Walker MT User Manual
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
Table of Contents
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
1
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
2
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
3
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.
4
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________
Fill In By Purchaser
General Information
Serial Number
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
5
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)
TM
LH685, 2 Cyl.,
6
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
7
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
8
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
9
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.
10
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
11
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
12
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
13
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
Muffler
Shield
Tailpipe
Radiator
Hose
Throttle and Choke
Linkage
Radiator Cap
Oil Dipstick/
Oil Fill
14
Precleaner
Tube
Water
Pump
Top View (Engine Compartment) Model MTL
Air Intake
Plenum
Radiator
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
Muffler Grass
Shield
Shield
Throttle Linkage
Oil Dipstick/Oil Fill
Muffler
Rubber Bumper
(Catcher Support)
Ignition
Coil
Top View (Engine Compartment) Model MTEFI
Air Intake
Plenum
15
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.
16
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.
17
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).
18
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.
19
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)
20
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)
21
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.
22
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.
23
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
24
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.
25
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
26
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
27
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].
28
• 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.
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