mower Deck Assembly

Deck Caster Wheels Installation

1. Remove the bolt, nut, axle spacer tube, and spacer washers from e ach deck caster wheel fork.

NOTE: Spacer washers are used only when the optional semi-pneumatic deck wheels (8.25 x 2.75) are installed.

2. Fit the axle spacer tube through the wheel hub, position the spacer washer on each side of the hub (if used), and fit the assembly into the wheel fork.

3. Insert the 3/8-16 x 4-1/2 in. bolt through the wheel fork with the bolt head to the outside and install the 3/8-16 in. Keps nut.

(+) Battery Cable

Connection

Grease Fitting

Locations

Spacer Washer

Axle Spacer Tube

Deck Caster Wheel Installation

NOTE: If semi-pneumatic wheels are installed,

make sure the spacer washers fit over the spacer tube and are not caught be tween the fork and the end of the tube. The washers should move freely on the axle spacer tu be.

5. Grease the cast er wheel bearings and caste r pivot bearings - one grease fitting for each wheel and each pivot.

Deck Discharge Chute Installation (GHS Rear Discharge Models Only)

Mount the discharge chute hinge on top of the deck discharge opening us ing the 1/4- 20 x 1/2 in. so ck et button head bolt and 1/4-20 ESNA nut. Position the bolt with the head inside of the chute and the nut on the outside. Attach spring for tilt-up action from chute to bracket on deck.

Carrier Frame

Tube Sockets

Attach Guard

Attach

Chute

4. Tighten the bolt and nut until the axle spacer tube bottoms against the inside of the wheel fork (will not turn) while the wh eel and spacer washers (if used) spin freely without binding.

Nut on Top

Discharge Chute and PTO Shaft Guard

Installation on Rear Discharge Deck

Assembly Instructions

Deck Discharge Shield Installation (Side Discharge Models Only)

Attach the deck side discharge shield by positioning the shield hinge l ug in front of the deck mo unt an d fastening with two 3/8-16 x 1-1/4 in. bolts, 3/8-16 ESNA nuts, and 3/8 in. wave spring was hers. The wave washers fit between the two hinging surfaces. Tighten the nuts until the shield moves freely but is not loose.

WARNING

Attach Spring

DO NOT operate the machine without the grass deflector chute at tached and in th e lowest possible position.

Attach Shield

Discharge Shield Installation

on Side Discharge Deck

PTO Shaft Guard Installation

Position the shaft guard and mo unt with tw o 1/4-20 x 1/2 in. bolts.

Tilt-Up Roller Wheel Installation

Mount the two ( 2) ti lt -u p ro ller wheels on th e b r ack ets on the rear skirt of th e deck housing usin g the P/N 8490 axle bolt, 3/8 in. wave spring was her and 3/8-16 in. Whiz lock nut. Tighten the axle bolt until the wheel rolls freely, but is not loose.

Roller Wheels

Tilt-Up Spring and Roller Wheel

Installation on Rear Discharge Deck

Mower Deck lnstallation on Tractor

Deck Installation

1. Lightly grease each deck support arm (2) on the tractor. Refer to Mower Deck Installation photo on next page for location of deck support arm.

2. Engage the deck carrier frame tube sockets on the tractor support arms (refer to Discharge Chute and PTO Shaft Guard Installation photo for socket location). Slide the deck onto the support arms: all the way if SD equipped model, approximately 3 in. (76 mm) if GHS equipped model.

NOTE: When installing the DSD52 or DSD62 Mower deck, make sure to retract the dolly wheel after mounting the deck on the tractor.

3. If the deck is rear discharge (GHS equipped model), the rear discharge chute will need to be aligned and connecte d to the blower in let during the last 2 in. (51 mm ) of slide act ion on the support arms.

NOTE: Raising the mower body may be helpful in fitting and guiding the deck chute into the blower.

4. Install the hitch pin through the hole on the end of each support arm to lock the deck in plac e (refer to Deck Counterweight Spring Installa- tion ph oto). Two (2) hitch pins are inc luded in the owner’s packet of materials.

Assembly Instructions

5. Connect the mower deck PTO drive shaft assembly to the tractor with the splined quick disconnect coupler. This coupler simplifies shaft alignment and installation.

a. Use the arrows on the shaft and tube to

align and slide the PTO quick coupler onto the deck spline shaft.

b. Reaching under the tractor, pull the ring

back on the coupler, slide onto the spline shaft on the tractor, and release the ring.

IMPORTANT: To prevent damage to the mower, make sure the PTO shaft assembly is securely locked on the tractor, with the locking balls fully seated in the groove and the ring in the full forward position (refer to the Coupler Ring “Locked” Position photo). After installation, pull on the shaft to check for security.

Pull Back Spring-Loaded

Coupler Ring

6. Raise the front mower bod y (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the front body to tension the springs. (Refer to Deck Counterweight Spring Instal- lation Photo.)

Grease Deck

Support Arms

PTO Connection

Arrows on Shaft and Tube

(used to align when sliding together)

Mower Deck Installation (PTO Shaft Connec t io n )

Installing PTO Quick Coupler

Spring-Loaded Coupler Ring

In Fully Forward Position

Coupler Ring “Locked” Position

7. With the counterweight springs co nnected, the weight on the deck caster wheels should be 15 to 25 Ib (7 to 11 kg). Check this weight by lifting on the front of th e deck carrier frame. If required, the spring tension can be adjusted by tightening or loosening the elastic stop nuts located underneath the lower spring hook. Refer to Deck Counterweight Spring Installa- tion photo.

Spring Tension Adjustment

Nut Located Under Lower

Spring Hook (Not Visible)

Counterweight Springs Clip

Onto Body With Forward

Body Tilted Up

Deck Counterweight Spring Installation

Hitch Pins

Lock Deck On

Support Arms

Assembly Instructions

Deck Leveling

1. Position mower on a smoo th, leve l surfac e. Set the cutting height to th e highest position - 4 in. (102 mm) - for easy acce ss under the deck to measure blade hei ght. Refer to ADJUSTING

CUTTING HEIGHT in Operating Instructions. NOTE: A block of wood cut 4 in. (102 mm) high

is a convenient gauge to measure blade height above ground during the leveling process.

WARNING

The machine must be shut off during this procedure.

2. Check the side-to-side level. Rotate each blade sideways and measure the distance from blade

tip to ground on each side. If measurements vary more than 1/8 in. (3 mm), ad d a washer shim under the deck support pins on the low side to level the deck.

3. Check the front-to-rear level. Rot ate the blades to point forward. Me asure the distance from blade tip to ground on t he front and rear. The rear of the blade should be 1/8 to 1/4 in. (3 to 6 mm) higher than the front of the blade; shim the rear (or front) deck support pins equally to achieve at least 1/8 in. (3 mm) difference.

NOTE: The mower deck and support frame are jig welded; within normal toleran ces, very little, if any, shimming should be required to level the deck. Tire pressure will influence the levelness of the deck. Check the tire pressure as a possible cause of the deck not being level.

4 in. (102 mm)

Wood Block

Should not vary more

than 1/8 in. (3 mm)

side-to-side

Should be 1/8 in. (3 mm)

to 1/4 in. (6 mm) higher

at the rear of the blade

4 in. (102 mm)

Wood Block

Deck Leveling

Assembly Instructions

PREOPERATING CHECKLIST

Before operating the mower for the first time, and as a routine before da ily operations, it is important to make sure the mower is properly prepared and ready for operation. The following is a list of items to be checked. (For a mower with frequent operation, some of these items will not need to be checked every day, but the operator should be aware of the condition of each.)

For proper fuels and lubricants refer to Specifica-

tions.

FILL FUEL TANK

Fill the fuel tank using clean, fresh automotive grade unleaded gasoline (87 octane rating minimum).

DANGER

Handle gasoline with care. Gasoline is highly flammable and its vapors are explosive. Use safe refueling procedures:

• DO NOT fill fuel tank with the engine run-

ning.

• If the engine is hot, allow to cool before

refueling.

• Use an approved fuel container.

• Fuel the mower outdoors.

• DO NOT smoke while refueling.

• Avoid spilling fuel; use a funnel or spout.

IMPORTANT: DO NOT mix oil with gasoline. Always use fresh, automotive grade gasoline. DO

NOT use premium, white, or high-test gasoline. DO NOT use additives, such as carburetor cleaners, de-

icers, or moisture removing agents. DO NOT use gasoline blended with methyl alcohol.

CHECK ENGINE CRANKCASE OIL LEVEL

Check the en gine cran kcase oi l level bef ore use an d after each 5 hours of continuous operation. Refe r to LUBRICATION for Checki ng Engine Cra nkcase Oil Level in Maintenance Instructions.

CHECK AND SERVICE ENGINE AIR CLEAN-

ER SYSTEM

• Check air restriction gauge to make sure there is

no red indication showing.

• Check condition, cleanliness, and security of the

complete air cleaner system (clean air filter every 100 hours). For detailed procedures, refer to CLEANING the Engine Air Cleaner System in Maintenance Instructions.

ADJUST CARBURETOR (Initial Start-up Only)

For Model MT and MTL, refer to ADJUSTMENTS of Carburetor in Maintenance Instructions.

CHECK ENGINE COOLING SYSTEM - Model

MT and MTEFI

Check that the engin e cooling air intake screen is free of obstruction by grass clipping s or debris and clean if required. Also, cylinder head cooling fins should be inspected and cl eaned if any build-up of debris is noted [remov e two (2) cylinder head access panels to inspect and clean].

• DO NOT overfill the fuel tank; fill up to

about 1 in. (25 mm) below the top of tank.

IMPORTANT: DO NOT permit dirt or other foreign

matter to enter the fuel tank. Wipe dirt from around the filler cap before removing. Use a clean fuel storage container and funnel.

Check performance of the c ooling system by s tarting the engine, holding a hand adjacent to the cylinder heads, and feeling the cooling airflow.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

Assembly Instructions

CHECK ENGINE COOLING SYSTEM - Model

MTL

• Check the radiator air intake screen to make

sure the screen is clean and free of obstruction. Also, the radiator cooling fins should be inspected and cleaned if t here is any bu ildup o f dirt or debris. (Rem ove th e int ake sc reen as sembl y to inspect and clean.)

• Check the coolant levels in the radiator and over-

flow tank. If additional coolant is needed, refer to

CHECKING/SERVICING the Engine Cooling System in

Maintenance Instructions.

WARNING

DO NOT remove the radiator pressure cap when engine is hot.

CHECK GEAR AXLE OIL LEVEL

Refer to Gear Axle Lubrication in Maintenance In-

structions.

CHECK AND CLEAN GRASS BUILDUP UN-

DERNEATH MOWER DECK (and inside GHS blower, if equipped)

Refer to CLEANING the GHS Blower in Mainte- nance Instructions for blower cleaning information.

DANGER

Never operate cutter blades with de ck in raised position because it is hazardous.

The tilt-up deck can be secured in the raised position by unlocking the deck lock levers on each side of the carrier frame and inserting the deck hook into the tiltup latch on the tractor body. Before operating the tractor, make sure to re-engage the deck lock levers after lowering the deck to the normal operating position.

Tilt-Up Latch

INSPECT FOUR (4) DRIVE BELTS

Engine PTO Drive, Jackshaft Drive, Hydrostatic Ground Drive, and GHS Blower Drive (if equipped).

CHECK HYDROSTATIC TRANSMISSION OIL

LEVEL

Refer to LUBRICATION for Checking Hydrostatic

Transmission Fluid Level in Maintenance Instructions.

CHECK BATTERY ELECTROLYTE LEVEL

Refer to CHECKING/SERVICING the Battery in

Maintenance Instructions.

C HECK FUNCTIONS OF INSTRUMENT PANEL

AND WARNING HORN

Turn the ignition key to the RUN position. Voltmeter, Oil Pressure Light, and Warning Horn should all operate, indicating normal function.

CHECK TIRE PRESSURE

Deck Caster Wheel = 20 PSI (137 kPa) Drive = 15 PSI (103 kPa)

Rear = 20 PSI (137 kPa)

Tilt-Up Latch

Tilt-Up Hook

on Deck

Deck Lock Lever

Deck Secured in TILT-UP Position

CAUTION

Do not operate machine with deck tilt-up pivot joint unlocked.

DANGER

Do not operate the mower with deck in tiltup position. Do not move t he tra ctor with the deck in the tilt-up position.

Assembly Instructions

CHECK MOWER BLADE CONDITION, SHARP-

NESS, AND SECURITY OF MOUNTING

The blade mounting nut should be tightened to 60 ft-lb (81.3 N refer to CHECKING/SERVICING for Sharpen Mower Blades in Maintenance Instructions.

ADJUST MOWER CUTTING HEIGHT, IF RE-

QUIRED

Position the hitch pins in the four deck support pins. Refer to the “Cutting Heig ht Adjustment” decal on the deck gearbox cover.

PERFORM ANY ADDITIONAL PROCEDURES

called for on the MAINTENANCE SCHEDULE CHART in Maintenance Instructions.

⋅m). If blade sharpening is required,

Operating Instructions

CONTROL IDENTIFICATION, LOCATION, AND FUNCTION

Operating Controls

CAUTION

Before operating the mower, become familiar with the location and function of all operator controls. Knowing the location, function, and operation of these controls is important for safe and efficient operation of the mower.

Engine Choke - (Model MT and MTL only)

The choke control l ever (black knob) i s located on the left side of the seat. T o start a cold engine, move the choke control f orwar d to the ON posi tion. After engine starts, move the choke control toward the OFF position, keeping enough choke to allow the engine to run smoothly as it warms up. As soon as possible, move the choke to the OFF position. A warm engine requires little or no choke for starting.

IMPORTANT: Make sure the ch ok e is in the OFF position during normal engine operation; running with the choke in the ON position CAN damage the engine.

Front Body

Latch Release

Forward Speed Control

Parking

Brake

Blade Clutch (PTO)

(FSC)

Steering Levers

Operating Controls

Operating Instructions

Choke Throttle

Steering Levers

Each drive wheel is controlled by its own inde pendent steering lever, for both steering function and FORWARD/REVERSE motion. The FSC lever sets the maximum forward speed , and als o sets the for ward position of the steering levers. The steering levers operate only with a backward pulling movement of the lever, which causes the drive wheel for that lever to first slow down, stop, and then reverse with a full backward lever stroke. The levers are releas ed to the FORWARD position for “straight- ahead” ground travel.

Choke and Throttle Location (MT and MTL)

Engine Throttle

The throttle control lever (red knob) is located on the left side of the sea t and is used to control engin e speed. Moving the leve r forward toward the FAST position increases engine speed ; moving it back- ward toward the IDLE position decreases engine speed.

Forward Speed Control (FSC)

Forward Speed Control (FSC) has two functions: One is to set forward travel speed, and the othe r is to establish the NEUTRAL-PARK position. When the FSC lever is move d into the FORWARD posi- tion, a friction lo ck holds an y forwa rd speed setting from 0 to 5 mph (0 to 8 km/h). The ground speed is proportional to the le ver positi on; the furth er the lever is advanced forward, the faster the tractor moves. It is not necessary to hold the FSC in position since the friction lock maintains the selected lever position. Pulling back on the steering levers overrides the FSC setting and slows or stops forward travel. Releasing the steering levers allows the tractor to resume forward travel at the speed set by the FSC lever. T o stop and park the machine, the FSC lever is moved backward to the NEUTRAL-

PARK position.

NOTE: Pushing forward on the steering levers will

not cause any change in tractor moti on - there will be no steering lev er reaction and there will be no machine damage.

Blade Clutch (PTO)

The blade clutch lever has two positions. Pulling the lever UP engages the PTO that dr ives the mower blades. Pushing th e lever DOWN disengages the PTO and engages the blade brake.

NOTE: On GHS equipp ed models, the Powerfil motor and Grass-Pak® full signal switch are activated by engaging the blade clutch. Refer to Using the GHS Catcher in this se ction for a complet e descri ption of GHS operation.

Parking Brake

The parki ng brake f unction s by locki ng a pin into the hydrostatic transmission pi nion gear teeth. Movi ng the lever FORWARD engages the parking brake; moving the lever BACKWARD releases the brake.

IMPORTANT: Stop the tractor completely before engaging the parking brake. The parking brake uses a positive mechani cal lock si milar to the PARK position on an automotive automatic transmiss ion. If the tractor is moving when the br ake is enga ged, it will result in sud den s toppage an d p os si ble i nte rn al damage to the axle drive.

NOTE: If pressure on the parkin g brake pin (e.g. parked on a hill) makes it i mposs ible to releas e the parking brake with the parking brake lever, move the mower gently forward or backward to release the pin.

Operating Instructions

The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers

LEFT WHEEL

STEERING LEVER

Forward P osition

(No Control Change)

RIGHT WHEEL

STEERING LEVER

FORWARD SPEED

CONTROL LEVER (FSC)

Full Forward

Ground Speed

Position

Neutral-Park

Position

Reverse Drive

Wheel Motion

Position

MTL MTEFI MT

Fast

Throttle

Position

PARKING

BRAKE

Disengaged

Position

Intermediate

Ground Speed

Position

Neutral-Park

Position

Engaged

Position

Disengaged

Position

Idle

Position

ON Position

OFF Position

MT, MTEFI, and MTL Operating Controls (Top View from Drivers Point of View)

THROTTLE

Engaged

Position

BLADE CLUTCH (PTO)

Pull Up to Engage

CHOKE (MT & MTL)

Operating Instructions

Front Body Latch Release

The front portion of the trac tor bod y hinges fo rwar d for maintenance acces s and is latched down in the OPERATING position. To raise the body, move the latch release forward.

Front Body

Latch Release

Front Body Latch Release

T ransmission Lockout Levers

NOTE: The transmission plunger on the side of the transmission case (activated by the LOCKOUT LE- VER) must be completely released during operation of the mower, otherwise operation of the tran smission will be erratic.

Optional Cold Start Lever (Jackshaft Drive Belt Release)

The cold start lever is used for starting the mach in e in cold weather [below 40° F (4° C)]. Pulling the lever UP disengages the jackshaft drive belt. W hen the jackshaft drive belt is released, the hydrostatic transmissions are remo ved from the engine starter cranking load.

Cold Start Lever

Disengaged

The transmission loc kout levers disengag e the hydrostatic transmissons. By lifting the lever on top of the transmission a nd locking it into place with th e lockout cam, the hydrostatic tr ansmissions are released to permit freewheeling. By releasing the cam and lowering the lever, the transmissions are en- gaged for normal operation. The transmission lever in the LOCKOUT position is used to enable moving the machine without the engine running (e.g., for service). Refer to TRANSMISSION LOCKOUT in this section for operating instructions.

Lockout

Levers

Transmission

Plunger

Optional Cold Start Lever

Normal Operating Position

Cold Start Lever

Engaged

Optional Cold Start Lever

Cold Start Position

Lockout Lever Location

Operating Instructions

Instrument Panel

This illustration shows the configuration of the switches and ind ic ato rs lo cated on the ins trument panel.

Oil Pressure

Warning Light

Hourmeter

Voltmeter

Over Temperature

Warning Light

Ignition

Switch

MTEFI

Voltmeter

Light Switch

(Optional)

7 AMP

Circuit Breaker

Water

Temperature

Gauge

7 AMP

Circuit Breaker

Oil Pressure

Warning Light

Light Switch

(Optional)

Oil Pressure

Warning Light

Over Temperature

Warning Light

Hourmeter

Water Temperature

Warning Light

Ignition

Switch

Warning

Horn

Voltmeter

Service Engine Soon

Warning Light

Warning

Horn

Ignition

Switch

MTL

Light Switch

(Optional)

Hourmeter

10 AMP

Circuit Breaker

Instrument Panel

7 AMP

Circuit Breaker

Warning

Horn

Operating Instructions

Hourmeter

The hourmeter displays operating time accumulated while the ignition switch is in the ON position .

Voltmeter

The voltmeter displays battery and charging system voltage. An indication of low or high voltage (the red area) indicates an electrical system f ailure. The cause of the failure sh ould be deter mined and corrected.

Oil Pressure Warning Light

The oil pressure warn ing li ght indi cates tha t eng ine oil pressure is below the safe operating level [below 3 to 5 PSI (21 to 34 kPa)]. This light (and warning horn) will come on when the ignition is turned ON, but should go off after the engine is started . If the ligh t fails to come on when the ignition switch is turned ON, it could indicate a burned out bulb. If the light comes on during engine oper ation, stop the engine immediately and correct the source of the problem before further engine operation.

IMPORTANT: Continued operation of the engine with an illumina ted oil pressure warning l ight MAY cause severe eng ine damage (i f a low oil pres sure condition exists).

Water Temperature Warning Light (Model MTL)

The water temperature warni ng light indicates that engine coolant temperatu re is abov e the s afe op er ating limit and the engine is over heating. If this light comes on, there may be a problem with:

• Radiator cooling air flow (material packed into radi-

ator cooling fins, clogged air intake screen)

• Cooling fan not operating

• Low coolant quantity in cooling system

Water Temperature Gauge (Model MTL)

The water temperature gauge monitors engine cooling system temperature. If engine coolant temperature exceeds 230° F (110° C), an overheat condition exists; the water temperature light will come on and the warning horn will sound.

WARNING

If engine cooling system overheating is indicated, continued operation of the engine, even for a short time, COULD re su lt in fire, risk of personal injury, and severe damage to equipment.

Over Temperature Warning Light (Model MT and MTEFI Only)

The over temperature warning light indicates that engine oil temperature and/or cylinder head temperature are above the safe operating limit and the en- gine is overheating [above 305° F (152° C) oil or 450° F (232° C) c ylinder head]. If t his light comes on, there may be a problem with:

• Engine cooling system (material packed into cyl-

inder head cooling fins, clogged air intake screen)

• Low oil level in crankcase

Stop the engine and correct the source of the p ro blem before further operation.

IMPORTANT: Continued operation of the engine with an illuminated ov er temperature warning light MAY cause severe engine damage (if a high oil temperature or head temperature condition exists).

Engine Service Light - Model MTEFI

The engine service ligh t indicates the Engine Con trol Unit (ECU) has detected a fault in the engine performance. When this light il luminates during operation, contact an authorized Kohler Service dealer to diagnose the fault.

IMPORTANT: Continued operation of the engine with an illuminated en gine se rvice light will r esult in sub-standard performance and MAY cause engine damage if not corrected as soon as possible.

Operating Instructions

Ignition Switch

The ignition switc h is u se d t o s tart and s top th e e ngine. The switch has three positions: “O” is the OFF position, RUN is the position the key returns to after starting, and “S” is the START position. When starting the engine, turn the key clockwise to the “S” position. Do not hold the key in the “S” position longer than 10 seconds. If the engine does not start, return the key to the “O” position for at least 60 seconds before making a res tart attempt. Prolonged cranking can damage the starter moto r and shorten battery life. Release the key when the engine s tarts, and it will retu rn to th e “ RUN” posi t ion . To stop the e ngi n e, rotate the key counterclockwise to the “O” position.

OFF

Circuit Breakers

Depending on model, either one or two manual reset circuit breakers are located on the instrument panel. Each has a button that pops out if the circuit breaker trips. For Models MT a nd M TEF I, the 7 am p c ircu it breaker protects the safety circuits and GHS. For Model MTL, the 7 amp circuit brea ker protects the warning lights/horn, safety circuits and GHS. For Model MTL, the 10 amp circui t break er prote cts the headlights. For Model MT, the 30 amp circuit breaker (located n ear the battery) protects the instrument panel and headlights. For Model MTL, the two 30 amp circuit breakers protect the instrument panel, starter solenoid and ’fan’ control module. For Model MTEFI, the 30 amp circu it breaker protects the instrument panel, headlights, starter solenoid and ECU.

START

Ignition Switch

Light Switch (For Optional Lights)

Operates headlights (when ins talle d) .

Warning Horn

The warning horn sounds to alert the operator that an unsafe engine condition is being indicated when engine temperature is too high or engine oil pressure is too low. If the horn sounds, check the indicator lights and correct the problem before further operation.

Operating Instructions

STARTING THE ENGINE

CAUTION

Before operating the mower, read and understand all Safety Instructions and Operat- ing Instructions.

WARNING

NEVER run the engine in an enclosed or poorly ventilated area. Engine exhaust contains carbon monoxide, an odorless and deadly gas.

1. Before attempting to start the engine, make sure the operator is in the seat, the Forward Speed Control is in NEUTRAL-PARK position, and the blade clutch and parking brake are

DISENGAGED. NOTE: Release parking brake to prevent extra

load on the starter if the transmission neutral is slightly out of adjustment.

CAUTION

A safety interlock switch system PREVENTS CRANKING the engine with either the Forward Speed Control or the blade clutch (PTO) out of neutral. If the engine cranks otherwise, the safety system is not working and should be repaired or adjusted before operating the mower. DO NOT disconnect safety switches; they are for the operator’s protection.

Cold Start Lever

Engaged

Optional Cold Start Lever

2. For Model MT and MTL, move the choke lever to the ON position and move the throttle 1/4 to 1/2 open (toward FAST). Turn the ignition switch to the START position to start the engine. Relea se the key to RUN position as soon as the engine starts.

NOTE: For Model MT and MTL, the choke may not be required if the engine is warm.

IMPORTANT: If the engine fails to start after approximately 10 seconds of cranking, the engine should be checked before further cranking. Turn the key to the OFF position and allow a 60 second cool-down period between starting attempts. Failure to fo llow the se guideline s can damage the starter motor and shorten battery life. Consult your Walker dealer or Authorized Kohler dealer for additional help.

3. After the engine starts, make sure th e oil pres sure light goes off. If not, stop the engine immediately and find the cause of the problem. Make sure the oil pressure light is off prior to engaging the mower blades and beginning operation.

NOTE: For starting in cold we ather [below 40° F (4° C)], use the optional cold start lever to release the jackshaft drive belt an d remove the hyd rostatic transmission from the starter cranking load. After the engine has been started and warmed u p, lower the lever to re-engage the jackshaft drive belt.

4. For Model MT and MTL, gradually move the choke to the OFF position, keeping enough choke on to allow the engin e to run smoothly as it warms up. As soon as possible, move the choke to the OFF position.

Operating Instructions

IMPORTANT: For Model MT a nd M T L, m ake su r e the choke is in the OFF positi on during n ormal engine operation; running with the choke in the ON position CAN damage the engine.

ADJUSTING GROUND SPEED AND STEERING IMPORTANT: If the DSD52 or DSD62 Mower deck

is installed on the tractor, make sure the dolly wheel is retracted BEFORE moving.

CAUTION

Learn to START, STOP, and MANEUVER the mower in a large, open area.

If the operator has not operated a machine with LEVER STEERING OR DUAL HYDROSTATIC TRANSMISSIONS, steering and ground operation should be learned and practiced until the operator is completely comfortable handling the machine BEFORE ATTEMPTING TO MOW.

DANGER

Keep feet on footrests at all times when the machine is moving. Never operate the tractor without a deck or implement installed.

1. Move the FSC out of NEUTRAL-PARK position to the desired forward speed. DO NOT hold forward on steering levers. It is not necessary to hold the FSC lev er in position since a friction lock maintains the selected lever position (and forward travel speed).

NOTE: If the FSC lever will not stay in the selected position, the friction lock needs to be adjusted. Refer to ADJUSTMENTS of Forward

Speed Control Friction Lock in Maintenance Instructions.

Beginning Recommendations are:

♦ Learn operation of the mower in an open

area away from buildings, fences, and obstructions. Learn operation on flat ground BEFORE operating on slopes.

♦ St art maneuvering the mower with SL OW

engine speed and SLOW Forward Speed Control setting until familiar with all operating characteristics.

♦ Remember it is not necessary to hold the

steering levers forward (a unique Walker feature); always PULL on the levers for steering or for reverse motion of the mower.

♦ Learn to operate the mower with your left

hand on the steering levers and right hand on Forward Speed Control. The use of two hands on the steering levers tends to cause overcontrol.

♦ Learn to operate the steering levers with

smooth action. Jerky movements are hard on the transmission and lawn. For sharp turns, do not allow th e insid e whee l to stop and twist on the grass . Pull the steer ing lever controlling the inside wheel into reverse for a smooth “rolling” turn (one wheel rolling forward while the other rolls backward).

♦ Practice maneuvering the mower until

you can make it go exactly wh ere you are aiming.

♦ Remember, for an emergency stop, or in

case of loss of control, mach ine movement can always be stopped quickly by pulling the Forward Speed Control into the NEUTRAL-PARK position.

2. Steer by pulling the lever on the side of desired direction of turn, e.g., pull the LH lever to turn left. To minimize the p ossibilit y of ov ercontrol , use only one hand on both steering levers.

Operating Instructions

Pull Steering Levers

With Left Hand

Forward Speed Control

(FSC)

Correct Operator Hand Position

on the Controls

3. Reverse directio n of the m ower by pu lling both levers backward.

NOTE: Smooth action on the steering levers will produce smooth mower operation. Remember to keep the engine and ground speed slow until learning the control response.

4. The FSC may be adjusted forward for faster ground speed and bac kw ard for s lower ground speed. When mowing, ground speed should be adjusted to match the load on the cutter blades, i.e., as the eng ine pull s down i n heavy cutting , pull back on the FSC lever to reduce ground speed. Adjusting ground speed helps maintain a balance between engine power and blade speed for high-quality cutting action.

5. Stop ground travel by pulling both steeri ng levers backward to th e NEUTRAL po si tion (tra ctor not moving) and then moving the FSC lever to the NEUTRAL-PARK position.

NOTE: If the tractor creeps forward or backward with the FS C lever in the NEUTRAL-PARK position, the transmission control needs to be adjusted. Refer to ADJUSTMENTS of Trans- mission Control in Maintenance Instruc tions.

Keep Feet On Footrest

When Moving

ENGAGING THE MOWER

1. Set the engine throt tle at ab out 1/3 s peed. Do

not attempt to engage the blade clutch at high engine speeds. This will drastically short-

en drive belt life. Use only moderate engine speed when engaging the blade clutch.

2. Pull the blade clutch leve r SLOWLY up to en- gage the mower blades.

CAUTION

A safety interlock switch (seat switch) will cause the engine to stop if the blade clutch is engaged and the operator is not in the seat. The function of this switch should be checked by the operato r raising off the seat and engaging the blade clutch; the engine should stop. If the switch is not working, it should be repaired or replaced before operating the mower. DO NOT disconnect the safety switches; they are for the operator’s protection.

IMPORTANT: DO NOT engage the blade clutch

when transporting t he mower across drives, sidewalks, loose materials, etc. DO NOT engage the

blade clutch with the PTO shaft disconnected

(the mower deck removed from tractor).

CAUTION

If the cutting blades strike a stationary object while mowing, stop the mower immediately, disconnect the spark plug wires, lift the deck, and inspect the deck and blades thoroughly for damage. Make sure that the blade timing has not been disturbed (the blades should be at 90 degrees to each other). Refer to REPLACING/REPAIRING the Blade Overload Shear Bolts in Maintenanc e Instructions if blades are out of time. Also, make sure t he bl ade re t ai ning nuts are torqued to 60 ft-lb (81.3 N

⋅m).

Operating Instructions

WARNING

A brake stops the cutter blades (and blower on GHS equipped models) from freewheeling within five (5) seconds after disengaging the clutch. If the brake system malfunctions and the blades do not stop within five (5) seconds, the brake should be adjusted or repaired before operating the mower. Refer to ADJUSTMENTS of Blade Clutch (PTO) in Maintenance Instructions.

Engaged

Position

Blade Clutch Engaged

Disengaged

Position

Blade Clutch Disengaged

4. Turn the ignition switch OFF. When stopping the engine, do not reduce the throttle below 1/2 speed. Since the engine is equipped with a shutdown solenoid, stopping at low idle may cause engine run-on or backfiring.

WARNING

Remove the key from th e ignition switch when leaving the mower unattended. This will prevent children and inexperienced operators from starting the engine.

5. Engage the parking brake. IMPORTANT: The hydrostatic transmissions

lock to prevent the mower from rolling freely with the engine stopped. However, if the mower is parked on a slope, it is necessary to ENGAGE the parking BRAKE to prevent the mower from creeping. This is due to a small amount of slippage in the hydrostatic tr ansmissions, especially when transmission fluid is warm.

WARNING

STOPPING THE MACHINE

1. Slow the engine to a fast idle; put the throttle in the 1/2 throttle position.

2. Pull the steering lever s to the NEUTRAL position and then move the FSC le ver bac kward to the NEUTRAL-PARK position.

3. Disengage the blade clutch. IMPORTANT: DO NOT disengage the blade

clutch with high engine speed (above 1/2 throttle) since the brake action on the blade drive will cause premature wear of the brake band.

In case either of the transmission drive belts break during operation, and if the machine is on a slope, the machine will freewheel down the slope. To maintain control, immediately (1) Release the steering levers and simultaneously (2) Move the FSC to the NEUTRAL-PARK position. When the machine is stopped or moving slowly, engage the parking brake.

NOTE: The emergency stop procedure is ex-

actly the same procedure as used to normally stop and park the machine.

Operating Instructions

ADJUSTING CUTTING HEIGHT

WARNING

The engine must be stopped before adjusting cutting height. Disengage the blade clutch (PTO), stop the engine, and remove the ignition key . Wait for all movement to stop before getting off the seat.

Cutting height is adjusted by positioning the four retainer hitch pins in a series of seven vertical holes on the deck support pins. Lift handles have been provided on each end of the deck to assist in raising the deck while positioning the hitch pins. Cutting heights range from 1 in. (25 mm) [top holes] to 4 in. (102 mm) [bottom ho les] in 1/2 in. (13 mm) increments.

Lift Handle

Deck Support

3. The mower will “freewheel” with the levers in the LOCKOUT position. The levers must be in the highest position to completely unlock the transmissions.

Lockout Lever

Plunger

Depressed

Lockout Lever - Freewheel Position

4. After moving the mower, release the locking cam, placing the lever DOWN in the normal OP- ERATING position. Make sure the transmission lockout plunger on the side of the tran smission case (activated by the lockout lever) is com- pletely released, otherwise the transmission operation will be erratic.

Cam in

LOCKOUT

Position

Hitch Pin

Cutting Height Adjustment

TRANSMISSION LOCKOUT IMPORTANT: DO NOT TOW the tractor with the

transmission lockout engaged. Towing can produce excessive interna l pressure an d damage th e transmission.

To mo ve the mower with the engine NOT running (dead battery, maintenance, etc.), the hydrostatic transmissions are unlocked (released).

1. Raise the front body.

2. Lift the transmissi on lockout lever on both th e RH and LH transmissions and secure into place with the locking cam.

Lockout Lever

Cam in

Plunger

Released

Lockout Lever - Normal Operating Position

UNLOCKED

Position

Operating Instructions

RECOMMENDATIONS FOR MOWING IMPORTANT: Operate the engine at full speed

when mowing, to allow the engine to produce full horsepower and to increase efficiency of the engine cooling system.

• Keep the mower deck and discharge chute clean.

• Mow with shar p blades. A dull blade tea rs the

grass (resulting in poor lawn appearance) and uses extra power (slowing the mowing speed).

• It is preferable to cut grass when it is dry and not

too tall. Mow frequently and do not cut grass too

short. (For best appearanc e, cut off 1/3 or less of existing grass height.)

• When mowing, operate the engine at or near full

throttle for the best cutting action and performance

of the grass handling system (GHS). Mowing with a lower engine RPM caus es the mow ing bla de to not cut clean and tear the grass. The engine is designed

to be operated at full speed.

• Whe n mowing in adverse condition s (tall and/or

wet grass), mo w the grass twi ce. Raise the mo wer to the highest setting - 4 in. (102 mm) - for the first pass and then make a second pass cutting to the desired height.

• When using a side discharge mower deck, the

side discharge shield must not be removed and must be kept in the lowest possible position to deflect grass clippings and thrown objects downward. Orient the side discharge away from sidewalks or streets to minimize cleanup of clippings. When mowing close to obstacles, orient the side discharge away from obstacles to reduce the chance of damage to property by thrown objects.

Side Discharge Shield in Lowest Position

• When op erating on a slope, reduce speed and

use caution to start, stop, and maneuver. Avoid

sharp turns or sudden changes in direction. The

maximum recommended side slope operating angle is 20 degrees or 33% grade.

• Use a slow setting on the FSC for trimming

operations.

• Make sure the mower is leveled properly for a

smooth cut. Refer to Deck Leveling in Assembly

Instructions.

• Use an alternating stripe mowing pattern for

best appearance and vary the direction of the stripe

each time the grass is mowed to avoid wear patterns in the grass.

• Avoid damage to the grass by slipping and skid-

ding of the drive tires . Use sm oot h co ntrol mov ements of the steering levers since the hydrostatic

transmissions are “power boosted controls” and jerking the levers can easily slip the tires. For sharp turns, do not allow the inside wheel to stop and twist on grass; pull inside steering lever into reverse for a smooth “rolling” turn (one wheel rolling forward while the other rolls backward).

Maximum Recommended

Side Slope - Do Not Operate

on Steep Slopes

Maximum Recommended Side Slope

Operating Instructions

RECOMMENDATIONS FOR TILT-UP DECK OPERATION/TRANSPORT

To avoid potential deck and/or tractor damage while using the tilt-up deck, the following recommendations are offered:

• Do not move the tractor with the deck in the tilt-

up position since both the roller wheels (on the back of the deck) an d the GHS di scharge c hute may be damaged by moving the tractor. The tilt-up configuration should only be used when the tractor is parked.

• The tractor body should never be tilted for-

ward with the deck in the tilt-up posit ion. This can

cause the deck to unhook from the tractor and fall with considerable force , poten tiall y caus ing dec k or tractor damage and/or bodily injury.

• Whe n transporting a tr actor with the d eck in the

tilt-up position (on a truck or trailer), the deck should be secured to the vehicle with a strap or

rope (stop vertical movement). This will prevent the deck from bouncing on the rear roller wheels (causing breakage). This wi ll al so prev ent t he d ec k from unhooking from the tractor and falling, potentially causing deck or tracto r damage. Damage to other items parked in front of the deck may also occur.

Operating Instructions

GRASS HANDLING SYSTEM (GHS) GHS Model Only

PTO and Blade

Gear Drive

Shear

Bolt

Shear Pin

Powerfil

Drive Motor

Actuator

Rod

“Full” Signal

Catcher

Delivery Chute

PTO

Clutch

Horn

Grass-Pak Vane Switch

Catcher Door

Safety Latch

Exhaust Screen

(Removable)

Grass Catcher

Dump Handle

Powerfil

Delivery Spout

Exhaust

Deflector

Catcher

Door

Catcher

Door Spring

Body Chute

Assembly

Blower

Deck

Discharge Chute

Rear Discharge

Mower Deck

GHS Flow and Components

Operating Instructions

General Information

The Grass Handling System (GHS) consists of a rear discharge mower deck connected to a 10 in. (25 cm) blower an d a rear mounted grass ca tcher with 7.0 bushel (246 lite rs) capacity or optional 9. 5 bushel (335 liters) capacity. The GHS blower operates any time the mower blade clutch is eng aged and moves grass thr ough the rear discharge de ck chute into the grass ca tcher. Blower airflow is exhausted out the back of the grass catcher, through a filtering screen. When the grass catche r is full and needs to be emptied, a “full” signal horn alerts the operator. When the “full” signal horn sounds, it is important to stop mowing to prevent overfilling and clogging of the blower system.

IMPORTANT: Normally, the GHS blower operates with no maintenance or cleaning required. However, under certain operating conditions, the insid e of the blower housing may accumulate a deposit of dirt, causing wear and binding of the blower wheel. Normally, dirt buildup occurs when mowing a com- bination of dirty and damp grass, especiall y in the springtime. When operating in these conditions, check the blower wheel frequently for binding and clean the blower hous ing as requir ed. Refer to CLEANING the GHS Blower in Mainte-

nance Instructions.

NOTE: When a side discharge or mulching mow-

er deck is installed on the GHS model, a blower intake cover should be installed in the blower intake tube. This cover “unloads” the blower and seals the intake to effectively eliminate power loss and blower noise when the blower is not being used.

Blower

Intake Cover

Blower Intake Cover

NOTE: An alternative to using the blower intake

cover when a side discharge or mulchin g deck is installed on a GHS model is the blower lockout kit (P/N 6541). The blower lockout kit releases tension on the blower dr ive belt and does not req uire the blower intake cover.

NOTE: In Autumn, when using the GH S mo wer to vacuum leaves, it is recommended to raise the front of the mower deck 2 to 3 n otches [1 to 1-1/2 in. (25 to 38 mm)] higher than the rear. This will avoid “bulldozing” leaves, particularly when the leaves are piled in a thick layer. To make this adjustment, the hitch pins in the two (2) front deck support pins are repositi oned 2 to 3 no tches high er while leaving the rear pins in their original position.

DANGER

NEVER operate the GHS catcher with the back door open. Objects may be thrown out the back of the catcher with sufficient force to cause serious injury to bystanders or property damage. NOTE: For noncatching operation, the "No-Catch" Deflector is an available accessory item.

DANGER

ROTATING BLOWER BLADES

NEVER operate the GHS blower with the blower discharge chute un covered (gr ass catcher in the dump position) since dan gerous projectiles may be thrown. NEVER put hands into the blower discharge chute for any reason. Use a stick or similar instrument to remove any material if clogging has occurred.

CAUTION

NEVER leave grass clippings in the grass catcher after mowing. Damp clippings generate heat as they decompose. This MAY cause spontaneous combustion.

Operating Instructions

Clogging Checklist In case of clogging, there will be a distinct change

in the sound of the blower, i.e., the blower soun d

will stop. Also, the mower deck will begin to leave a trail of grass clippi ngs. When th is occurs, sto p the engine, disconnect th e spark plug wir es, and make

sure all movement has stopped before attempting to unclog.

DANGER

NEVER place hands under the mower deck or in the GHS blower discharge chute. Use a stick or similar tool to remove any clogged material.

Normally, any clogging will first dev el op at the ba ck of the mower deck in the discharge opening into the blower chute. Clogging at this point does not indi-

cate a particular problem in this part of the system, but is a symptom of something restricting the flow of material throughout the entire

system. The following list of items should be checked if a pattern of clogg ing begins to deve lop. All of these items are capable of causing clogging at the back of the deck.

• Check to see if the RH and LH mower blades are

installed for the correct rotation - install blades so the cutting edges move toward each other.

Blades Must Operate at

Right Angles (90 Degrees)

FORWARD

• Check the amount of flat section re maining at

blade tip. This is the are a that is g round aw ay (removed) when the blades are sharpened. If too much of the flat section is removed, the “air lift” performance or “shovel” effect of the blade deteriorates to the point that dis charge of grass cl ippings into the blower chute is m arginal. Replac e cutter blades if less than 3/4 in. (19 mm) flat section remains at the blade tip.

• Check th at the interior of the dec k housing and

baffling is reasonably clean and free of grass and dirt buildup. While some degree of material buildup

can be tolerated, a point is finally reached where the flow of air and grass clippings is restricted.

NOTE: One condition that quickly causes a buildup of material in the deck housing is mowi ng grass and/or weeds whic h ar e “jui cy.” The material collects under the deck with sticky, green juice. Clover and weeds are especially a problem. The mower deck will need to be cleaned frequently when operating in these conditions.

• Check the deck cutting height setting. When

working in thick, tall grass, lower deck settings [1 to 2 in. (25 to 51 mm) cutting heights] tend to restrict airflow from moving into and under the

deck. Raising the deck cutting height will significantly increase airflow and reduce clogging when working in thick, tall grass.

• Check the interior of the chute connecting the

mower deck to the blower for smoothness and freedom from obstruction.

• Check the blower wheel for bent blades and

excessive clearance between the blade tip and the

blower housing. A clearance greater than 1/8 in. (3 mm) will cause a significant loss of blower performance.

Rear Discharge

Torque = 60 ft-lb

Chute

Blade Rotation for GHS Mower Deck

(view from underneath)

Mounting Nut

(81.3 N

⋅m)

• Check the bl ower disc harge chu te into the gr ass

catcher for smoothness and freedom from obstruction.

• Check the elbow inside the grass catcher for a

buildup of material in the radius of the elbow. In certain conditions (damp/dirty grass) a considerable “clump” of material can accumulate at this point, greatly restricting material and airflow.

Operating Instructions

• Check th at the openings in the removable air

exhaust screen in the grass catcher are not plugged. If the screen is clogged, refer to Cleaning the GHS Exhaust Screen in this section.

NOTE: An optional exhaust screen with larger

holes (3/ 4 is available for use when mowing in wet grass; the screen provides less airflow restriction and more clog resistance (us e standard screen in dry conditions to avoid excessive material blowing out of the catcher).

Remember, anything that restricts airflow or material flow along the entire path from the mower deck to the grass catcher can cause clogging.

Using the Tilt-Up Deck Refer to CLEANING of Grass Build up in Mower

Housing in Maintenance Instructions. Using the GHS Catcher

Powerfil

The GHS catcher has an oscillating grass delivery spout (POWERFIL grass clippings thr oughout the interior of the grass catcher (even when mowing wet, heavy grass). The oscillating action may be checked by turning the ignition switch to the ON position and movi ng the blade clutch to the ENGAGED position. The spout should oscillate approximately 25 cycles per minute.

NOTE: If the grass spout fails to oscillate, the clutch switch should be che cked for function (the switch closure is adjustable).

“Full” Signal Horn

The GHS catcher has a “full” signal horn to alert the operator to dump the catcher when it is full (to prevent overfilling an d clogging). The “full” signal horn is activated by a vane switch (Grass-Pak switch) mounted on the grass delivery spout. Oscillating action of the spout triggers the vane switch as grass begins to fill in around the spout when the catcher is almost full.

) which is designed to spread

WARNING

DO NOT test the Grass-Pak® switch with the engine running. Projectiles may be thrown out of the grass delivery spout, and COULD cause serio us injury.

The “full” signal horn is designed to operate (sound) when the grass catcher is almost full. The timing of the signal is adjus table by chang ing the pos ition of the vane on the Grass-Pak coming on too soon (catcher not completely full) or too late (grass cl ogging in cat cher spout a nd delivery chute), refer to ADJUSTMENTS of GHS “Full”

Signal Horn in Maintenance Instructions. NOTE: The horn signal should be adjusted to

sound BEFORE the catcher is co mpletely full to give the operator time to react and stop mowing. An indication the horn s ig nal is c omi ng on to o l ate (d e layed too much) is if grass clippings are falling out of the grass catcher delivery chute when the catcher is dumped.

Cleaning the GHS Exhaust Screen

To remove the grass catcher screen f or cleaning, open the catcher doo r, push forward and pul l down on the grass catcher screen knobs (on either side of the screen), and slide the screen ou t. Use a high pressure washer or water spray and brush to clean the screen.

Keeping the catcher exhaust screen clean and open is essential to good performance of the catching system. In some mowing condition s, e.g., wet and dirty, it will be necessary to clean the screen frequently to avoid cl ogging the mower deck, blower, and chutes due to airflow restriction.

Grass Catcher

Screen

switch. If the s ignal i s

The “full” signal function may be checked by turning the ignition switch ON, engaging the blade clutch (engine not running), opening the catcher back door, and triggering the Grass-Pak oscillates. The hor n should s ound as the sw itch is moved in both directions.

vane by hand as it

Removal

Knobs

(Not Visible)

Grass Catcher Screen Removal for Cleaning

Operating Instructions

Dumping the Catcher

For dumping, th e cat ch er e ither tailg ate du mps int o a disposal area or dumps into the optional dump bag. The dump bag i s a reusable nylon fabric bag desi gn ed to conv eniently move grass cl ippings from the catcher to a remote disposal area or container.

Tailgate Dumping

1. Open the back door by lifting on the door handle.

NOTE: To prevent accidental door closure, a safety latch locks the door open in the fully

opened position while the catcher is being dumped.

2. Tilt the catcher back to dump by lifting on the catcher lift handle on the lower front corner of the catcher.

3. Lower the catcher smoothly down to the normal operating position. DO NOT allow the catcher

to drop down - the gas spring, that holds the catcher in the raised position, is not a shock absorber for lowering the catcher.

4. Close the door by holding the door handle with the left hand and releasing the safety latch on the door hinge mechanism with the right hand. The safety latch is released by pressing in on the top of the latch. Then, smoothly close the d oor, working against the spring pressure that holds the door closed. DO NOT let the door slam shut by releasing the door before i t is c l os ed.

Safety

Latch

Catcher Door Safety Latch

Using the Dump Bag

1. Open the back door by lifting on the door handle.

NOTE: To prevent accidental door closure, a safety latch locks the door open in the

fully opened position while the catcher is being dumped.

2. Orient the dump bag with one (o r two) of the handle straps on the bag opening facing up.

Tailgate

Door

Handle

DANGER

PINCH POINT - SPRING LOADED DOOR

When lowering the door on the GHS catcher, depress the safety latch on the side of the catcher . BE VERY CAREFUL to keep hands, fingers, etc. out of the hinging mechanism and away from the door frame as the door closes. The springs that hold the door closed during operation are very powerful, and the door can slam shut with considerable force.

Hook Bag

on Bumper

Positioning Dump Bag on Catcher

Operating Instructions

3. Hook the bottom of the bag over the rear bumper while lifting on the handle strap(s).

DANGER

4. Tilt the catcher back to dump int o the bag by lifting on the catcher lift handle on the lower front corner of the c atcher with the one hand while continuing to hold up on the bag strap(s) with the other hand. Refer to photos for positioning the bag and dumping.

Catcher Lift/

Dump Handle

PINCH POINT - SPRING LOADED DOOR

When lowering the door on the GHS catcher, depress the safety latch on the side of the catcher. BE VERY CAREFUL to keep hands, fingers, etc. out of the hinging mechanism and away from the door frame as the door closes. The springs that hold the door closed during operation are very powerful, and the door can slam shut with considerable force.

Power Dump Option

When equipped with the optio nal power dump sys tem, the operator dumps the catcher while sit tin g in the seat. A toggle s witch oper ating a p ower ram is used to raise and lower the catcher. The back door automatically opens and closes during the dump cycle.

Hold the toggle switch UP or DOWN to RAISE or LOWER the catcher. When the catcher reaches the full raised or lowered position, the power ram clutch will make a ratcheting sound. Release the toggle switch as soon as this sound is heard. DO NOT op-

erate the ram with the clut ch ratcheting for an extended time as this will cause extra w ear on the

clutch mechanism.

Dumping Catcher into Dump Bag

5. Lower the catcher smoothly down to the normal operating position. DO NOT allow the catcher

to drop down - the gas spring, that holds the catcher in the raised position, is not a shock absorber for lowering the catcher.

6. Close the door by holding the door handle with the left hand and releasing th e s afet y latc h on the door hinge mechanism with the right hand. The safety latch is releas ed by press ing in on the top of the latch. Then, smo othly close the door, working against the spring pressure that holds the door closed. DO NOT let the door slam shut by releas ing the door before it is closed.

CAUTION

The operator should be in the seat and bystanders stay clear when the power dump is operating. The power dump is used ONLY for tailgate dumping. Do not attempt to use the optional dump bag or any other bag with the power dump.

NOTE: If grass tends to hang up in the catcher af-

ter raising the catcher with the power dump, “jiggle” the steerin g levers and make the tr actor bounce a lit tle to unstick the grass an d make it slid e out of the catcher.

NOTE: With the power dump mechanism in the normal operating position (catcher down), the catcher can be manually raised for access to the engine and the catcher can be manually dumped.

Operating Instructions

Grass Catcher

Cable Guide

Lift Channel

Power Dump

Ram Actuator

Door Actuator

Arm

Catcher Door

Gas Spring

Fork

Catcher Door

Cable Rod

Guide

Cable Assembl y

Gas

Spring

Actuator Mount

Assembly

Dog Leg

Assembly

Rubber

Bumper

Power Dump Components

Maintenance Instructions

CAUTION

Maintenance procedures requiring special training or tools should be performed by a trained technician.

MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MT, MTEFI, MTL

Service Item

Check Engine Crankcase Oil Level x 54 Check/Clean Engine Air Cooling System* x 64 Check Coolant Level, Radiator/Overflow T ank MTL x 67 Clean Radiator Screen and Cooling Fins* MTL x 65 Check Security of Air Filtration Components x 68 Check Air Filter Restriction Gauge x 62 Clean Grass Buildup Under Deck x 67 Clean GHS Exhaust Screen* x 48 Clean GHS Blower* x 66 Service Mower Blades x 69 Check Functions of Instrument Panel and

Warning Horn Lubricate Grease Fittings and Oil Points* x 55 Check PTO Gearbox Oil Level** x 59 Check Battery Electrolyte Level x 68

Check Hydrostatic Transmission Fluid x 60 Check Tire Pressure x 69 Check Drive Belts (Jackshaft, Engine PTO,

GHS Blower, Ground Drive) Check Gearbox Oil Seals x 71 Check Turbine Precleaner* x 62 Check/Clean Air Filter Element*** x 62

Check/Adjust Blade Clutch (PTO)/Brake Action x 83 Check Oil Level in Gear Axle x 59 Clean Hydrostatic Transmission Cooling Fins x 67 Clean Engine Cooling Fins MT, MTEFI x 64 Change Engine Crankcase Oil MT, MTEFI Check Wheel Bolt Torque (75 to 85 ft-lb) x 69 Change Engine Oil Filter MT, MTEFI Change Engine Crankcase Oil MTL Change Engine Oil Filter MTL Check Radiator Hoses and Clamps (MTL) x 71 Check Fuel Lines and Clamps x 71 Check/Regap Spark Plugs x 71 Replace Air Filter Element, safety filter,

Vacuator™ Valve*** Replace Fuel Filter x77

Flush Radiator and Change Coolant (MTL) x 65 Service Battery x68 Check/Adjust FSC Friction Lock x 88 Service Solenoid Shift Starter x 71 Check PTO U-Joints for Wear/Looseness x 71 Change Gear Axle Oil Change Hydrostatic Transmission Fluid Replace Radiator Hoses and Clamps (MTL) x 71 Replace Fuel Lines and Clamps x71 Replace Ignition Wires x71

∗ More often in extremely dusty or dirty conditions (refer to notes about air cleaner element in

IMPORTANT TIPS FOR CARE OF KOHLER ENGINE)

∗∗ Change PTO gearbox oil after first 100 hours of operation (break-in period)

∗∗∗ Air cleaner is remote mounted Donaldson Radialseal™ unit, replace filter every year or after 6 cleanings

∆ Change engine oil and filter after first 5 hours of operation of a new engine (break-in period)

∆∆ Change every 2 years or 1000 hours

∆∆

∆

∆ ∆

∆∆

Daily

x29

Hours

x70

100

Hours

x55

200

Hours Yearly

x55 x55 x55

x62

Every

2Years

x59 x60

Ref.

Page

Maintenance Instructions KOHLER TIPS

IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE

Fuel System

• Fuel must be clean - free from water, dirt, and or-

ganic material.

• Chang e fuel filter on a regular basis and when

contamination is suspected or found in the fuel.

• On the Model MTEFI, the fuel system is pressur-

ized. Do not attempt to service this fuel system. Contact your Walker dealer or authorized Kohler service dealer for work on the fuel system.

Starting/Stopping

• For starti ng in co ld weath er [be lo w 40° F ( 4° C) ],

use the optional cold start lever to release the hydrostatic transmissions from the starter cr an ki ng loa d.

• Start engine with the throttle advanced off idle

(1/4 to 1/2 throttle). This will aid starting, especially in cold weather.

• Keep the battery fully charged.

• Match crankcase oil viscos ity to the am bient tem -

perature, allowing the engine to crank faster and start easier.

• Operate the engine at full speed when mowing.

This allows the engine to produ ce full horsepower and move more cooling air through the engine cooling fins.

Cooling System - MTL

• Fill the cooling system with a pre-mixed solution

of 50/50 antifreeze (ethylene glycol) and distilled water.

IMPORTANT: Solution m ust be pre-mixed before putting it in the engine (ad ding pure antifreeze into the radiator may cause damage to the engine by causing overheating).

• Maintain proper fluid levels in the radiator and

overflow tank.

• Operate the engine at full speed when mowing.

This will allow the engine to produce full horsepower and move more cooling air through the radiator.

Air Cleaner System

• Use only Donaldson air cleaner elements. After-

market elements may not seal in the air cleaner housing, allowing di rt to enter the e ngine. Also, aftermarket filters often ski mp on the filtration media and require more frequent cleaning and replacement (see following instructions).

• Use fast id le for stoppi ng engine to avo id run-on

or backfiring.

Cooling System - MT, MTEFI

• Keep eng in e ai r intake sc r een and cy li nd er hea d

fins free of grass clippings , chaff, and dirt . Inspect intake screen and cooling fins for cleanliness and no damage.

• Periodically remove two access panels in the en-

gine shroud to inspect and clean cylinder head cooling fins.

• Check performance of the cooling system by

starting the engine, holding a hand adja cent to the cylinder head, and feeling the cooling airflow.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

• Use the a ir flow restri ction gauge to indicate the

need to service the air filter.

• Do frequ ently c heck the Turbine Precleaner for

free movement of the internal fan.

• DO NOT over service or freq uently “disturb ” the

air filter. A dirty air filter actually cleans better than a new one. Changing and cle ani ng th e air f ilt er too often can actually reduce filter efficiency and increase the opportunity for traces of dust to enter the engine. Wait until the element really needs servicing as indicated by the air flow restriction gauge.

• When the air filter element is removed or re-

placed, make sure all dust is cleaned out of the air cleaner housing and hose. Use a damp cloth and

wipe the interior of the canister and hose clean (a little dirt left here will be sucked int o the engine and reduce engine li fe). When the filter is reinstalled, make sure the element is held tight and straight in the canister for proper seating and sealing.

• Periodically check the air intake hose for cuts,

nicks, etc., and the hose clamps for tightness.

Maintenance Instructions KOHLER TIPS/LUBRICATION

Oil

• Use only mul ti -vis cos ity oil s as spec ifi ed with the

viscosity matching ambient temperatures for the engine operating co nditions. This will aid starting in cold weather and assure proper lubrication in hot weather.

• Use on ly Kohler oil filters. Aftermarket filters

may not seal properly and/or have the incorrect

pressure relief valve for proper lubrication.

LUBRICATION

WARNING

DO NOT attempt to lubricate the machin e with the engine running. Disengage the PTO clutch, shut off the machine, and remove the ignition key.

Proper lubrication is an important maintenance procedure. It reduces wear and makes the machine quieter and easier to operate.

Engine Oil

Engine Break-In Oil

No special break- in oil is required. The engine is serviced with 10W-30, Service Class SG oil from the factory. Change the oil after the initial engine break-

in period of 5 hours. Thereafter, change oil after every 100 hours of operation (200 hour interval for

MTL).

1. Park the mower on a level surface with the en- gine stopped. Also, make sure the engine is cool and oil has had time to drain into the sump [allow at least five (5 ) minutes after stopping the engine].

IMPORTANT: NEVER check or add oil with the engine running.

2. Before removing the dipstick, clean the area around the dipstick to keep any dirt or debris out of the engine.

3. Remove the dipstick, wipe off with a clea n rag, then reinsert the dipstick into the tube and press all the way down.

4. Remove the dipstick again and check the oil level on the dipstick. The oil level should be within the “Operating Range” on the dipstick (between the “L” mark and the “F” mark).

IMPORTANT: DO NOT operate engine without a sufficient oil supply in the crankcase. DO NOT operate with the oil level below the “L” mark or above the “F” mark on the dipstick.

5. If additional oil is needed, refer to Specifications for proper crankcase lubricant. Fill up to, but

not above, the “F” mark on the dipstick. IMPORTANT: DO NOT overfill the crankcase

(oil above “F” mark) as this CAN result in engine overheating, loss of power, and possible engine damage.

Checking Engine Crankcase Oil Level

Check the engine crankcase oil level before use and

after each 8 hours of continuous operation. IMPORTANT: The importance of checking and

maintaining the proper crankcase oil level cannot be overemphasized. Check the oil level BEFORE

EACH USE.

Full Mark

Low Mark

Dipstick Operating Range

Maintenance Instructions LUBRICATION

Changing Engine Crankcase Oil/Oil Filter

For Model MT and MTEFI, change the engine crankcase oil after every 100 hours of operation and re- place the oil filter every other oil change (every 200 hours of operation).

For Model MTL, change the engine crankcase oil af- ter every 200 hours of operation and replace the oil filter at the same time.

1. Park the mower on a level surface with the en- gine stopped. The engine oil should be warm before draining. If not warm from operation, start the engine and run a few minutes to warm the oil.

2. Remove the dipstick an d the oil d rain pl ug an d drain the oil into a suitable container. Be sure to allow ample time for complete drainage.

Oil Filter

Drain Plug

6. Install the new oil filter on the engine. Turn the filter clockwise unti l the ru bber g asket contacts the sealing surface, then tighten an additional

1/2 turn.

7. Reinstall the drain plug. Make sur e it is tightened to 10 ft-lb (13.6 N

8. Fill the crankcase through the oil filler tube (dipstick opening) with new, clean oil. Use only crankcase lubricants recom mended by the engine manufacturer. Refer to this manual or the engine owner’s manual. Use the recommended oil viscosity for the expected ambient temperature. Oil with the correct viscosity will aid starting in cold weather and assure proper lubrication in hot weather. Fill up to, but not above, the “F” mark on the dipstick. Crankcase capacity is 1.85 quarts (1.75 liter s) plus 1/2 pint (.24 liters) for the new oil filter.

IMPORTANT: Check the dipstick reading before adding the last 1/2 pint of o il and fill on ly to the “F” mark. DO NOT overfill the crankcase (oil above “F” mark) as t h is CAN result in engine overheating, loss of power, and possible engine damage.

·m).

Specifications in

Oil Drain/Oil Filter Location

3. Before removing the oil filter, clean the area around the filter to keep dir t and debris out of the engine.

4. Remove the old oil filter and wipe off the filter mounting surface on the engine.

5. Apply a thin coati ng of clean oil to the rubber gasket on the replacement oil filter.

IMPORTANT: Use ONLY oil filters from the engine manufacturer (Kohler 12-050-01). Aftermarket oil filters may not seal properly and/or may not have the correct pressure relief valve for proper lubrication.

9. Start the engine and check for oil leaks aro und the oil filter. Stop the engine, recheck the oil level, and add oil if nec essar y. (When the engine is first operated with a new oil filter, the oil level drops slightly as the filter is filled with oil.)

Grease Fitting and Oil Point Lubrication Lubricate the grease fi ttin gs and oil points after ev-

ery 25 hours of opera tion. Lubricate more often

when operating in dusty or dirty conditions. Use SAE general purpos e lithium or mol ybdenum base grease for grease fittings and light machine oil (SAE

10) to lubricate oil points. Lubricate the locations

shown in the Chassis and Deck Lubrication Points illustration.

NOTE: PTO universal joi nts (on the deck and trac-

tor) require routine lubrication after eve ry 8 hours of running time. Remove tractor PTO quick disconnect tube assembly for easy access to grease fittings.

Maintenance Instructions LUBRICATION

Ident Lubrication No. No. Location Type Places

1 Deck Caster Wheel Fork Pivot Grease 2 2 Deck Caster Wheel Bearing Grease 2

3 Tee Gearbox, Deck Oil 4 Blade Drive Gearbox Oil 5 Universal Joint Shaft Assembly Grease

6 Pivot Assembly, Tilt-Up Deck Grease 4 7 Deck Support Arm Socket Grease 2 8 Body Hinge Point Oil 2 9 FSC Actuator Rod Pivot Pins Oil 2 10 FSC Lever Pivot Grease 1 11 FSC Lever Fork Grease 1

(Grease Slide Area) 12 (FSC) Friction Body Pivot Grease 1 13 Steering Lever Pivot Grease 4 14 Deck Support Arm Pivot Grease 2 15 Deck-to-PTO Coupling Grease 1

(Grease Slide Area) 16 Universal Joint Tube Assembly Grease 17 Universal Joint Quick Connect Grease 1

Spline (Grease Slide Area) 18 Parking Brake Lever Grease 1

19 Gear Axle Oil 20 Belt Tightener Pivot, Grease 1

Jackshaft Drive 21 Throttle Control Cable Ends Oil 2 22 Clutch Actuator Push Rod Grease 2 23 PTO Clutch Lever Pivot Grease 1 24 Belt Tightener Pivot, Grease 1

PTO Clutch

* 1 * 2

** 1

*** 2

Ident Lubrication No. No. Location Type Places

25 Brake Actuator Rod and Brake Oil 3

Band Pivot Pins (Clevis) 26 Brake Actuator Pivot Grease 1 27 Catcher Hinge Point Oil 2 28 Rear Wheel Bearings Grease 2

29 Engine Oil Oil 30 Choke Control Cable Ends Oil 2

(Models MT and MTL only) 31 Belt Tightener Pivot, Grease 1

Blower Drive (GHS Model Only) 32 Belt Tightener Pivot, Grease 1

Ground Drive 33 PTO Gearbox Dipstick Oil 34 Hydrostatic Drive Oil 35 Choke Control Pivot Oil 1

(Models MT and MTL only) 36 Throttle Control Pivot Oil 1

*** 1

*** 1 *** 2

* Gearboxes are permanently lubricated and

sealed requiring no scheduled lubrication. Oil level should be chec ked onl y when an oil leak is noted. Refer to Mower Deck Gear-

box Lubrication in this section.

** Grease every eight (8) hours. *** Refer to Gear Axle Lubrication, Engine

Oil, Tractor PTO Gearbox Lubrication, and Hydrostatic T ransmission Fluid in this se c-

tion.

NOTE: DGHS42 Tilt-Up Deck is shown for reference.

For other Deck Lubrication Points, Refer to Deck and Carrier Frame Illustrated Parts

Manual.

Maintenance Instructions LUBRICATION

6 7

14 19

20 & 36

30 & 35

33 32 31

6 7

15 16

27 27

Chassis and Deck Lubrication Points

Maintenance Instructions LUBRICATION

Mower Deck Gearbox Lubrication NOTE: These instructions apply to all mower decks

with gear-driven blades. Refer to DSD52 or DSD62 Mower Deck Lubrication in this section for the

DSD52 or DSD62 deck with belt-driven blades. The mower deck gearboxes (tee gearbox and blade

drive gearboxes) are connected as a unitized assembly, and oil flows freely between them. The gearboxes are permanently lubricated (oil filled) and sealed requiring no scheduled lubrication. However, the gearbox oil seals should be checked every 25 hours for indication of an oil leak; particularly the lower seals on the blade drive gear boxes sho uld be inspec ted, since they operate in a dirty environment. If an oil leak is noted, replace the oil seal and relubricate the gearbox assembly as follows:

1. Remove gearbox cover (footrest). Deck orientation should be the normal operating position.

Blade Drive

Gearboxes

NOTE: In case the gearboxes are completely drained of oil, approximately 5 fl. oz. (15 cl) of oil per gearbox is required to refill the gear drive assembly.

NOTE: Since the gearboxes are connected as a unit by connector tubes, it is necessary to add oil slowly. Allow a few minutes after adding oil for the oil to flow throughout the assembly and the oil level to stabilize before reassembly.

IMPORTANT: DO N OT overfill the deck gearboxes. The gearbox assembly is not vented, and overfilling with oil will cause excessive pressure and result in oil leaks.

5. Check condition of the cover gasket and replace if worn or damaged. Reinstall ge arbox cover plates; torque screws to 24 in-lb (2.7 N

DSD52 or DSD62 Mower Deck Lubrication

There are several sp ecial lubrication requiremen ts for the DSD52 or DSD62 mower deck in additi on to the requirements detailed in the Chassis and Deck Lubrication illustration. Lubricate the locations shown in the Blade Spindle Lubrication and Gear- box, Dolly Wheel, and U-Joint Lubrication photos and check and maintain oil in the belt drive gearbox.

⋅m).

Tee

Gearbox

Mower Deck Gearboxes

(shown with gearbox cover removed for clarity)

2. Clean the area around the indivi dual gearbox cover plates to prevent contaminants from entering the gearcase.

3. Remove the screws securing the cover plates on the blade drive gearboxes.

4. Check the level of lubricant in the gearboxes. If the lubricant is low, add SAE E.P. (Extreme Pressure) 90W oil until the oil level is up to (submerges) the horizontal shaft in the gearbox (shaft parallel to cover plate).

1. Lubricate the blade spindles every 25 hours with two (2) shots of SAE general purpose lithium or molybdenum base grease.

Blade

Spindles

Blade Spindle Lubrication

Maintenance Instructions LUBRICATION

2. Check the oil level in the belt drive gearbox every 100 hours (or sooner if a visible oil leak has

developed). With the deck i n the n ormal o perating position, remove the level plug in the side of the gearcase. Add SAE E.P. (Extreme Pressure) 90W oil to maintain the oil level to the plug. If the oil level is low, check the gearbox for any indicat ion of an oil l eak . If an oil le ak is noted, the gearbox will need to be removed and rebuilt.

3. Lubricate the dolly wheel pivot every 25 hours with general purpose grease.

4. Lubricate the U-Joint in the drive shaft every 8 hours with SAE general purpose lithium or molybdenum base grease.

Belt Drive

Gearbox

Jackshaft

PTO

Gearbox

Dipstick Location, Tractor PTO Gearbox

Changing Gearbox Oil

The tractor PTO gearbox is oil filled and vented. No scheduled oil change is required. However, changing the oil after the first 100 hour break-in period will extend gearbox life and is recommend ed.

Dipstick

Vent Plug

Dolly Wheel

Pivot

U-Joint

Gearbox, Dolly Wheel, and U-Joint Lubrication

Tractor PTO Gearbox Lubrication

Checking Gearbox Oil Level

Check the gearbo x oil le vel every 25 hours, an d if necessary, add oil [SAE E.P. (Extreme Pressure) 90W gear lube] to maintain oil level to the FULL mark on the dipstick.

IMPORTANT: DO NOT overfill the PTO gearbox to avoid oil leakage out of the dipstick standpipe.

If the oil level is low, check the gearbox for any indication of an oil leak. If an oil leak is noted, the gearbox will need to be removed and rebuilt.

Level Plug

1. Remove the drain plug in the bottom of the gearcase, drain the oil, and reinstall the plug.

2. Refill the gearbox through the dipstick standpipe using 7 to 8 fl. oz. (21 to 24 cl) of SAE E.P. (Extreme Pressure) 90W gear lube. Remove plug in top of gearcase to vent air when refilling.

3. Check that the oil level is at the FULL mark on the dipstick. DO NOT overfill.

Gear Axle Lubrication

• The gear axle oil lubrication is SAE 80W-90 (API

GL-5) gear lube.

• Check the axle oil level after every 100 hours of

operation by removing the oil level plug. If additional oil is needed, remove the breather vent on top of axle and fill until oil is at the level plug.

• Change axle oil every 1000 hours or two (2)

years.

Maintenance Instructions LUBRICATION

Hydrostatic Transmission Fluid

Checking Hydrostatic Transmission Fluid Level

Hydrostatic transmission fluid level should be checked every 25 hours of machine operation. It is preferable to check the fluid level when fluid is cold. Check fluid level as follows:

1. Park the mower on a level surface. St op t h e engine and wipe dirt and contaminants from around the reservoir cap and air bleed plug.

IMPORTANT: Before removing the reservoir cap, clean any dirt from around it. Any dirt or contaminants entering the transmission will accelerate wear and eventually cause loss of power to the drive wheels.

2. Remove the reservoir cap and ch eck the level of the fluid. The reservoir has a fluid level COLD mark and HOT mark. The reservoir oil level

should ALWAYS be at or above the COLD mark and NEVER above the HOT mark.

Reservoir Cap

Hot Level

b. If no fluid leaks from aro und the air bleed

plug: * Slowly add fluid into the reser voir until

fluid starts to leak from around the plug. (Transmissions are serviced from the factory with Mobil 1 (15W50) Synthetic Oil. When it is necessary to add flui d, refer to Specifications for the proper fluid.)

* As soon as there is fluid leaking from

around the air bleed plug, tighten the plug and fill the reservoir to the COLD level mark. Wipe any excess oil off of the transmission housing.

IMPORTANT: DO NOT overfill the transmission reservoir . This will result in oil leaking out of the reservoir cap vent when the transmission warms up. It is preferable to add fluid to the transmission when it is cold and make sure the oil is not above or be-

low the COLD level mark. IMPORTANT: The transmission reservoir has a fine

mesh screen in the bottom to trap dirt and foreign particles from entering the t ransmissio n. When fill ing the reservoir, fluid will flow quite slowly through this screen; so it is essential that there is fluid at the bleed plug before the transmission is considered full.

Cold Level

Air Bleed Plug

Transmission Reservoir

and Air Bleed Plug Location

3. If the fluid is below the COLD mark (or the transmission is not performing properly), loosen the air bleed plug (located on the top of transmission case next to the plastic reservoir).

a. If a small amount of fluid leaks from around

the air bleed plug: * The transmission is full of fluid.

* Tighten the plug and fill the reservoir t o

the COLD level mark.

IMPORTANT: Any attempt to remove or in any way alter the filtering screen in the transmission reservoir could cause damage to the transmission and will VOID any transmission warranty.

Changing Hydrostatic Transmission Fluid

The hydrostatic fluid should be changed every 1000 hours or two (2) years. Also, the fluid should be changed if the natural color of the fluid has become black or milky (indicating possible overheating

or water contamination of fluid). The transmission is refilled using the factory service fluid noted in TRANSMISSION Specifications. The fluid is changed as follows:

1. Park the mower on a level surface and stop the engine.

2. Remove the lower drain plug and the air bleed plug. Allow the fluid to drain out.

IMPORTANT: Clean any dirt from around the plugs and reservoir cap before removing them.

Maintenance Instructions LUBRICATION/CLEANING

3. Reinstall the lower drain plug, ma king sure th e rubber O-ring on the plug is in place and in

good condition.

4. Refill the transmission through the air bleed plug hole until it is as full as possible.

IMPORTANT: Avoid fluid contamination when filling the reservoir. Use clean container, spout, funnel, etc. when pouring the fluid into the reservoir.

5. Rotate the transmission input shaft about five (5) revolutions to allow any trapped air to escape.

Turbine

Precleaner

Air Restriction

Gauge

6. Before installing the air bleed plug, fill the reservoir with fluid allowi ng a small amount to leak out of the air bleed plug hole.

7. Install the air bleed plug and fill the reservoir to the COLD level line.

CLEANING Engine Air Cleaner System

There are two main compo nents in the engine air cleaner system: a turbine precleaner and a Donaldson Radialseal™ a ir cleaner. Each component is checked, cleaned and maintained on a different schedule based on the filtering action required. Each component is serviced as follows:

Air Cleaner

Cartridge

Donaldson Air

Cleaner Cover

Precleaner

Tube

Air Intake

Hose

Vacuator™

Valve

Safety

Filter

Donaldson Air

Cleaner

Hose

Clamp

Engine

Engine Air Cleaner System Components

Maintenance Instructions CLEANING

Turbine Precleaner

The turbine pr ecleaner is mounted o n a remote air intake tube connected to the Donaldson air cleaner. A spinning fan driven by the intake airflow separates dust from the air, giving the initial stage of air cleaning. Dust particles are exhau sted through a singl e small vent in the side of the housing. Since no dust is trapped, the precle aner operates without cleaning. The only maintenance required is to check the operation of the internal fan every 100 hours. Verify operation:

1. Look into the exh aust v ent whi le sh ini ng a l igh t into the intake.

2. Start the engine and watch the fan begin to spin as the throttle is advanced.

If the fan is not spinning, service or replace the precleaner as required.

Donaldson Radialseal™ Air Cleaner

A remote mounted Donaldson Radialseal™ air cleaner provides the air filtering function. The paper filter element slides over an outlet tube inside the air cleaner canister with radial sealing action, eliminating the possibility of dust leaks due to improper filter installation. Intake design, internal baffling, and a Vacuator™ valve provide dust separation and automatic precleanin g action. Daily or frequ ent servicing of the air cleaner is not required. Use the air restriction gauge on the air cleaner outlet to indicate when the air filter needs serv icing -- a red flag will appear when the filter is overly restricting airflow into the engine.

Cover

Canister

Vacuator™

Valve

Radialseal™

Filter Element

Cover Latch

Air Cleaner Components

(shown with cover being removed)

IMPORTANT: The Donaldson air cleaner uses a dry

paper- type air fi lter ele ment. NEVER apply oil to the paper element.

Push Button to Reset

Indicator After Service

Air Restriction

Gauge

IMPORTANT: Use only Donaldson air filter elements for replacement (Donaldson P822686 or Walker 5090-1). Aftermarket filters may not seal properly or filter efficiently.

Air Restriction Gauge Location

Clean and insp ect the paper element after every 100 hours of service and replace the el ement and

safety filter yearly or after six (6) cleanings (or when dirty or damaged). More frequent cleaning may be required when operating in extremely dusty conditions as indicated by the air restrictio n gauge. Service the air cleaner as follows:

Maintenance Instructions CLEANING

1. Release the top and bo ttom cover latc hes and remove the air cleaner cover. Wash the cover and Vacuator™ valve. Check that these components are in good condition. The V acuator™ valve is subject to wear and deterioration and should be replaced yearly or when damaged . The lips of the valve should close and fit together; any cracks, deformation, or wear in the valve is cause for replacement.

2. Remove the filter element by pulling it out of the canister. There will be some initial resistance as the filter seal break s loose and slide s off of the outlet tube. Gently move the end of the filter up and down and side to side or twist to loosen the seal. Use gentle action to minimize the amount of dust dislodged as the filter is removed.

3. Clean the filter element using low pressure compressed air [less than 100 PSI (689 kPa )]. Blow out the filter from th e interior of the element while turning the element.

NOTE: Washing the element in water or cleaning solution is not recom mend ed. Rep lace the element if it does not clean up with compressed air.

4. Use a bright light inside the element to inspect for damage. Check the e lement very ca refully for pin holes or other damage that will allow dirt to leak through the paper me dia. Replace element if necessary.

5. Without removing, visually inspect the condition of the safety filter for damage or holes. The safety filter sho uld only be remo ved for yearly replacement (or when dirty or damaged).

6. Check the condition and resilience of the radial sealing surfac e (inside o f the open end) of th e filter. Replace the filter if any cracks, tears, or other damage to the sealing surface are noted.

9. Insert and seat th e filter elemen t carefully into the canister, applying pressure at th e outer rim of the filter; not at the flexible center. Make sure the filter element i s completely in place before installing the cover.

IMPORTANT: DO NOT use the cover latches to force the filter into the canister -- the cover should fit on with no extra force.

NOTE: DO NOT use petroleum based lubricants on the sealing surf aces of the filter; use t alcum powder or dry silicone lubricants if required for filter installation.

Canister

Safety Filter

Outlet Tube

Radial Sealing

Air Filter Element Replacement

10. Ins tall the cover with the word “TOP” properly oriented to the top of the canister. Give the cover a slight twist as it reaches the canister to make sure the tab inside the cover goe s into a slot, otherwise the cover will not fit properly. Make sure both the top and bottom cover latches are securing the cover in place.

Cover Latch

Radialseal™

Filter Element

Surface

Orient to Top

of Canister

7. Use a clean, damp cloth and wipe the interior of the air cleaner canister clean. Use special care to clean both the inside and outside surfaces of the outlet tube.

IMPORTANT: Any dust left on the inside of the outlet tube will go into the engine and cause wear.

8. Check the outside surface of the outlet tube for smoothness and cleann ess (this is the seal ing surface).

Vacuator™

Valve

Proper Orientation of Air Cleaner Cover

11. Che ck the air intake hose for cuts, nicks, etc., and the hose clamps for tightness.

12. Res et the air restric tion indicator (press button on top).

Cover Latch

Maintenance Instructions CLEANING

Engine Cooling System - MT20 and MTEFI

Air Intake System

To pr ev en t engine ov er he ati ng an d poss ibl e eng in e damage, clean gr ass clippin gs, chaff, and dir t from the rotating engine air in take screen after every 8 hours of operation. In certain mowing conditions (dry grass, leaves, tree “cotton”, etc.), it may be necessary to check and clean the screen several times each day to prevent engine overheating.

CAUTION

Engine Cooling

Fin Access Panels

Kohler Engine

Shroud

Engine Air

Intake Screen

Operating the engine with a blocked air intake screen, dirty or plugged cooling fins, and/or cooling shrouds removed will cause engine damage from overheating.

Cylinder Head Cooling Fins

It is essentia l for performance and longevity of th e air-cooled engi ne to keep the cylinder h ead c ool in g fins clean and free of obstruction. After every 8 hours of operation, check the perf ormance of the cooling system by starting the engine, holding a hand adjacent to the c ylinder hea d, and feeling th e cooling airf low . If there is littl e or no airflow , clea n the cooling fins as described below.

DANGER

Make sure to keep hands clear of exhaust pipe, muffler, and moving parts when checking airflow.

Every 100 hours, inspect and clean the cooling fins

(more often when operating in extremely dusty, dirty conditions). R emo ve the two (2 ) co o ling fin access panels in the engine shr oud and clean the coolin g fins and external surfaces using compressed air. Make sure to reinstall the a cces s panels befo re operating the engine.

Engine Air Intake Screen

and Cooling Fin Access Panels

Check Airflow

with Hand

Cylinder

Head

Cooling System Airflow

Engine Cooling System - MTL

Radiator Screen and Cooling Fins

To p revent the en gine from overheating and possible engine damage, clean grass clippings, chaff, and dirt from the f ine mesh radiator intake screen daily. In certain mowing conditions (dry grass, leaves, tree “cotton” , etc.), it may be necessary to check and clean the screen several times during use to prevent engine overheating.

1. Remove the screen. T o clean the screen, wash with soapy water or bl ow out with compr essed air.

Maintenance Instructions CLEANING

2. Inspect the radiator cooling fins for material lodged in this area which would rest rict coolin g airflow. Use pressurized air or wat er to clean.

DO NOT use any tool, like a screwdriver or knife, to c lean material out of the fins as this

may damage the cooling fins. DO NOT use cold water on a hot radiator.

NOTE: Directing pressurized air or water from the fan side of the radiator outward is recommended to dislodge material packed on the outside of the cooling fins. DO NOT use cold water on a hot radiator.

WARNING

Radiator and engin e part s can be come extremely hot during operation. Wear gloves and avoid touching hot parts while cleaning the radiator screen and cleaning debris away from the engine and cooling system.

Flushing Radiator and Changing Coolant

IMPORTANT: Maintain prope r coolant level in the radiator and coolant recovery tank. The coolant level should be maintain ed between FULL and LOW marks on the coolan t recovery tank. Recheck the coolant level after the first time the engine has been operated after filling the coolant system (it would be normal to add a little coolant after initial operation).

Grass Buildup in Mower Housing

DANGER

Before raising or removing the mower deck for cleaning, stop the engine, remove the ignition key , and disconnect the spark plug wires.

1. Raise the dec k lock lever handle on e ach side of the carrier frame and pull out to release carrier frame for tilting action.

2. Using the carrier frame lift handle, raise deck to the TILT-UP posi tion and inser t the deck hook into the tilt-up latch on the tractor body.

Change engine coolant every year. Drain the coolant from the engine and radiator:

1. Remove the radiator cap.

2. Open the drain cocks on the engine blo ck and radiator (see the Kohler Owner’s Manual for location of the drain cocks). Also, drain the coolant recovery tank.

3. If there is any indication of deposits or scaling inside the radiator, use a commerci al scale remover and flush the cooling system thoroughly before adding fresh coolant.

Use a pre-mixed 50/50 solution of antifreeze (ethylene glycol) and distilled water to refill the cooling system.

IMPORTANT: The solut ion of a ntifre eze and wa ter must be thoroughly pre-mixed before putting it in the engine. Adding pure antifreeze into the radiator may cause damage to the engine from overheating.

Tilt-Up Latch

Tilt-Up Hook

on Deck

Deck Lock Lever

Deck Secured in TILT-UP Position

DANGER

Do not operate the mower with deck in tiltup position. Do not move t he tra ctor with the deck in the tilt-up position.

3. Clean grass buildup underneath the deck using a pressure washer (and scraper if required).

Maintenance Instructions CLEANING

NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point is finally reached where cutting quality

deteriorates and clogging begins to occur

because of too much buildup on the b affling and housing.

4. Lower the deck to the normal operating position and re-engage the deck lock levers.

CAUTION

Do not operate machine with deck tilt-up pivot joint unlocked.

GHS Blower

Normally, the GHS blower operates with no maintenance or cleanin g. However, when mowing grass that is dirty and damp (especially spri ngtime mo wing), a deposit of dirt may accumulate inside the blower housing, causing wear and binding of the blower wheel. W hen op erati ng in thes e co ndi tio ns ,

inspect the blower frequently for dirt buildup. NOTE: A visual clue of binding of the blower wheel

is the blower blade tips are polished from rubbing on dirt.

IMPORTANT: With the belt removed, the blower wheel must spin freely. Any binding or drag- ging of the wheel is an indication of dirt buildup. This buildup must be cleaned to avoid abrasive wear of the blower blades, excessive power loss and eventual loss of blower performance (clogging).

2. Use a pressure washer or water spray, and direct the spray inside the blower housing against the blower blades. Water pressure will cause the blower wheel to begin to spin and the combination of spinning ac tio n and water will effectively wash th e inside of the housi ng. Spra y may be directed against the blower blades vertically and horizontally to cause rotation in both directions for thorough washing action. W ash blow- er until the blower wheel spins freely in both directions.

3. Reinstall the GHS blower drive belt by reversing the removal procedure.

GHS Blower

Drive Belt

Blower

Drive Pulley

Blower

Pulley

When a dirt deposit is found, use a high pressure washer or water spray to clean the inside of the housing as follows:

DANGER

Before attempting to wash the blower, stop the engine, remove the ignition key, and disconnect the spark plug wires.

1. Remove the GHS blower drive belt tension by depressing the idler pulley on the tightener arm. Roll the belt off the blower pulley. The belt should be cle ar of the blower pulley, allowing free movement of the blower wheel.

Depress Idl er Pulley

Down to Relax Belt

Belt Tightener

Idler Pulley

Collapse Blower Belt Tightener

to Remove GHS Blower Drive Belt

GHS Exhaust Screen

Refer to Cleaning the GHS Exhaust Screen in Operating Instructions.

Maintenance Instructions

CLEANING/

CHECKING/SERVICING

Hydrostatic Transmission Cooling Fins

Keeping the cooling fins on the hydrostatic transmissions clean and free of obstruction is essential to avoid overheating the transmission fluid and shortening transmission life. The cooling fins should be checked every 100 hours; and cleaned if necessary.

T o clean the fins, use compressed air and/or a pressure washer. The cooling fins extend all the way around the housing -- the fins underneath need to be clean as well as the more vi sible fins ab ove. Also, pay close attention to the area under the drive pulley.

IMPORTANT: In case an oil leak dev elops on the input shaft, the cooling fan blowing du sty ai r and oil on the transmission will quickly pack the cooling fins with oily dirt. If this condition occ urs, replace the seal immediately to avoid overheating and damaging the transm ission. The in put shaft assembly and seal are easily re placed without removing the transmission from the machi ne.

An additional procedure in maintaining transmission cooling is to inspect t he cooling fans. Replace the fan(s) if blades are missing or damaged.

CHECKING/SERVICING

DANGER

To prevent accidental starting of the engine when servicing or adjusting th e machine, remove the key from the ignition switch and disconnect the spark plug wires.

Engine Cooling System - MTL

Coolant Level

WARNING

NEVER remove the radiator p ress ur e ca p when the engine is hot — hot water could spray and cause a burn if the cap is taken off too soon.

Cooling Fan

Cooling Fins

Hydrostatic Transmission Cooling Fins

Recovery Tank

Model MTL Overflow Tank

Check the cool ant le vel in the co olan t reco very t a nk and maintain the coolant level between the FULL and LOW marks on the recovery tank. When the engine is cold, the coolant level should be at or slightly above the LOW mark on the recovery tank.

If the coolant level is low, remove the radiator cap and fill to the overflow por t level and then fil l the recovery tank above the LOW mark. Use a pre-mixe d 50/50 solution of antifreeze (ethylene glycol) and distilled water to fill the cooling system.

Maintenance Instructions CHECKING/SERVICING

IMPORTANT: The coolant solution of antifreeze and distilled water must be thoroughly pre-mixed before putting it in the engi ne (adding pure an tifreez e into the radiator may cause damage to the engine by causing overheating).

Important Battery Service, Inst allation , and Changing Tip s for MT EF I:

CAUTION

Security of Air Filtration Components NOTE: The fol lowing inspection is only an ex ter-

nal inspection and should be done without “disturbing” the filtration components.

On a daily basis, visually inspect the external condition of the complete air cleaner system. The following items should be inspected:

1. Check the Donaldson Radia lseal™ air cleaner canister for damage . Make su re the co ver is in place and the cover latches are secure - do not run the engine withou t the air cleaner c over in place and secure.

2. Inspect both air intake hoses for cracks, nicks, cuts, etc., and check the ho se c lam ps fo r tig htness.

Battery NOTE: For initial bat tery service during se tup, re-

fer to Battery Service in Asse mbly Instructions. IMPORTANT: Make sure battery is securely mount-

ed in the frame. A loose battery may cause damage to the case resulting in acid leakage and severe damage to the machine. A haz ard may be created by damage to critical working parts and safety systems.

• Do not allo w the ba tte ry cab les to to uch

opposing terminals. When connecting battery cables attach the po sitive ( +) cab le to positive (+) battery terminal first, followed by negative (-) cable to negative (-) battery terminal.

• Never start the engine when the c ables

are loose or poorly connected to the battery terminals.

• Never disconnect battery while engine is

running.

• Never use a quick battery charger to

start the engine.

• Never "jump start" the engine using

another source. Electricity fluctuations can damage the ECU (Electronic Control Unit).

• Do not charge battery with key switch

"on."

• Always disconnect negative (-) battery

cable lead before charging battery, and also unplug harness from ECU before performing any welding on equipment.

Electrolyte Level

The battery electrolyt e level shoul d be checked after every 25 hours of ope ra tio n. To check electro-

lyte level:

1. Remove battery cell filler caps.

2. Check the electrolyte level. If the level is below the bottom of the vent well, fill with drinking water to the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above the plates].

3. Replace filler caps.

IMPORTANT: DO NOT overfill the battery. Electrolyte will overflow through the vented caps onto parts of the machine and WILL result in severe corrosion.

Maintenance Instructions CHECKING/SERVICING

Cleaning the Terminals

If battery terminal s are corroded, remove battery from the mower. Using a wire brush, remove corrosion with a solution of one part baking soda and four parts wat er. Rinse with clean water. Coat the terminals with p etroleum jelly or ter minal protector spray to retard further corrosion.

Charging the Battery

Check the battery charge by measuring the specific gravity of elec trolyte; if specif ic gravity is l ess than

1.225, the battery will need to be charged as follows:

1. Charge the battery at 15 amps for 10 minutes . DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific gravity is at least 1.250. Total charging time should not exceed one (1) hour.

2. After charging the battery, use drinking water to adjust the electr olyte lev el to the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above the plates].

Wheel Bolt Torque

Check eve ry 100 hours the eigh t (8) lug bolts that mount the drive tires. They sh ould be tor qu ed to 75 to 85 ft-lb.

Sharpen Mower Blades Check mower blade(s) for straightness, sharp-

ness, condition of the cutting edge, and balance every 10 hours of operation ( or more often when

mowing abrasive typ e grass or operat ing on sandy soils). Replace blades if worn, bent, cracked, o r

otherwise damaged (refer to REPLACING/REPAIRING the Mower Blades in this section). Use the

following procedure to check and sharpen blades: NOTE: Keep blades sharp - cutting with dull

blades not only yiel ds a p oor mowin g job b ut slo ws the cutting speed of the mower and causes extra wear on the engine and blade drive by pulling hard.

1. Stop the engine, remove ig nition key, and disconnect the spark plug wires before raising the mower deck to service blades.

DANGER

BATTERIES PRODUCE EXPLOSIVE GASES

• Charge the battery in a well-v entilated

area, so that gases produced while charging can dissipate.

• Keep sparks, flames, and smoking ma-

terials away from the battery at all times.

• Make sure the battery cap vents are open

(check manifold vent on each cap).

• Make sure the battery charger is un-

plugged before connecting or disconnecting cables to the battery.

Tire Pressure

Inflate tires to pressures shown below: Deck Caster Wheel = 20 PSI (137 kPa)

Drive = 15 PSI (103 kPa) Rear = 20 PSI (137 kPa)

2. Raise the deck and secure it in the TILT-UP po- sition. Refer to CLEANING the Grass Buildup in Mower Housing in this section for deck rais ing instructions.

DANGER

NEVER operate cutter blades with the deck in the raised position.

3. Check the blades for straightness by m arking the blade tip position ins ide the deck housing, and then rotating the opposite end of the blade to the same position and comparing . If the difference in blade tip track is more than 1/8 in.

(3 mm), the blade is bent and should be replaced.

Maintenance Instructions CHECKING/SERVICING

6. Check blade balanc e by positioning the bl ade

WARNING

DO NOT try to straigh ten a blade that is bent. NEVER weld a broken or cr acked blade. ALWAYS replace with a new blade to assure safety.

4. If the blade cutting edge is dull or nicked, it should be sharpened. Remove blades for sharpening by grasping the end of the blade using a rag or a thick, padded glove, while loosening and removing the nut, lock washer, and flat washer that mounts the blade.

5. Grind cutting edge at the same bevel as the original. Sharpen only the top of the cutting edge to maintain sharpness.

NOTE: Blades can be sharpened with an electric blade sharpener , conventional electric grinder, or a hand file.

horizontally on a blade balancer or use a nail or shaft through the center hole. If either end of the blade rotates downward, grin d (remove) metal on that end until the blade will balance. The blade is properly balanced when neither end drops. Balance of a blade is generally maintained by removing an equal amount of material from each end of the blade when sharpening.

Blade Balancer

CAUTION

ALWAYS wear eye protection and gloves when sharpening a blade.

Sharpen at

Original 30° Angle

30°

Sharpen on Underside

Mower Blade Profile For Sharpening

Intersection

Wear Area

Wing

Do Not Grind or

Tip

Blade Balanced on Magnetic

Wall-Mounted Balancer

7. Mount the blade with wing ti ps pointing up into the housing. Reins tall the blade, was her, lock washer, and nut. Tighten the nut to 60 ft-lb

(81.3 N

NOTE: When reinstalling blades on GHS models,

remember, the blades turn toward each other (counter-rotate) and the RH and LH blade cannot be switched. Check for proper blade rotation before installing blades on the d eck. Refer to Blade Rota-

tion for GHS Mower Deck illustration shown in Clogging Checklist in Operating Instructions for

correct blade rotation.

Drive Belts

Raise the body and inspect the condition of the four (4) belts (3 belts on SD models) every 25 hours of operation - engine PTO drive, jackshaft drive, hydrostatic ground drive, and GHS blower drive. If the belts show signs of cracking or deteriorating, the belts should be replaced. Refer to REPLACING/ REPAIRING the Drive Belts in this section.

⋅m).

Maintenance Instructions CHECKING/SERVICING

Mower Deck Gearbox Oil Seals

The mower deck gearbox seals should be inspected

every 25 hours for evidence of oil leaking; particularly the lower oil seal on the blad e drive gearbox. This seal is protected by the trash guard on the

blade hub and seal prot ector plate o n the ho using, but is still vulnerable to se al damag e due to op er ating in an adverse envi ronment. The mower bl ade must be removed for ins pection of the s eal, so it is recommended to inspect the gearbox seals when blades are removed for sharpening. If an oil leak is noted, the seal should be repl aced and the gearbox assembly relubricated. Refer to Mower Deck

Gearbox Lubrication in this section. Spark Plugs Every 200 hours of operation, remove the spark

plugs, inspect, c lean, and r eset the g ap (or repl ace with new plugs). Before removing the spark plugs, clean the area around the base of the plugs to keep dirt and debris out of the eng ine . Clea n spark pl ugs with a wire brush. DO NOT use an abrasive grit type cleaner. If the electrodes are burned short or pitted, replace plugs with Champion MTEFI (or equiv alent)] or RC14YC [MTL (or equiv alent)]. Chec k spark plug gap with a wire -type feele r gauge and set the gap a t 0.030 in. ( .76 mm ). Reinstall and tighten to between 18 and 22 ft-lb (24.4 to

29.8 N

⋅m).

Ignition Wires Good preventive maintenance calls for complete re-

placement of spark plug wires every two (2) years. Fuel Lines and Clamps



type RC12YC [MT &

Radiator Hoses and Clamps - MTL

Inspect the radiator ho se s every 200 hours for deterioration or damage. Also ch eck the tightness of the hose clamps. Good preventive maintenance calls for complete replacement of the radiator hoses and clamps every two (2) years.

Engine Starter Yearly or every 500 hours disassemble and clean

the solenoid shift starter. Refer to the Kohler Service Manual for this proced ure or contact an authorized Kohler engine dealer to perform this service.

Blade Brake Action

WARNING

It is important to check and maint ain blade brake action for safe operation of the machine.

Check the function of the cutter blade br ake (and blower brake on GHS models) by engaging the blade clutch (PTO), operating the engine at full throttle, then disengaging the c lutch and measu ring how quic kly the blades stop. Watch the rotation of the blade drive shaft and blower pu lley as a visual indicatio n that movement has stopped. If the brake is working

properly , all rotation w ill stop five (5) seconds after disengagement of the clutch. If the br ake sys -

tem malfunctions - blades do not stop in five (5) seconds - adjust or r epair th e brake bef ore operat ing the mower. Refer to ADJUSTMENTS of Blade

Clutch (PTO) in this section.

NOTE: The MTEFI system is pressurized and

should be serviced by a Walker dealer or Authorized Kohler engine service outlet.

Every year, inspect the fuel supply line from the tank to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness. Good preventive maintenance ca lls for comp lete replacement of fuel lines and clamps every two (2) years.

PTO U-Joints

The PTO U-joints should be inspected yearly for looseness and wear. If either is noticed, the respective shaft or tube should be replaced. A worn U-joint can cause vibration and extensive damage to the PTO and deck gearboxes.

Maintenance Instructions REPLACING/REPAIRING

REPLACING/REPAIRING

DANGER

To prevent accidental starting of the engine when replacing parts or repa iring the machine, remove the key from the ignition switch and disconnect the spark plug wires.

IMPORTANT: ALWAYS use genuine factory re-

placement parts. Substitute parts CAN result in product malfunction and possible injury to the operator and/or others.

Jackshaft

Drive Belt

Drive Belts

There are four (4) individual belts on GHS models or three (3) belts on SD models:

• Jackshaft Drive Belt

• Engine PTO Drive Belt (3 Groove Power Band)

• GHS Blower Drive Belt (GHS Model Only)

• Hydrostatic Ground Drive Belt

The belts may be removed and re placed using the

procedures described on the following pages.

Hydrostatic Ground

Drive Belt

Engine PTO

Belt

GHS Blower Belt

(GHS Model Only )

Belt Locations

Maintenance Instructions REPLACING/REPAIRING

Engine PTO Drive Belt (3 Groove Power Band)

1. To remove the engine PTO drive belt: a. Remove the jackshaft drive belt from its

idler pulley (by pushi ng down on idler pulley) and let the belt drop down out of the way.

NOTE: Step (a) is not essential to removing the PTO belt, but it makes more room to work with the PTO belt.

b. Push the clutch i dl er pu ll ey do wn (u n til th e

PTO belt tightener stop block contacts the frame) and then shift the b elt off the idler pulley (to the inside).

Pull UP to Engage

c. Raise the clutc h lever (e ngage pos ition ) to

lift the clutch idler away from the belt.

d. Next remove the belt from the engin e pul-

ley and then the PTO drive pulley.

2. Install the PTO drive belt by reversing th e removal procedure.

IMPORTANT: Make sure the belt is installed inside the four (4) belt guide pins.

Refer to ADJUSTMENTS of Blade Clutch (PTO) in this section to check and make the fol-

lowing adjustments: a. Clutch engagement for proper belt tension. b. Clutch disengagement and brake action.

Clutch

Linkage

PTO Belt Tightener

Stop Block

PTO Belt

Tightener Arm

Blade Clutch Lever

in the DOWN Position

Belt Guides

(Bottom Guide Not Visible)

Engine

PTO Belt

Belt

Guide

Engine

Pulley

Clutch Idler

Pulley

Belt

Guide

PTO Drive

Pulley

Micro-V Pulley

(GHS Blower Drive)

Engine PTO Drive Belt Removal

Maintenance Instructions REPLACING/REPAIRING

Jackshaft Drive Belt

1. To remove the jackshaft drive belt: a. Remove the engine PTO drive belt, as

described in previous section.

Push Idler Pulley D own to Relax Belt

Jackshaft

Drive Belt

Tension Spring

b. Relax the belt by depressing the spring-

loaded idler arm.

c. Roll the belt off the jackshaft pulley and

remove.

Idler Pulley

Engine

Pulley

Jackshaft Drive Belt (Disengaged)

2. Reverse the removal procedure to replace the jackshaft drive belt.

Idler Arm

Jackshaft

Drive Belt

Ten si on Spring

Jackshaft Drive Belt (Engaged)

Engine

Pulley

Maintenance Instructions REPLACING/REPAIRING

GHS Blower Drive Belt

1. Remove the GHS blower drive belt tension by depressing the idler pulley on the tightener arm. Roll the belt off the blower pulley and remove.

Blower Drive

Pulley

Depress Idler Pulley

Down to Relax Belt

GHS Blower

Drive Belt

Blower

Pulley

GHS Blower Drive Belt Assembly (Disengaged)

Blower Drive Belt Spring Removal

2. Reverse the procedure to install the GHS blower drive belt.

Belt Tightener

Idler Pulley

(Engaged)

Belt Tightener

Idler Pulley

(Disengaged)

GHS Blower Drive Belt Assembly (Engaged)

Maintenance Instructions REPLACING/REPAIRING

Hydrostatic Ground Drive Belt

1. To remove the hydrostatic ground drive belt: a. Raise the spring-loade d belt tighten er arm

and idler pulley to relax belt.

Belt Tightener Arm

Idler Pulley

Hydrostatic

Ground Drive Belt

b. Slide belt off pulleys, then release the idler.

Jackshaft

Transmission

Drive Pulley

Spring

Hydrostatic Ground Drive Belt Assembly (Disengaged)

2. Reverse the procedure to install the hydrostatic ground drive belt.

Belt Tightener Arm

Idler Pulley

Hydrostatic

Ground Drive Belt

Spring

Hydrostatic Ground Drive Belt Assembly (Engaged)

Maintenance Instructions REPLACING/REPAIRING

Fuel Filter - Model MT and MTL

Models MT and MTL are each equipped with an i nline fuel filter. Visually inspect the filter p eriod ic al ly, and replace the filter yearly.

In-Line

Fuel Filter

Fuel Filter Location

IMPORTANT: Replace the fuel filter only in a clean

area where the fuel line and connections will not be contaminated by any dust and dirt.

DANGER

Fuel Filter - MTEFI

WARNING

The MTEFI fuel system operates under high pressure. This system should be serviced by a Walker dealer or authorized Kohler service dealer.

Model MTEFI is equipped with a high-volume, highpressure, 10-15 mi cron, in-line fuel filter. Replacement of this filter is recommended every 1500 hours of operation or more frequently under extremely dusty or dirty conditions. Because the MTEFI has a pressurized fuel system, fuel filter replacement should be done by a Walker dealer or authorized Kohler service dealer.

Blade Overload Shear Bolts NOTE: Shea r bolts are not used on the DSD52 o r

DSD62 mower deck. The cutting blade i s key ed to th e b lade hub by two

(2) shear bolts (10-24 x 5/8 in. stainless steel machine screws). T hese bolts are des igned to shear and protect the blade drive gearbox from damage if the blade encounters a shock load.

Gasoline is extremely flammable and can be highly explosive. To minimize danger:

• Use only an approved fuel container for

gasoline.

• DO NOT allow open flames or sparks

near the machine while perfo rming maintenance or refueling; DO NOT smoke while working with fuel.

• Wipe up spilled gasoline immediately

and completely.

1. Expand and slide clam ps on either side of the filter away from filter and pull fuel lines off filter.

2. Replace filter.

Cutting Blade

Shear Bolts

Cutting Blade Shear Bolts

NOTE: Tightening the 5/8-18 blade mounting nut to 60 ft-lb (81.3 N shock load protection . It is important to not overtighten the mounting nut since thi s defeats (over-

rides) the function of the shear bolts. If these bolts shear, remove the blade and install new

bolts. Refer to CHECKING/SERVICING in this section for Sharpen Mower Blades which describes the blade removal and installation procedure.

⋅m) is also important for proper

Maintenance Instructions REPLACING/REPAIRING

After reinstalling the blade, check blade timing by moving blades through one (1) comple te revolu- tion. Make sure blade tips pass clear of each other. If timing is incorrect, refer to Mower Deck Gearbox

Replacement in this section. PTO Shear Pin

The PTO drive shaft connection to the deck gearbox has a shear pin to pro vide shock l oad protecti on to the mower deck drive. This system provides prima- ry shock protection in case of blade impact and will normally shear before the individual shear bolts on the blade hub.

When the PTO pin has sh eared, use the followin g procedure to replace it:

1. Loosen the two bolts securing the PTO shaft guard on the deck; lift the guard off. (Holes in guard are slotted for easy removal.)

2. Rotate U-joint on shaft to align the shear pin hole with the hole (and s hear pin fragment) in the shaft. Use a punch to drive the rem aining portion of the old shear pin out.

3. Install new shear pin and secure with cotter pin.

Split Spring Pin

(Retains U-Joint Held on Shaft

with Broken Shear Pin)

Shear Pin

Before operating the deck , inspect the blade overload shear bolts and also check blade timing (on gear driven decks) by moving blades through one (1) complete revolution. Ma ke sure blade tips pass clear of each other. If timing is incorrect, refe r to

Mower Deck Gearbox Replacement in this section. Mower Blades

Mower blades are remov ed and remounted as described in Sharpen Mower Blades instructions. During the course of sharpening and inspecting mower blades, if there are any of the following con-

ditions of wear or damage, blades should be replaced for reasons of safety and performance of the

machine:

• An ex cessive amount of the flat secti on of the

blade has been ground away (remov ed) when the blade is sharpene d. Replace the blade when l ess than a 3/4 in. (19 mm) flat section remains at the blade tip.

• Exam ine ends of the blade carefully, especiall y

the intersection where th e flat section of the bl ade turns up to form the “wing tip” (refer to Mower Blade

Profile for Sharpening illustration in Sharpen Mower Blades instru ctions). S ince sand an d abra-

sive material can wear me tal away in this area , the blade should be replaced when metal thickness

has worn to 1/16 in. (1.6 mm) or less.

U-Joint

Tube Assembly

U-Joint

Shaft Assembly

Cotter Pin

PTO Shear Pin

IMPORTANT: Use only Walker P/N 8067-13

shear pins for replacement to provide proper shock protection -- these pins are hardened to shear under a specific amount of load.

4. Reinstall the PTO shaft guard.

DANGER

When blades are operated over sandy soil, and if blades are allowed to wear, a “slot” may be worn into the wing tip of blade. Eventually a piece of the blade may break off creating a se rious potential for injury or damage.

• Check the blades for straightness by marking

blade tip position inside the deck ho using and t hen rotating the opposite en d of the blade to the same position and comparing. If the difference in blade tip track is more than 1/8 in. (3 mm), the blade is bent and should be replaced.

• Inspect the blade surface, especially in formed

areas, for cracks. Replace the b lade if any cracks are found.

Maintenance Instructions REPLACING/REPAIRING

NOTE: With oil flow throughout the unitized

WARNING

DO NOT try to straigh ten a blade that is bent. NEVER weld a broken or cr acked blade. ALWAYS replace with a new blade to assure safety.

gear drive assembly; if one gearbox has internal damage or excessive wear, the remaining gearboxes and connector tubes should be completely disassembled and thoroughly flushed out with solvent before reassembly.

5. Drain and properly dispose of oil.

Reinstall the blades following procedure in

CHECKING/SERVICING for Sharpen Mower Blades instructions. If blades are replaced, always

use Walker original equipment blades to ensure safety and optimum perfor mance. The quality an d performance of replacement blades offered by

other manufacturers cannot be guaranteed, they could be dangerous.

CAUTION

ALW A YS use genuine factory replacement part s. Substitute parts CAN result in product malfunction and possible injury to the operator.

Mower Deck Gearbox Replacement NOTE: Deck gearbox(es) may be changed with

the deck mounted on the tractor. However , the deck may be removed from the tractor making the overall job of removing the gearbox assembly easier. Refer to Deck Install at ion in Assembly Instructions and reverse the procedure to remove the deck.

T o replace the mower deck gearbox(es), use the following procedure:

1. Remove mower blades. Refer to pr ocedure i n

CHECKING/SERVICING for Sharpen Mower Blade instructions.

2. Remove gearbox cover (two machine screws) and PTO shaft guard (two 1/4-20 bolts).

3. Remove two (2) 3/8-16 mounting bolts from each blade drive gearbox and lift the entire gearbox assembly from the deck (including PTO drive shaft).

6. Remove the four (4) bolts mounting the gearbox to the connector tub e an d s lide the gearbox off the splined drive shaft coupling.

7. Install the new gearbox on the spline coupli ng of the drive shaft. Establish correct timing of the blade drive gearboxes by setting flats on the output shaft at 90 degrees when connecting the gearbox(es) to the spline coupling. Make sure the timing is correct before proceeding with assembly.

8. Reinstall the four (4) bolts mounting the gearbox to the connector tube but do not tighten them at this time; leave con nector tube bolts fingertight.

9. Position the gear drive assembly on the deck and install the 3/8-16 b olts mounting t he entire assembly. Leave the mount bolts finger-tight.

10. Torque all the connector tube bol ts to 80 in-lb

⋅m); then tighten the deck mount bolts.

(9 N NOTE: This fastener tightening sequence aligns

the gearbox as sembly with the deck housing and eliminates the possibility of mounting the unitized assembly in a bind.

1 1. Fill gearbox assembly with oil. Refer to LUBRI-

CATION for Mower Deck Gearbox Lubrication in this section for instructions.

12. Reassemble remaining items onto deck to complete installation. Aft er in stall ing bl ade s, c hec k that the blade timing is correct by moving the blades through one (1 ) complete revolu tion. Make sure blade tips pass clear of each other.

4. Remove the screws securing the cover plates on the gearboxes an d rem ov e the cov er s. Remove all covers to be sure oil is completely drained from all gearboxes.

Maintenance Instructions REPLACING/REPAIRING

Mower Deck

Gearboxes

Connector Tubes

Mower Deck Gearboxes

(Shown with Gearbox Cover Removed for Clarity)

GHS Blower Assembly (and/or Blower Wheel)

GHS Blower Assembly Removal

1. Remove the mower deck. Refer to Deck I nstallation in Assembly Instructions and reverse the

procedure to remove the deck.

4. Remove the blower assem bly fr om th e ch as sis as follows:

a. Remove the blower skid bar by removing

front and rear mounting bolts from the skid bar (underneath the blow er) and remo ving the bolt connecti ng the blower housing to the skid bar.

b. Remove the blower belt tightener idler arm

assembly by removing the pivot bolt.

c. Remove two (2) bolts mounting t he bl owe r

housing to the frame.

d. Lower the blower assembly straight down

out of the chassis frame and remove.

Blower Wheel Removal

When required, replace th e blower wheel using the following procedure:

1. Loosen blower pulley s et screws and remove the pulley using a wheel puller.

Skid Bar Mounting Bolts

Blower Assembly

Remove Skid Bar for

GHS Blower Removal

2. Remove the blower facepl ate by removing six (6) 1/4-20 nuts.

3. Remove the GHS blower drive belt. Refer to REPLACING/REPAIRING the Drive Belts in this section for instructions.

Skid Bar

2. Remove the locking collar from the back bearing (closest to the p ulley) by lo osening the set screw and rotating the col lar cou nterclo ckwis e (use punch to drive).

3. Press blower wheel out of th e housing using a wheel puller hooked to lugs on the bearing housing. The bearings have been secured in the housing with a retaining compound - Loctite RC/680, and considerable force will be required to break this bond. After the bearing s have “broken loose” from the housing, only light pressure should be required to remove the wheel assembly out of the housing.

NOTE: It may or may not be possible to remove the front bearing from the blower wheel without damaging it. If the bearing is damaged, it will need to be replaced along with the wheel.

Maintenance Instructions REPLACING/REPAIRING

Blower Wheel Installation

1. T o install the blower wheel, reverse the removal procedures. The front bearing is mounted

on the blower wheel shaft, secured by a locking collar. Drive the lo ck in g c oll ar cl oc k wis e wi th a punch, and tighten the set screw.

Wheel Puller

Hooked to Lugs

on Bearing Housing

Pressing Blower Wheel Out of Housing

Bearing (3/4)

2. Press blower wheel a nd front bearing into the blower housing. Use Loctite compound on the outer bearing race and inside the bearing housing.

3. Press the rear bearing into place, using Loctite on both the outer bearing race and the housing.

4. Install the locking collar on the rear bearing and install the blower pulley to co mpl ete the bl owe r assembly. Torque the blower pulley set screws to 250 in-lb (28.3 N

GHS Blower Assembly Installation

Reinstall the blow er asse mbly into t he m ower u sing the reverse procedures of GHS Blower Assembly Removal.

Blower Pulley

⋅m).

RC/680 retaining

5/16-18 x 5/8 SQH

Set Screw

5/16-18 x 3/4 SQH

Set Screw

Face Plate

Intake Tube

5/16-18 Whiz Locknut

Skid Bar

3/8-16 x 1 Hex Bolt

3/8-16 Keps Nut

3/16 x 3/16 x 1 Key

1/4-20 x 3/8

Set Screw

Housing

1/4-20 x 3/8

Set Screw

Blower Wheel

7/16-14 Hex Nut

7/16 Split Lock Washer

5/16-18 x 3/4 Hex Bolt

7/16-14 x 1-1/4 Hex Bolt

GHS Blower Components

Maintenance Instructions ADJUSTMENTS

ADJUSTMENTS

DANGER

If the engine must be running to perform a maintenance adjustment, keep hands, feet, and clothing from moving parts. DO NOT wear jewelry or loose clothing.

Safety Switches

There are three (3) safety inter lock swi tches on th e tractor; Seat Switch, FSC Neutral - Park Switch, and PTO Switch.

If any of the following condi tions o ccur du ring starting or operating, a s afety interlock switch may be malfunctioning. Contact you Walker deal er for troubleshooting and/or replacement.

Slight adjustments c an be m ade by c arefully bending the leaf switch up or down as needed.

• With an operator in the seat, the engine starts

with the Forward Speed Control (FSC) and/or the PTO engaged.

Steering Levers

An adjustment range of ap proximately 3 inches is available on the steerin g levers - the lev ers can be adjusted forward or aft depending on the arm length of the operator. The levers can be adjusted by loosening the locknut at th e pivot point and the lock nut holding the lever in position in the adjustment slide. Adjust levers into most comfortable position and tighten both locknuts.

Adjustment

Slide

Locknut

(Position)

Locknut

(Pivot Point)

• With an operator in the seat, the engine starts but

dies soon after the Forward Speed Control (FSC) or PTO is engaged.

• Without an operator on the seat, the engine

starts and continues to r un with th e For wa rd Speed Control (FSC) and/or PTO engaged.

• With an o perato r in the se at, the F orward Speed

Control (FSC) and PTO disengaged and panel horn works, but the starter is not engaging.

Tail Wheel Bearing Preload

Preload the tail wheel bearings by tightening the axle nut until the wheel begins to tighten as it turns (not spin freely), then loo sen the nut 1/2 to 1 turn. The wheel should spin freely without excessive end play. Lock the axle nut with the set screw in the nut.

Steering Lever Adjustment

Maintenance Instructions ADJUSTMENTS

Blade Clutch (PTO)

Clutch Engagement/Belt Tension

The clutch engagement and PTO belt tension are adjusted using the clutch actuator rod. Initially, after installing a new PTO belt, after 10 hours and every 100 hours thereafter, check and adjust for the two dimensions in the clutch actuator rod as shown in the

PTO Clutch Engaged and PTO Clutch Disen- gaged illustrations.

Clutch

Actuator Rod

Adjust the bolt head clearance [1/4 in. to 3/8 in. (6.35 mm to 9.53 mm)] fir st (clutch engaged), then adjust uncompressed spring length (clutch disengaged). The spring must be adjusted to an uncompressed overall length of 2-1/8 in. (54 mm). If adjustments are needed more frequently than every 100 hours to maintain the linkage dimensions, it may suggest problems with pulley wear or belt misalignment.

1/4 in. to 3/8 in.

(6.35 mm to 9.53 mm)

PTO Belt

Tightener Arm

Locknut

Spring

Compressed

Blade Clutch

Lever Engaged

PTO Clutch Engaged

Maintenance Instructions ADJUSTMENTS

Clutch Disengagement/Brake Action The declutched or disengaged position of the

blade clutch id ler pulley is adjustable and is set to

WARNING

It is important to check and maintain blade brake action for safe operation of the machine.

give belt releas e without excessive slack and to apply the blade brake. The blade brake is activated by the brake actuator rod linkag e to the clutch idler pulley mechanism . The brake is designed to stop the blades within five (5) seconds after disengaging the clutch.

Blade Clutch

Idler Pulley

Adjustment

Nut

2-1/8 in. (54 mm)

Spring Overall Length

Knuckle

Joint

Spring

Uncompressed

Blade Clutch

Lever Disengaged

PTO Clutch Disengaged

Maintenance Instructions ADJUSTMENTS

Use the following procedures to check and adjust clutch disengagement and brake action:

Pulley Travel

Stop Block Eccentric Adjustment - Step 1

Use the stop block attached to PTO belt tightener arm to set the bottom position of the clutch idler pulley in the disengaged position. The stop block should contact the chassis to stop the clutch idl er pulley from movi ng further down in th e disengage d position. If the stop block is not contacting the chassis in the disengaged position, it will be necessary to loosen the brake band adjustment nut. The stop block is an “eccentric” block that will allow four adjustment positions from 5/16 in. (8 mm) to 11/16 in. (17 mm).

Stop

Block

Stop Block

Contacting Frame

Clutch Idler Pulley Travel Adjustment

Engage

Disengage

1 in. to 1-1/2 in.

(25 mm to 38 mm)

11/16 in. (17 mm)

7/16 in.

(11 mm)

PTO Belt Tightener Stop Block Adjustments

Clutch Idler Pulley Travel Adjustment - Step 2

Adjust the stop bl ock to gi ve 1 in. ( 25 mm) to 1-1/2 in. (38 m m) pulley travel from “clutch engaged” to “clutch disengaged”. To check and adjust the pulley travel, first engage the clutch, then measure the distance the pulley moves down as the clutch is disengaged and the stop block contacts the frame.

9/16 in.

(14 mm)

5/16 in.

(8 mm)

Blade Brake Band Adjustment - Step 3

After the pulley travel is set, make the following adjustment as needed:

1. Adjust the blad e brake band , using th e adjustment nut until there is a gap of approximately 1/8 in. (3 mm) between the PTO belt tightener stop block and chassis. If there are not enough threads on the brake band for adjustment, lengthen the brake actuator rod.

Blade Brake Band

Adjustment Nut

Brake Actuator

Rod

NOTE: The i mportance of this adjustmen t is if the pulley travel is exces sive an d the belt d evelops to o much slack, the belt will derail when disengaged.

Blade Brake Band Adjustment

Maintenance Instructions ADJUSTMENTS

Blade Clutch

Idler Pulley

Stop Block

PTO Belt Tightener

Chassis

Blade Brake Band Adjustment

NOTE: The l ength of the actuator rod is adjusted

by disconnecti ng the bottom clevis a nd shortening or lengthening accordingly. The standard pre-set length of the actuator rod is set at the factory at 8-1/4 in. (209 mm).

1/8 in.

(3 mm)

2. After adjustments are complete, check blade brake action as described in CHECKING/SER- VICING the Blade Brake Action in this section. If blades do not stop within five (5) seconds, check the following:

a. Recheck 1/8 in. (3 mm ) gap bet ween stop

block and chassis.

b. Make sure clutch and brake linkage are

working freely (no binding). c. Check the brake band lining. d. Check the brake drum on the pulley. If

excessive w ear is present, it wi ll be ne ce s-

sary to replace worn parts.

Transmission Control IMPORTANT: The pr oper adjustment of the trans -

mission control stops is ess en tial for efficient operation and life of th e transmiss ion. These stops are properly adjusted at the fac tory and should on ly re quire readjustment if the transmission or related control linkage is removed or changed.

NOTE: It would not be unusual for a new machine, after initial 5 or 10 hours of operation, to begin to not travel straight (this is due to the break-in of the transmissions). In this case, proceed to Straight Ground Travel Adjustment - Step 4.

8-1/4 in.

(209 mm)

Brake Actuator Rod Adjustment

Locknuts

Bottom

Clevis

IMPORTANT: The following adjustment procedures are sequential. Check and adjust each functio n in the order given.

Set Forward Travel Limit (Stop) - Step 1

1. Move the Forward Speed Control (FSC) lever to the most FORWARD position.

2. Check clearance of the RH and LH steer i ng le ver actuator arms with the frame and adjust for- ward stop bolt so each lever clears the frame by at least 1/16 in. (1.6 mm). Clearance of the arm to the frame should be check ed while ap- plying pressure back on the arm to remove any slack in the linkage.

Maintenance Instructions ADJUSTMENTS

3. Tighten the jam nut on the forward travel stop adjusting bolt.

CAUTION

Steering Lever

Actuator Arms

Forward Travel

Stop Bolt

Steering

Adjustment Nut

Forward Speed Control Stop

and Steering Lever Adjustment

Steering Lever End Play Adjustment - Step 2

1. Position the FSC lever to the most FORWARD position.

2. Loosen the adjustment nut on each steering lever actuator until end play develops between the lever actuator a nd the adj us tme nt n ut (s li ding on transmission control rod).

3. Hold the actuator back as shown (against the spring pressure) and tighten the nut to the point where the end play is removed and then tight-

en two additional turns.

IMPORTANT: If the adjustment nut is too loose

(end play exists) excessive loads are placed on transmission internal control stops. If the adjust- ment nut is too tight (preferred condition), the maximum forward travel speed is reduced.

Neutral Function Adjustment - Step 3

1. Move the FSC lever to the NEUTRAL-PARK position (rear travel limit).

Push Back on Actuator

Arm and Tighten Nut

NEVER attempt to disconnect any sa fety devices or defeat the purpose of these safety devices.

FSC Actuator

Clevis

LH Hydrostatic Transmission

(For Orientation)

Neutral

Safety Switch

Neutral Function Adjustment

3. If drive wheels are moving, stop the engine and adjust the FSC neutral stop by adjusti ng the FSC actuat or clev is (see Neutral Function Ad- justment photo for clevis location). If the drive wheels are moving backward, remove the cotter pin and clevis pin and screw the clevis forward. If the drive wheels are movi ng forward, screw the clevis backward. Restart the engine and check for wheel movement (several “trial and error” adjustments may be required). At this point it may not be possible to adjust both wheels stationary since the differential adjustmen t has not been made. (This is covered by the Straight Ground Travel Adjustment - Step 4.) In this case, the neutral adjustment should be made for one wheel stationary and the other moving for- ward slightly.

2. Start the engine (operate first at idle and then normal operating speeds) and check for move-

ment of the drive wheels. NOTE: If the engine will not start, check and ad-

just the neutral safety switch (see item 4 below).

4. Check and adjust the neut ral safety switch for closure and function with the FSC in neutral (the engine will not start when the switch is open). Slight adjustments can be made by carefully bending the leaf switch up or down as needed. Refer to adjustment description for Safety Switches in this section.

Maintenance Instructions ADJUSTMENTS

Straight Ground Travel Adjustment - Step 4

1. Sit in the seat, start the engine (opera te at normal speed), and with the FSC in the NEUTRAL- PARK position check for forward movement of either drive wheel (if either wheel moves back-

ward, refer back to Neutral Function Adjust- ment - Step 3 and readjust). Tighten the

steering lever adjustment nut on the side of the mower with the wheel moving forward

until wheel movement stops.

2. Check for straight grou nd trac k on a leve l sur- face (with hands off the steering levers). Set the FSC at several different speeds and observe if the mower moves in a straight line (use cement joint or other l ine on the g ro und for r eference).

NOTE: The final tracking adjustment is made with the mower moving, since the adjustment is quite sensitive and is more easily “fine tuned” when moving.

3. If travel is not straight, tighten the adjustment

nut that is on the same side of the mower as the wheel that is moving too fast, e.g., the

mower tracks to the right, indicating the LH wheel is moving too fast, tighten the LH adjustment nut.

Forward Speed Control Friction Lock The FSC friction lock is adjusted to hold the select-

ed forward speed when the steering levers are

moved and yet the fri ct ion is not too heavy to make moving the control difficult (too much friction). The procedure for checkin g and adjusting th e FSC friction lock is as follows:

FSC Actuator

Friction Washer

Friction

Adjustment Nut

Forward Speed Control Friction Lock

1. Place the FSC in the full FORWARD position and pull both ste ering leve rs bac k; the FSC lever should not move. If the FSC leve r moves back when the steering leve rs are pu lled b ack, the friction needs to be increased.

End Wrench on

Adjustment Nut

Straight Ground Travel Adjustment

2. With the steering levers held back, move the FSC lever back from the FORWARD position. With a proper amoun t of friction adjusted, the FSC lever should move back with a slight amount of resistance (friction). If the FSC lever movement is “stiff”, the friction needs to be de-

creased.

3. The FSC friction is increased or decreased by tightening or loosening the friction adjustment nut. Loosen or tighten the nut and check

the control function until conditions of both steps 1 and 2 (above) are met.

Maintenance Instructions ADJUSTMENTS

Tilt-Up Deck Adjustable Stop

When the carrier frame hinge joint is properly adjusted, the deck lock levers should move in and out of the engaged and disenga ged positions freely. All four hitch pins used for height adjustment should sit flush on the washers above the deck pin bus hing. On a level surface, if any pin is sticking up (likely the front pins), tighten the opposite side or loosen the existing side to lower the pin. Adjustments are made by loosening the jam nut and tightening or loosening the set screws on the Deck Mount Pivot Brackets. Retighten the jam nut when the adjustment is complete.

Jam Nut

Set Screw

Tilt-Up Deck Adjustable Stop

Carburetor - MT

CAUTION

DO NOT change the engine governor settings or overspeed the engine. The governor has been factory set for ma ximum safe engine operating speed.

The fixed main jet ca rbureto r is designed to deliver the correct fuel-to-air mixture to the engine under all operating conditions. The high idle is set at the factory and cannot be adjust ed. The low idle mixture screw is also set at the fac tory and normally does not need adjustment. The only adjustment normally made to the carburetor is to set the idle speed. However, if the engine exhibits any of the follo wing symptoms, it may be necessary to adjust or service the carburetor: black, sooty exhaust smoke; lack of power; engine miss or backfir e; hard to start; roug h running; stalls at low idle speed.

NOTE: Due to the techn ical requirements of modern carburetors, re fer to th e Kohler Servic e Manu al or contact an authorized Kohler engine dealer for carburetor adjustments and service not described in this section.

CAUTION

ALWAYS use the proper engine service manual when working on the engine. Unauthorized maintenance operations or modifications to the engine MAY result in unsafe operating conditions.

Since the carburetor main jet is non -adjustable, for operation above 5000 ft (1,524 m) above s ea l eve l, it may be necessary to chan ge the ca rbur etor main jet for best fuel economy and power. Contact an authorized Kohler dealer to change the carburetor main jet.

Engine Idle Adjustment

IMPORTANT: Some emission certified engines may not have an adjustable idle mixture needle valve; it is fixed from the factor y and the ad justable screw is "capped". In this case, only the idle speed is adjustable and only Step 4 of the in str uc ti ons be low applies.

1. Gently close the i dle mixture needle valve by turning it clockwise until it bottoms lightly.

IMPORTANT: The needle valve and carburetor seat may be damaged by turning the adjustment screw too tight.

2. Preliminary Se tting : Turn the idle mixture nee dle valve out (counterclockwise) 1-1/2 turns from the closed position. This initial adjust- ment will allow the engine to be started and warmed up prior to the final adjustment.

Maintenance Instructions ADJUSTMENTS

Low Idle Mixture

Needle Valve

(May be Non-Adjustable)

Fixed Main Jet Under

Shutdown Solenoid

Idle Speed

Screw

Carburetor Adjustment

DANGER

The engine must be running to adjust the carburetor for engine idle. To guard against injury, keep hands, feet, face, and other part s of body away f rom the muffler/ exhaust pipe, other hot parts of the engine, and moving or rotat ing parts of the engine.

3. Start the engine and allow it to warm up by running at 1/2 throttle for approximately five (5) minutes. The engine must be warm before making final settings.

4. Move the throttle to the idle position. Adjust idle speed for 1200 rpm (± 75 rpm) by adjusting the idle speed screw. Check the idle speed using a tachometer.

5. With the engine idling, adjust the idle mixture by turning the idle mixture needle valve in (slowly) from the preliminary s etting until en gine speed decreases and then back out approximately 3/4 to 1 turn to obtain the best low speed performance.

The fixed main jet carbu retor is des igned to de liver the correct fuel-to-air mixture to the engine under all operating conditions. The high idle is set at the factory and cannot be adjuste d. The low idle mixture screw is also set at the facto ry and normally does not need adjustment. The only adjustment normally made to the carburetor is to set the idle speed. However, if the engine exhibits any of the foll owing symptoms, it may be necessary to adjust or service the carburetor: black, sooty exhaust smoke; lack of power; engine miss or b ackfi re; h ar d t o s tart; ro ugh running; stalls at low idle speed.

CAUTION

ALWAYS use the proper engine service manual when working on the engine. Unauthorized maintenance operations or modifications to the engine MAY result in unsafe operating conditions.

Low Idle Speed (RPM) Adjustment

1. Place the throttle control into the "idle" or "slow" position. Set the low idle speed to 1200 RPM (± 75 RPM) by turning the low idle speed adjusting screw (cable w/knob). Check the idle speed using a tachometer.

2. If proper operation is not restored a fter adjusting the low idle speed, carbureto r servicing by an authorized Kohler engine service dealer may be required.

6. Recheck idle spe ed after the final idle mixture adjustment.

Carburetor - MTL

CAUTION

DO NOT change the engine governor settings or overspeed the engine. The governor has been factory set for ma ximum safe engine operating speed.

Idle Screw

Model MTL Idle Screw

Maintenance Instructions ADJUSTMENTS

GHS “Full” Signal Horn with Grass-Pak® Switch

If the GHS “full” signal horn is not sounding when the catcher is full, the following troubleshooting and adjustment instructions apply:

1. Check the horn. a. Disconnect the two wires fr om the Grass-

switch electric connector plug and

Pak make a jumper wire connection between these wires (bypassing switch).

b. Turn the ignition switch ON and move the

blade clutch to the ENGAGED position (engine not running) to make the horn sound.

DO NOT test the Grass-Pak® switch with the engine running. Projectiles CAN be thrown out of the grass delivery spout and CAN cause serious injury to bystanders or property damage.

WARNING

c. If the horn does not sound, the horn is bad

and needs to be replaced.

d. If the horn does sound, proceed to step 2.

2. Check the Grass-Pak

switch.

a. Reconnect the wires to the Grass-Pak

switch electric connector plug.

b. Turn the ignition switch ON and move the

blade clutch to the ENGAGED position (engine not running).

c. Open the catcher back door and trigger the

Grass-Pak

vane by hand as it oscillates.

DANGER

PINCH POINT - SPRING LOADED DOOR

d. The horn should sound as the switch is

moved in both d irections . If the horn does not sound, the switch i s bad and need s to be replaced.

Grass-Pak

Vane Switch

Checking the Grass-Pak

Adjustment (When Horn Sounds at Wrong T ime)

The vertical position of the Grass-Pak

Switch

switch is critical to make sure the catche r box does not overfill causing the delivery chute to clog. The vert ical position can be adjusted by bending the mounting bracket for the Grass-Pak

switch.

1. Position the discharg e chute so that it is poin t-

ing straight back. a. Turn the ignition switch ON and move the

blade clutch to the ENGAGED position (engine not running).

b. Open the catcher back door and monitor

the spout position (as it oscillates) and move the blade clutch to the DISEN- GAGED position and turn the ignition switch to the OFF position.

WARNING

DO NOT test the Grass-Pak® switch with the engine running. Projectiles CAN be thrown out of the grass delivery spout and CAN cause serious injury to bystanders or property damage.

2. Measure from the exhaust screen (top of catch-

er) to the top of the Grass-Pak vane, as shown. The proper measurement should be between 4 and 4-1/2 inch es (10.16 and 11.43 cm).

switch actuator

Maintenance Instructions ADJUSTMENTS/ELECTRICAL SYSTEM

Exhaust

Screen

4 to 4-1/2 in.

Bend Point

Adjusting the Grass-Pak® Switch

3. If adjustment is r equired, hold the Gras s-Pak switch mount bracket firmly, grasp the switch and bracket and bend it down. Adjustments should be done in very sm all increm ents checki ng the measurement each time until the recommended measurement is achieved. This measurement is applicable to all catcher box sizes.

ELECTRICAL SYSTEM For troubleshooting, refer to Wiring Diagram. IMPORTANT: For Model MTEFI, an illuminated En-

gine Service Light on the control panel means that a fault has been detected in the electrical/fuel system. Contact an authorized Kohler Ser vice Dealer to diagnose the fault.

IMPORTANT: Disconnect both battery cables before unplugging any wiring connectors or making repairs on the electrical system.

IMPORTANT: Disconnect the battery cables before unplugging and removing the instrument panel.

Circuit Breakers

A master circuit breaker is mounted on a bracket be-

hind the battery. The circuit breaker may have either the manual or automatic reset function -- both types have been used. See Circuit Breaker Location photo.

Circuit Breaker

Mounting Bracket

NOTE: It will not be possible to adjust the switch to give a signal at the precise instant the catcher is full for a wide variety of m owin g cond iti on s. Fo r e xample, wet heavy grass will fill the catcher differently than dry fluffy grass, causing the signal to come on a little sooner or later than usual. Primarily, the switch should be adjusted to give the “full” signal with a little advance warning before overfilling and clogging of the grass delivery chute begins (regardless of mowing conditions).

Location Reset Amperage Circuits (Electrical Load)

Master Circuit Breaker Mounted on Bracket Behind Battery

Radiator Fan Circuit Breaker Mounted Adjacent to Master Circuit Breaker

Instrument Panel 7 AMP

30 AMP - Instrument Panel (MT, MTL, MTEFI)

30 AMP - Fan Control Module (MTL)

30 Amp

Circuit Breaker

Circuit Breaker Location

- Headlights (MT, MTEFI)

- Starter Solenoid (MT, MTL, MTEFI)

- ECU (MTEFI)

- Powerfil

- Safety Circuits (MT, MTL, MTEFI)

- Warning Lights/Horn (MTL)

(MT, MTL, MTEFI)

Instrument Panel 10 AMP - Headlights (MTL)

Maintenance Instructions ELECTRICAL SYSTEM

Wiring Diagram - Model MT

OPTIONAL

LIGHT

RED

BLK

BATTERY

POWERFIL

MOTOR

BLK

ORG BLK

GRA GRA

WHT

GRA

SEAT

SWITCH

87A

GRN

TIME

DELAY

MODULE

RED/YEL

WHT

8586

RED

GRA

BRN

30 AMP

CIRCUIT

BREAKER

RED

BLK

CHASSIS GROUND

RELAY - C

GRN

BLK

YEL

WHT

PUR

GRN

BLU

BLK

FSC

NEUTRAL

INTERLOCK

SWITCH

PTO

INTERLOCK

SWITCH

RED

BLK

GRA

BRN

BLK/WHT

RED

HORN

BLK

BLU

STARTER SOLENOID

WHT

PUR

GRN

BLK

PUR

ORG

PUR

GRASS PAK

OIL PRESSURE

OIL TEMP SWITCH

CYLINDER HEAD

TEMP SWITCH

SWITCH

STARTER

MAGNETO

REGULATOR

SWITCH

BRN/WHT

BRN

ENGINE

PUR

WHT

YEL

RED RED

BLK

GRA GRA

BLU BLU

GRN

RED

PUR

BRN/WHT

GRA

ORG

WALKER MODEL MT

Beginning S/N 2001- 49592

IGNITION SWITCH CIRCUITS

OFF

START

RUN

S1 = START CIRCUIT S2 = START/ACCESSORY CIRCUIT

M = MAGNETO GROUND CIRCUIT B = BATTERY CIRCUIT A = ACCESSORY CIRCUIT G = GROUND CIRCUIT

OFF

START

RUN

PUR PUR WHT

YEL

BLU

7 AMP

CIRCUIT

BREAKER

87A

PTO

BLK

GRN

RELAY - B RELAY - A

G + M

B + A / S1 + S2

B + A

RELAY - A

START RELAY

OPEN

30 + 87

OPEN

PUR

LIGHTS

PUR

BLK

GRN

RED

BLU

PUR

BLU

PUR

HORN

PUR

BLK

RED YEL

BLK

BLU

PUR

YEL

8730

RED

HOUR

METER

VOLTAGE

METER

PUR

OIL

PRESSURE

LIGHT

OVER TEMP LIGHT

BAS1

PUR

RELAY - B

IGNITION RELAY

RELAY - C

DELAY RELAY

OPTIONAL

LIGHT

PUR

RED

30 + 87A

OPEN

30 + 87A

OPEN

OFF

START

PTO ON

OFF

START

RUN

RED

PUR

WHT

Maintenance Instructions ELECTRICAL SYSTEM

Wiring Diagram - Model MTEFI

RED/WHT

WALKER MODEL MT-EFI Beginning S/N 2001-49448

IGNITION SWITCH CIRCUITS

OFF

START

RUN

S1 = START CIRCUIT S2 = START / ACCESSORY CIRCUIT M = MAGNETO GROUND CIRCUIT B = BATTERY CIRCUIT A = ACCESSORY CIRCUIT G = GROUND CIRCUIT J1 = #1 FUEL INJECTOR J2 = #2 FUEL INJECTOR J3 = THROTTLE POSITION SENSOR J4 = OIL TEMP SENSOR J5 = OXYGEN SENSOR J6 = REGULATOR / RECTIFIER J8 = ENGINE GROUND J10 = #1 IGNITION COIL J11 = #2 IGNITION COIL J12 = #1 IGNITION COIL J13 = #2 IGNITION COIL J14 = IGNITION COIL GROUND J20 = SPEED PICK-UP SENSOR

OFF

START

PTO ON

OFF

START

RUN

START / TIME DELAY RELAY

OFF

START

RUN

START / SOLENOID RELAY

OFF

RUN (LOW)

RUN (HIGH)

G + M

B + A / S1 + S2 B + A

RELAY - A

IGNITION / FUEL RELAY

OPEN OPEN

30 + 87

RELAY - B

DELAY RELAY

30 + 87A

OPEN OPEN

RELAY - C

30 + 87A 30 + 87A

OPEN

RELAY - D

OPEN OPEN

30 + 87

TAN

BLU

BLK

PNK

BRN

ORG

WHT

GRN

BLK/WHT

BLK

RED

GRN

BLK

YEL

PUR

GRA

RED

RED/YEL

BLU

BLK

RELAY - A

GRA

RED

GRN

BLK/WHT

RED/WHT

J21

BRN

ORG

BLK

WHT

RED/WHT

GRN

BLK

YEL

RED

DIAGNOSTIC

TEST PLUG

RED/YEL

WHT

TO J5

TO J4

TO J8

TO J2

TO J3

TO J3/J4

GRA

BLK

RED

SERVICE

DEPT. ONLY

RED/WHT

TO J10

TO J11

TO J1

TO J1/J2

TO J12/J13

TO J20

BLK

RED

BLU

PUR

RELAY - B

GRN

BLK

RED/YEL

87A

TIME

DELAY

MODULE

RED

WHT

FOR TAIL

WHEEL LOCK

WHT

PUR

BLK

GRA

BRN

RED

GRN

GRA

BRN

PUR

J17

WHT

RED

BLK/WHT

RED/YEL

BLU

RED

J17

RED/YEL

BLU

BLK/WHT

Maintenance Instructions ELECTRICAL SYSTEM

Wiring Diagram - Model MTEFI

RED/

RED/WHT

RED

WHT

PUR

BLK

BRN

GRA

SEAT

SWITCH

RED/YEL

BLU

BLK/WHT

10 AMP FUSE

20 AMP FUSE

BRN

ORG

PTO

RED

BLK

WHT

J17

BRN/WHT

FSC

NEUTRAL

INTERLOCK

SWITCH

PTO

INTERLOCK

SWITCH

GRA

RED/ WHT

OPTIONAL

87A

LIGHT

FUEL PUMP

ORG

BLK

RED

BLK

ORG

BREAKER

BATTERY

RED

30 AMP

CIRCUIT

POWERFIL

MOTOR

BLK

ORG

BLK

REDRED

YEL

BLU

J17

GRN

BLK

RED

BLK

RELAY - DRELAY - C

RED/YEL

GRASS PAK

SWITCH

BLK

PUR PUR

30 AMP FUSE

STARTER

STARTER SOLENOID

PUR

REGULATOR

GRN

OIL PRESSURE SWITCH

BLK

OIL TEMP SWITCH

CYLINDER HEAD

BLK

TEMP SWITCH

PUR

WHT

YEL

RED

BLK

GRA

GRN

BLU

RED

7 AMP

CIRCUIT

BREAKER

RED/YEL

BLU

PUR

PUR WHT

YEL

BLK

GRA

GRN GRN BLU BLU

PUR

CHECK

ENGINE

LIGHT

RED

PUR

BLK

HORN

BLU

RED

GRN

BLU

WARNING

HORN

BLK

LIGHTS

PUR

YEL

PUR

YEL

BLK

PUR

GRN

BLK

PUR

HOUR

METER

VOLTAGE

METER

OIL

PRESSURE

LIGHT

BLK

OIL / CYL

HEAD

TEMP LIGHT

PUR

OPTIONAL

GRAGRA

LIGHT

RED

PUR

WHT

RED

PUR

YEL

Maintenance Instructions ELECTRICAL SYSTEM

Wiring Diagram - Model MTL

POWERFIL

MOTOR

ORG

BLK

OPTIONAL

LIGHT

RED

PTO

INTERLOCK

SWITCH

TIME

DELAY

87A

BRN

GRN

ORG

RED

WHT

30 AMP

CIRCUIT

RED

BREAKER

RED

BREAKER

BLK

CHASSIS GROUND

GRA

RED

WHT

BRN

GRN

30 AMP

CIRCUIT

SWITCH

GRA

WHT

RED

BLK

GRN

BLK

MODULE

RELAY - E

BATTERY

BLK

BLK/WHT

BLK

RED/YEL

SEAT

RED PUR

BLK/WHT

BRN

BLK

REVERSING

MODULE

YEL BLU

WHT WHT

PUR PUR

GRN GRN

BLU BLU

ORG/BLU

WHT WHT

GRA

ORG/WHT

BRN

NEUTRAL

INTERLOCK

SWITCH

HORN

BLK

GRN

GRA

YEL

PUR PUR

RED

FSC

BLK/WHT BLK/WHT

RED

BLK

BRN

BLK BLK GRN BLU/ORG GRA

YEL PUR PUR

BLU BLU/ORG

WHT RED RED

BLK/WHT

BRN/WHT

GRASS PAK

SWITCH

BLK

BLKRED

ORG/BLU

STARTER

STARTER SOLENOID

MAGNETO

REGULATOR

OIL PRESSURE

SWITCH

WATER TEMP

GAUGE SENDER

WATER

TEMP

SWITCH 1/4"

ENGINE

BLU

HOUR

METER

10 AMP

PUR

CIRCUIT

BREAKER

PUR

CIRCUIT

BREAKER

PUR

ORG

RED

IGNITION SWITCH CIRCUITS

OFF

START

RUN

S1 = START CIRCUIT S2 = START / ACCESSORY CIIRCUIT

M = MAGNETO GROUND CIRCUIT B = BATTERY CIRCUIT A = ACCESSORY CIRCUIT G = GROUND CIRCUIT

BLK

ORG/WHT

BLU

FAN

GRAGRA

BLK

PUR

GRA

RED

PUR

SWITCH 3/8"

GRA

WATER

TEMP

WHT/ORG

86 85

BLU

RESISTOR

BLK/WHT

ORG

BLU BLK

BRN

LIGHTS

7 AMP

ORG

RED

G + M

B + A / S1 + S2 B + A

RELAY - D

GRN

87A

BLU

WHT/ORG

YEL

BRN/WHT

GRN

YEL

BLK

87A

WALKER MODEL MTL

Beginning S/N 2001-54652

PTO RELAY

OFF

START

PTO ON

START RELAY

OFF

START

RUN

FAN INTERRUPT RELAY

OFF

START

RUN

FAN SPEED CONTROL

OFF

RUN (LOW)

RUN (HIGH)

DELAY RELAY

OFF

START

RUN

GRA

BLU

WARNING

HORN

BLK

VOLTAGE

BLK

METER

WATER

TEMP

BLK

BLU

PUR

RELAY C

RED

RELAY B

RED

RELAY A

GRA

BLK

YEL

BLK

PRESSURE

LIGHT

RED

WATER

TEMP

LIGHT

BLK

RED

OIL

GRN

BLU

BLK

BAS1

PUR

RELAY - A

30 + 87A

OPEN

RELAY - B

OPEN

30 + 87

OPEN

RELAY - C

30 + 87A

OPEN

30 + 87A

RELAY - D

30 + 87A

30 + 87

RELAY - E

30 + 87A

OPEN

OPTIONAL

LIGHTS

PUR

WHT

YEL

LIMITED W ARRANTY

FOR

WALKER

COMMERCIAL RIDER MOWER

1. WHAT THIS WARRANTY COVERS, AND FOR HOW LONG:

Walker Manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which is found to be defective in material and/or workmans hip within one (1) year* after date of s ale to the original retail purchaser unless the product is used for rental purposes, in which case this warranty is limited to ninety (90) days. At Walker’s request, customer will make the defective part available for inspection by Walker and/or return the defective part to Walker, transportation charges prepaid. All parts and components of the Walker Mower are covered by this warranty except the following components which are warranted separately by their respective manufacturers:

Kohler Engine Kubota Engine Kawasaki Engine Eaton Hydraulic Transmission Peerless Gearboxes Battery Tires

The available warranties covering these items are furnished with each mower. Walker does not assume any warranty obligation, liability or modification for these items, which are covered exclusively by the stated warranty of the respective manufacturers noted above.

* An extended three (3) year warranty is offered on the Walker P/N 6200-9 Gear Axle Assembly.

2. WHAT THIS WARRANTY DOES NOT COVER:

A. This warranty does not cover defects caused by depreciation or damage caused by normal wear, accidents, improper

maintenance, improper use or abuse of the product, alterations, or failure to follow the instructions contained in the Owner’s Manual for operation and maintenance.

B. The customer shall pay any charges for making service calls and/or for transporting the mower to and from the place

where the inspection and/or warranty work is performed.

3. HOW TO OBTAIN SERVICE UNDER THIS WARRANTY:

Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Manufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to verify warranty coverage.

4. WARRANTY LIMITATION:

A. THERE IS NO OTHER EXPRESS WARRANTY. ANY WARRANTY THAT MAY BE IMPLIED FROM THIS

PURCHASE INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY LIMITED TO THE DURATION OF THIS WARRANTY AND TO THE EXTENT PERMITTED BY LAW ANY AND ALL IMPLIED WARRANTIES ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty

lasts, so the above limitations may not apply to you.

B. WALKER WILL NOT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES AND/OR

EXPENSES IN CONNECTION WITH THE PURCHASE OR USE OF THE MOWER. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not apply to you.

C. Only the warranty expressed in this limited wa rranty sh all apply and no dealer, distributor, or individual is authorized

to amend, modify, or extend this warranty in any way. Accordingly, additional statements such as dea ler advertising or presentations, whether oral or written, do not constitute warranties by Walker, and should not be relied upon.

D. This warranty gives you specific legal rights, and you may also have other rights which vary from state to state.

Sound - Model MT

Vibration - Model MT

Lwa

104

LpA

OPERATOR

Lwa

101

LpA

OPERATOR

Sound Test

Sound test conducted was in accordance with 79/113/EEC and was performed on 22 March 96 under the conditions listed:

General Condition: Clear

Temperature: 50 (F) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% Ba r o met r i c P r e ssu r e: 2 4 . 9" H G (75 9 m m Hg )

10 (C)o

Sound - Model MTL

Sound Test

Sound test conducted was in accordance with 79/113/EEC and was performed on 26 June 02 under the conditions listed:

General Condition: Clear

Temperature: 50 (F) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% Ba r o met r i c P r e ssu r e: 2 4 . 9" H G (75 9 m m Hg )

10 (C)o

Vibration Level

Vibration levels at the operators handles were measured in the vertical, lateral, and

0.8g

longitudinal directions using calibrated vibration test equipment.

T ests were performed on 22 March 96 under the conditions listed:

General Condition: Clear

Temperature: 50 (F) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% Barometric Pressure : 24.9" HG (7 59 mm Hg)

10 (C)o

Vibration - Model MTL

Vibration Level

Vibration levels at the operators handles were measured in the vertical, lateral, and

0.8g

longitudinal directions using calibrated vibration test equipment.

Tests were performed on 26 June 02 under the conditions listed:

General Condition: Clear

Temperature: 50 (F) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% Barometric Pressure : 24.9" HG (759 mm Hg)

10 (C)o

Vibration - Model MTE F I

Vibration Level

Vibration levels at the operators handles were measured in the vertical, lateral, and

0.8g

longitudinal directions using calibrated vibration test equipment.

Tests were performed on 26 June 02 under the conditions listed:

General Condition: Clear

Temperature: 50 (F) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% Barometric Pressure : 24.9" HG (759 mm Hg)

10 (C)o

Lwa

100

LpA

OPERATOR

Sound - Model MTEFI

Sound Test

Sound test conducted was in accordance with 79/113/EEC and was performed on 26 June 02 under the conditions listed:

General Condition: Clear

Temperature: 50 (F) Wind Speed: < 5 mph (< 8 kmh) Humidity: 52% Ba r o met r i c P r e ssu r e: 2 4 . 9" H G (75 9 m m Hg )

10 (C)o

WA LKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-56 14

Walker MT User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Foreword

Table of Contents

General Information________________ 4

Specifications________________________ 6

Component Identification__________ 11 Safety Instructions _________________ 16

Assembly Instructions _____________ 22

Operating Instructions_____________ 31

Maintenance Instructions__________ 52

Warranty ___________________________ 97

General Information

HIGHLIGHTED INFORMATION

GLOSSARY

IDENTIFYING NUMBER LOCATIONS

Fill In By Purchaser

Tractor Serial Number Location

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCATION

Engine Serial Number Location (MTL)

SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS

Engine Serial Number Location

Specifications

ENGINE

ELECTRICAL SYSTEM

TRANSMISSION

BLADE DRIVE

TIRE SIZE

TIRE PRESSURE

DIMENSIONS (Tractor and Mower)*

MOWER DECK

CURB WEIGHT (Approximate)

DRIVE BELTS

GHS SYSTEM (Optional)

SEAT

FRAME/BODY CONSTRUCTION

Component Identification

Front View and Right Side View

Rear View and Left Side View

Top View (Engine Compartment) Model MT

Top View (Engine Compartment) Model MTL

Top View (Engine Compartment) Model MTEFI

Safety Instructions

BEFORE OPERATING

OPERATING

MAINTENANCE

SAFETY, CONTROL, AND INSTRUCTION DECALS

SAFETY, CONTROL, AND INSTRUCTION DECALS

Assembly Instructions

SETUP INSTRUCTIONS

Tire Installation (Tractor)

Battery Service

Wet Battery Service

Dry Battery Servic e

Battery Charging

Battery Installation

Battery Installation

Mower Deck Assembly

Deck Caster Wheels Installation

Deck Discharge Chute Installation (GHS Rear Discharge Models Only)

Deck Discharge Shield Installation (Side Discharge Models Only)

PTO Shaft Guard Installation

Tilt-Up Roller Wheel Installation

Deck Installation

Mower Deck Installation (PTO Shaft Connec t io n )

Installing PTO Quick Coupler

Deck Counterweight Spring Installation

Deck Leveling

Deck Leveling

PREOPERATING CHECKLIST

Deck Secured in TILT-UP Position

Operating Instructions

CONTROL IDENTIFICATION, LOCATION, AND FUNCTION

Operating Controls

Engine Choke - (Model MT and MTL only)

Operating Controls

Steering Levers

Choke and Throttle Location (MT and MTL)

Component Identification 11 Safety Instructions _______ 16