Walker Mowers, MBS29 Operator's Manual

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OPERATOR’S MANUAL

Safety , Assembly , Operating, and Maintenance Instructions

Model MBS29

Please Read and Save These Instructions Beginning S/N: 125598

For Safety , Read All Safety and Operation Effective Date: 01-09-12 Instructions Prior to Operating Machine P/N 2000-7

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 satised custom ers.

If for any reason this product does not perform to your expectations, please contact your local dealer. Every customer is important to us. Y our satisfaction is our goal.

Please. . .read this manual thoroughly! This manual is to be used in conjunction with the engine

manufacturer’s manual for the specic 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 contact your local authorized dealer or call our

service department, at (970) 221-5614, for clarication before operating or servicing this mower.

This manual covers Model MBS29 with the Kohler ECH749 (29 HP) Electronic Fuel Injection (EFI) gasoline engine.

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.

Specications given are based on the latest information available at the time this manual was produced for a tractor with standard equipment. Optional equipment is available and may affect the

standard specications listed.

Walker Mfg. Co. is continually striving to improve the design and performance of its products. We

reserve the right to make changes in specications and design without thereby incurring any obli-

gation relative to previously manufactured products.

Sincerely, WALKER MANUF ACTURING COMP ANY

Bob Walker , President

General Information ________________ 1

HIGHLIGHTED INFORMA TION _____________ 1 GLOSSARY ____________________________ 1 IDENTIFYING NUMBER LOCA TIONS ________ 1 ENGINE SERIAL NUMBER LOCA TION _______ 2

SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS ______________ 2

Specications ________________________ 3

ENGINE ________________________________ 3 ELECTRICAL SYSTEM ___________________ 3 TRANSMISSION _________________________ 3 BLADE DRIVE __________________________ 4 TIRE SIZE ______________________________ 4 TIRE PRESSURE ________________________ 4 DIMENSIONS ___________________________ 4 CURB WEIGHT __________________________ 5 DRIVE BEL TS ___________________________ 5 SEAT __________________________________ 5 FRAME/BODY CONSTRUCTION ____________ 5 DECK CHART ___________________________ 5

Component Identication ___________ 6

Safety Instructions __________________ 9

BEFORE OPERA TING ____________________ 9 OPERATING ___________________________ 11 MAINTENANCE ________________________ 13 SAFETY , CONTROL, AND INSTRUCTION DECALS _________________ 14

Assembly Instructions ______________ 18

SETUP INSTRUCTIONS __________________ 18

Battery Service _______________________ 18

Wet Battery Service __________________ 18 Dry Battery Service ___________________ 18 Battery Charging _____________________ 19

Mower Deck Assembly _________________ 19

Deck Caster Wheels Installation _________ 19 Deck Discharge Deector Shield Installation ____________________ 20 PTO Shaft Guard Installation ___________ 20 Tilt-Up Roller Wheel Installation _________ 20

Mower Deck Installation on Tractor _______ 21

Deck Installation _____________________ 21 Deck Leveling _______________________ 23

PREOPERA TING CHECKLIST _____________ 24

Operating Instructions _____________ 26

CONTROL IDENTIFICA TION, LOCA TION, AND FUNCTION _____________ 26

Ignition Switch _______________________ 26 Engine Throttle _______________________ 27 Body Latch __________________________ 27 Forward Speed Control (FSC) ___________ 27 Steering Levers_______________________ 28 Blade Clutch (PTO) ____________________ 28 Parking Brake ________________________ 28 Oil Pressure Warning Light _____________ 29 Engine Service Light __________________ 29 Over T emperature Warning Light ________ 29 Transaxle Lockout Rods _______________ 30 Hourmeter ___________________________ 30

ST ARTING THE ENGINE _________________ 32 ADJUSTING GROUND SPEED AND STEERING __________________ 32 ENGAGING THE BLADE DRIVE ___________ 34 STOPPING THE MACHINE _______________ 35 FUEL SELECTOR V ALVE _________________ 36 ADJUSTING CUTTING HEIGHT ____________ 36

Transport Position ____________________ 36 TRANSAXLE LOCKOUTS ________________ 37 RECOMMENDA TIONS FOR MOWING ______ 37 RECOMMENDA TIONS FOR TIL T -UP DECK OPERATION/TRANSPORT _______________ 39

Maintenance Instructions __________ 40

MAINTENANCE SCHEDULE CHART _______ 40 IMPORT ANT TIPS FOR CARE OF THE KOHLER ENGINE _______________________ 41

Fuel System _________________________ 41

Starting/Stopping _____________________ 41

Cooling System ______________________ 41

Air Cleaner System ____________________ 41

Oil__________________________________ 41 LUBRICATION _________________________ 42

Engine Oil ___________________________ 42

Engine Break-In Oil ___________________ 42 Checking Engine Crankcase Oil Level ____ 42 Changing Engine Crankcase Oil/Oil Filter __ 42

Mower Deck Spindle Lubrication ________ 44

DRD52 or DSD60 Mower Deck Lubrication _ 44

Transaxle Lubrication _________________ 44

Transaxle Oil and Filter Change _________ 44

Grease Fitting and Oil Point Lubrication __ 45

Table of Contents

CLEANING ____________________________ 48

Engine Air Cleaner System _____________ 48

T urbine Precleaner ___________________ 48 Cummins/Fleetguard OptiAir™ Air Cleaner 48

Engine Cooling System ________________ 50

Cooling Air Intake System ______________ 50 Cylinder Head Cooling Fins ____________ 50

Grass Buildup in Mower Deck Housing ___ 51 Transaxle Housing ____________________ 53

CHECKING/SERVICING __________________ 54

Security of Air Filtration Components ____ 54 Battery ______________________________ 54

Electrolyte Level _____________________ 54 Cleaning the T erminals ________________ 55 Charging the Battery __________________ 55

Tire Pressure _________________________ 55 Wheel Nut T orque _____________________ 55 Sharpen Mower Blades ________________ 55 Drive Belts ___________________________ 56 Spark Plugs __________________________ 56 Ignition Wires ________________________ 56 Fuel Lines and Clamps _________________ 57 PTO U-Joints _________________________ 57 Blade Brake Action ____________________ 57 Safety Switch System__________________ 57 Forward Speed Control Friction Lock _____ 57

REPLACING/REPAIRING _________________ 58

Drive Belts ___________________________ 58

Engine/PTO Belt _____________________ 59 Ground Drive Belt ____________________ 60

Fuel Filter ___________________________ 61 Mower Blades ________________________ 61 Replacing Deck Drive Belt ______________ 63

ADJUSTMENTS ________________________ 64

Transmission Control__________________ 64

Steering Lever Position Adjustment ______ 64 Steering Handles Adjustment ___________ 64 Neutral Position Adjustment ____________ 65 Full Forward Speed Adjustment _________ 66 Straight Tracking Adjustment ___________ 66 FSC Neutral Switch Adjustment _________ 67 Forward Speed Control Friction Adjustment ___________________ 67

Blade Clutch (PTO) ____________________ 68

Clutch Engagement/Belt T ension ________ 68 Clutch Disengagement/Brake Action _____ 69 Idler Pulley Maximum T ravel Adjustment __ 69 Blade Brake Band Adjustment __________ 70

Warranty ___________________________ 71

General Information

HIGHLIGHTED INFORMA TION

Walker Manufacturing recommends that any ser vice 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 oper ation or maintenance of a Walker Mower are caused by

disregarding basic safety precautions or specic

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 manual. Refer to Safety

Instructions for the meanings of DANGER, WARN- ING, CAUTION, IMPORTANT, and NOTE.

GLOSSARY

There are many terms that are either unique to this equipment or that are used as acronyms. The fol-

lowing terms and their denitions 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 spindles, and cutter blades.

• ELECTRONIC CONTROL UNIT (ECU) controls

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

• FORW ARD SPEED CONTROL (FSC) controls

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

• STEERING LEVERS steer the tractor by con-

trolling the two transaxles.

• TRACTOR is the prime mover, including the

engine, drive train, operator seat, and controls to operate the mower.

• TRANSAXLE transmits and controls power

from the ground drive belt to the main drive wheel.

• TRANSAXLE LOCKOUT RODS release the

transaxles to permit freewheeling the tractor.

IDENTIFYING NUMBER LOCA TIONS

The tractor serial number plate is afxed to the tractor

body just below the left rear corner of the seat. The

mower deck serial number plate is afxed alongside

the angle iron framing on the LH side of the LH mower blade drive. Model and serial numbers are helpful when obtaining replacement parts and maintenance assistance. For ready reference, please record these numbers in the space provided.

Tractor Model No. ______________________ Tractor Serial No. ______________________ Deck Serial No. ______________________ Engine Model No. ______________________ Engine Serial No. ______________________

• GROUND DRIVE refers to the dual transaxles

which drive the main wheels.

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

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

• POWER TAKE-OFF (PTO) transmits engine

power to run the cutter blades.

• REAR DISCHARGE (RD) discharges mowed

material from the back of the mower deck.

• 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) discharges mowed

material from the right side of the mower deck.

Date of Purchase ______________________

Fill In By Purchaser

General Information

Serial Number

Tractor Serial Number Location

Serial Number

SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS

The detailed servicing and repair of the engine and transaxle are not covered in this manual. Only routine maintenance and general service instructions are provided. For the service of these components during the limited warranty period, it is important to

nd a local, authorized servicing agent of the com-

ponent manufacturer. Any unauthorized work done on these components during the warranty period may void the warranty. If you have any dif-

culty nding 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

www.walkermowers.com

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCA TION

Refer to the engine manual that accompanies this manual or the photo below for the location of the engine serial number.

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

Kohler Engines Kohler Company Kohler, WI 53044 800-544-2444 www.kohlerengines.com

Transaxles Hydro-Gear 141 1 South Hamilton St. Sullivan, IL 61951 877-728-7410 http://www.hydro-gear.com

Serial Number

Engine Serial Number Location

Specications

MODEL MBS29

ENGINE

Manufacturer/Model Kohler Command Pro

Displacement cu. in. (cc) 45.6 (747) Max Power HP (kW) 29.0 (21.6) @ 3600 RPM Governed RPM 3600 Max. Torque lb·ft (N·m) 44 (60) Idle RPM 1200 Spark Plug Type Champion Spark Plug Gap in. (mm) .030 (0.76)

Crankcase Capacity qt (L) 1.9 (1.8) Crankcase Lubricant SG/SH/SJ or Higher Grade Oil Only with 10W-30 Viscosity

Oil Filter Kohler P/N 12 050 01-S Fuel Tank Capacity gal (L) 9.4 (35.6)

Fuel Automotive Grade Unleaded Gasoline (87 Octane) or

Cooling System Air Cooled Air Cleaner Remote mounted Cummins/Fleetguard OptiAir

ECH749, 2 Cyl., OHV, Gasoline

(Air-Cooled), Electronic Fuel Injection (EFI)

RC12YC

Above 0° F (-18° C) or 5W-20 or 5W-30 below 32° F (0° C)

Two Independent 4.7 Gallon Tanks with Selector Valve

Gasohol (Up to 10% Ethyl Alcohol, 90% Unleaded Gasoline by Volume)

(Walker P/N 2090-1 Primary/2090-3 Safety Filter)

ELECTRICAL SYSTEM

Battery 12 Volt (340 CCA) Charging System Flywheel Alternator Charging Output 25 Amp DC (Regulated) System Polarity Negative Ground Ignition Electronic Capacitive Discharge Starter 12 Volt Electric Ring-Gear Type, Solenoid Operated Interlock Switches Ignition Lockout by Seat Switch, Transmission Neutral and Blade

Clutch

Circuit Breaker Manual Reset (30A)

TRANSMISSION

Manufacturer/Model Dual, Independent Hydro-Gear

ZT3400 Integrated Transaxles Steering Hand Lever Control / Individual Wheel Forward Speed Control Precision Friction Lock Lever, Cruise Control, with Neutral-Park

Position Service Brake Dynamic Braking through Transaxles Parking Brake Internal Mechanical Cog Lock for each Transaxle

(Single Lever Control) Neutral Transmission Release by Manual Dump Valve Final Drive Direct Drive Axle from Transaxle

Specications

MODEL MBS29

TRANSMISSION (continued) Transmission Fluid

Factory Service 20W-50 Multi-Viscosity Motor Oil (Minimum SL Grade Oil) Transmission Oil Capacity qt (L) 2.4 (2.3) Transmission Cooling Cooling Fan Mounted on Drive Pulley Oil Filter Hydro-Gear

Ground Travel Speed

Forward MPH (km/h) Reverse MPH (km/h)

BLADE DRIVE

PTO Shaft Sliding Spline Shaft with Two (2) High-Speed U-Joints Blade Spindle Each Blade (3) Mounts Directly on Belt Driven Spindles Blade Drive Clutch and Brake Manual Belt Tightener Clutch and Band Brake

TIRE SIZE

Deck Caster Wheel 13 x 5.00-6 Pneumatic (4-Ply) Drive 22 x 10.50-12 (4-Ply Low-Prole) Rear 13 x 5.00-6 (4-Ply)

P/N 52114 (Walker P/N 2026-6)

0-10 (0-16) Innitely Variable

0-5 (0-8) Innitely Variable

[Stops Blades within Five (5) Seconds of Disengagement]

TIRE PRESSURE PSI (KPA)

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

DIMENSIONS (Tractor and Mower) Length in. (cm) 100-1/4 (255)

Tractor Only 68-1/2 (174) Wheel Base (Tractor) 42-5/8 (109) With DRD52 105-1/2 (267) With DSD60 107 (272) Tractor w/Tilted Deck 83-1/2 (212)

Width in. (cm)

With DRD52 54-1/4 (138) With DSD60 (Deector Up) 62 (158) Tread Width 36-1/2 (93) Height in. (cm) 47-1/2 (121) Standard Tractor 46-3/4 (119)

Specications

MODEL MBS29

CURB WEIGHT lb (kg)

Tractor Only 745 (338) Tractor with DRD52 Deck 1188 (539) Tractor with DSD60 Deck 1280 (581)

DRIVE BELTS

Engine PTO Walker P/N 2230 Ground Drive Walker P/N 2248

SEAT Contour-Molded, with Nylon Backed Vinyl Cover and

FRAME/BODY CONSTRUCTION

Frame/Body 3/16 Plate Steel/14 Gauge Sheet Steel Deck 11 Gauge Steel

Integral Foam Cushion (Suspension)

DECK DRD52 DSD60

Type Belt Driven, Rear Discharge Belt Driven, Side Discharge Cutting Width in. (cm) 52 (132) 60 (152) Cutting Height in. (cm) 1 to 5 (3 to 13) Height Adjustment in. (cm) 1/4 (1) Increments, 17 Positions Blade Length in. (cm) 18.4 (47) 20.5 (52) Number of Blades 3 Direction of Rotation

(Viewed from top of deck) Deck Suspension Torsion-Flex Frame with Caster Wheels and Counterweight Springs Maximum Blade RPM 3840 3330 Maximum Blade Tip Speed

ft/min (m/min)

18500 (5640) 17870 (5460)

Clockwise

NOTE: The manufacturer reserves the right to make changes in specications shown herein at any time

without notice or obligation. The specications listed are for a standard conguration tractor, and may

change with the addition of optional equipment.

Component Identication

NOTE: Control Identication

shown in Operating Instructions section.

Body Lift

Handle

Forward Speed

Control (FSC)

Friction

Adjustment

Deck Support Arm

(Not Visible)

Deck

Discharge Shield

Height Adjustment Arm

(Cutting Height Adjustment)

Body Tilt-Up

Latch

Deck Height

Adjustment Trigger

Tilt-Up Latch

Deck Height

Lift Chain

Counterweight Springs and

Protective Covers

Deck Support Arm

(Not Visible)

Footrests

Tilt-Up Hook (Not Visible)

Tilt Bar

Deck Handle

Deck

Caster Wheels

Front View and Right Side View

Component Identication

Footrest Catch

Assembly

Footrests

Left Hand

Drive Wheel

Fuel T ank

and Cap

Fuel Pickup

Line

Mufer

Oil Fill

Dipstick

Tailpipe

Spread Axle

T ail Wheel

Battery

(Not Visible)

Rear View and Left Side View

Component Identication

LH Transaxle LH Transaxle

Lockout Rod

Parking Brake

Turbine Precleaner

Cummins/Fleetguard OptiAir™ Air Cleaner

Air Filter

Cover

Fuel T ank Cap

LH Transmission

Control Arm

Steering Levers

Dampeners

RH Transmission

Control Arm

RH Transaxle

Lockout Rod

PTO Clutch

Lever

Clutch

Linkage

Transaxle Oil

Expansion Reservoirs

Fuel Selector

Valve

Fuel Pickup Line

Fuel T ank

Oil Fill

Dipstick

Rubber Bumpers

(Body Support)

T op View (Body Raised)

Air Filter

Restriction Gauge

Fuel Filter

Fuel Pump

Air Intake Hose

Oil

Cooler

Oxygen

Sensor

Mufer Heat

Shield

Safety Instructions - Before Operating

Pay particular attention 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 instructions. Fail ure to comply with safety instructions may result in personal injury .

The seriousness or degree of importance of each type of information is dened as follows:

DANGER

An IMMEDIATE hazard that WILL result in severe personal injury or DEA TH, if warn ing is ignored and proper safety precau tions are not taken.

WARNING

A POTENTIAL hazard that COULD result in severe personal injury or DEA TH, if warn ing is ignored and proper safety precau tions 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 procedures, 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 personal 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 OPERA TING

1. Read and understand the contents of this Op-

erator’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 Operator’s Manuals are available by sending the Model and Serial Number to:

Walker Manufacturing Company

5925 East Harmony Road

Fort Collins, CO 80528

CAUTION

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

IMPORTANT: Identifies mechanical information

demanding special attention, since it deals with the possibility of damaging a part or parts of the machine.

NOTE: Identies information worthy of special at- tention.

2. Never allow children to operate rider mower. Do not allow adults to operate without proper instruction.

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

4. Keep everyone, especially children and 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. W ear substantial protective

footwear.

Safety Instructions - Before Operating

6. Do not wear loose tting clothing that could get

caught in moving parts. Do not operate this machine while wearing shorts; always wear ade- quate 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 hear ing protection is recommended. Wear a suitable hearing protective device, such as ear muffs 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 miss ing, repair or replace it before operating the machine.

9. Be sure interlock switches are functioning correctly, so the engine cannot be started 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 lifts off the seat with either the Forward Speed Control (FSC) out of the NEUTRAL-PARK position or the PTO clutch in the ENGAGED position.

1 1. Never attempt to make any adjustments

while the engine is running, except where

spe cically instructed to do so.

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

WARNING

The engine exhaust from this product contains chemicals known to the State of California to cause cancer, birth defects or other reproductive harm.

NOTE: There is a 1/2 second time delay func-

tion on the seat switch to avoid engine power interruption when driving over bumps.

10. Handle gasoline with care. Gasoline is highly

ammable 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 ames, or sparks away from the fuel

tanks and fuel container.

d. Always ll the fuel tank(s) 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(s) and con-

tainer cap securely and clean up any spilled fuel before starting the engine.

Safety Instructions - Operating

1. Operate the mower only in daylight or in good

articial 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 operate

the tractor without a deck or imple ment installed.

3. For a beginning operator, learn to steer (maneuver) the tractor with a slow engine speed before attempting any mowing oper ation. Be

aware that, with the front mounted mower con-

guration, the back of the tractor swings to the

outside during turns.

DANGER

Do not mow around overhanging tree branches or bushes at the same height as the operator’s torso and head where inadvertent contact may cause injury .

7. Do not operate machine if the operator presence safety switch system is not working.

Verify proper operation by having the operator lift off the seat with the engine running and moving two controls, one at a time; (1) Move the FSC lever out of the NEUTRAL-PARK position, and (2) Engage the PTO Clutch. Moving either control should stop the engine after a 1/2 second delay.

8. Do not run the engine in a conned area with- out adequate ventilation. Exhaust fumes are hazardous and can be deadly .

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

10. Watch for holes, rocks, and roots in the terrain and for other hidden hazards. When mowing tall grass, mow higher than desired to expose any hidden obstacles. Then, clean the area and mow to the desired height.

1 1. A void sudden starts or stops. Before backing

the machine up, look to the rear to be sure no one

is behind the machine. Watch carefully for trafc

when crossing or working near roadways.

4. Remember, for an emergency stop, the forward motion of the tractor can always be stopped by pulling the Forward Speed Control (FSC) into the NEUTRAL-PARK position.

5. In case the transmission drive belt breaks during operation, and if the machine is on a slope, the machine will freewheel down the slope. To main- tain control, immediately (1) Release the steering levers and simultaneously (2) Move the FSC to the NEUTRAL-PARK position. When the ma- chine is stopped or moving slowly, engage the parking brake.

NOTE: This is exactly the same procedure used to normally stop and park the 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 the machine if these controls are in the OPERATING position).

12. When moving forward, do not suddenly put the tractor in reverse by rapidly pulling on the steering levers, especially when going downhill, as this can lift the tractor tail wheel off the ground and set up a bucking motion due to operator overcontrol. If bucking does occur, immediately stop the bucking action by pulling the Forward Speed Control (FSC) lever into the NEUTRAL-PARK position.

13. Disengage the blade drive when transporting the machine across drives, sidewalks, etc. Never

raise the mower deck while blades are rotating.

DANGER

Do not mow or drive the tractor within 5 feet (1.5 meters) of an embankment or retaining wall with drop off.

Safety Instructions - Operating

14. The maximum recommended slope operating angle is 15 degrees or 26% grade. When

operating the machine on a slope, reduce speed and use caution to start, stop, and maneuver. T o prevent tipping or loss of control of the machine, avoid sharp turns or sudden changes in direction.

Do not operate the machine on a slope greater than 15 degrees.

15. Never adjust cutting height while the mower is moving. Before adjusting cutting height or

servicing, move the Forward Speed Control (FSC) into the NEUTRAL-PARK position, en- gage the parking brake, and disengage the blade clutch (PTO). Tractor should not be mov ing while adjusting cutting height.

NOTE: The blade/PTO brake should normally stop drive line rotation within ve (5) seconds of dis engaging the PT O clutch.

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

ate with the grass deector shield removed.

Keep the deector in the low est possible position.

17. When using the tilt-up deck, observe the following recommendations:

19. If the cutting blades strike a solid object or the machine begins to vibrate abnormally,

immediately disengage the blade clutch (PTO), stop the engine, and wait for all moving parts to stop. To prevent accidental starting,

disconnect the spark plug wires. Thoroughly 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 bolts are torqued to 64 lb·ft (87 N·m).

20. Do not touch the engine or mufer while the engine is running or immediately after stop ping the engine. These areas may be hot enough to cause serious burns.

21. When leaving the machine unattended, disen-

gage the blade clutch (PTO), stop the engine, and remove the key .

a. Do not move tractor with deck in tilt-up

position.

b. Never tilt body forward with deck in tilt-up

position.

18. In case of a clogged or plugged mower deck: a. Disengage the blade clutch (PTO), set the

parking brake, and turn the engine off before leaving the seat.

b. LOOK to make sure blade drive shaft move-

ment has stopped before trying to unclog the

system. c. Disconnect the spark plug wires. d. Never place hands under the deck - use a

stick or similar tool to remove clogged ma-

terial.

Safety Instructions - Maintenance

1. T o prevent accidental starting of the engine when servicing or adjusting the machine, remove the key from the ignition switch and disconnect the spark plug wires.

2. To reduce re hazards, keep the engine free of grass, leaves, excessive grease, and dirt.

3. Keep all nuts, bolts, and screws tight to ensure the machine is in a safe, working condition. Check the blade mounting bolts frequently , making sure they are tight.

4. Perform only maintenance instructions de- scribed in this manual. Unauthorized mainte-

nance operations or machine modications 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 jew-

elry or loose clothing.

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

Unauthorized maintenance operations or

modications to the engine may result in

unsafe operating conditions.

1 1. Use care when charging the battery or per-

forming maintenance on the battery and electrical system:

a. Make sure the battery charger is unplugged

before connecting or disconnecting cables to the battery .

b. Charge the battery in a well-ventilated

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

c. Keep sparks, ames, and smoking materi als

away from the battery at all times. To avoid sparks, use care when removing bat tery cables from posts.

d. Disconnect both battery cables before

unplugging any wiring connectors or making repairs on the electrical system.

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

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

8. Never attempt to disconnect any safety devices or defeat the purpose of these safety devices.

9. Do not change the engine governor settings or overspeed the engine. The governor has been factory-set for maximum-safe engine operating speed.

10. Use genuine factory replacement parts. Substitute parts may result in product malfunction and possible injury to the operator and/or others.

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.

8600-28

Location: Each End of Mower Deck Part Number: 8600-28

1. Warning – thrown object hazard

• Keep bystanders away from the machine when operating.

• Clear lawn of debris before operating.

• Keep any discharge deector in place and in

the lowest position.

2. Warning – rotating mower blades are a cutting/ dismemberment hazard to hands and feet.

• Keep all body parts away from rotating mower blades.

• Do not step on end of deck.

8600-12

Location: Engine Part Number: 8600-12

1. Warning – carbon monoxide (CO) poisoning hazard

• CO emitted by a running engine can be deadly.

• Do not operate indoors or in other enclosed areas.

Location: Deck Carrier Frame Part Number: 8600-15

1. Warning – lock deck tilt-up hinge before operating the machine.

8600-14

Location: Deck Carrier Frame Part Number: 8600-14

1. Warning – do not operate the machine with the deck tilted up.

9804-1

Location: Chassis Member Behind Transaxles Part Number: 9804-1

1. Neutral Lock

• Lift and move into slot to unlock transmission and allow machine to freewheel.

8746-2

Location: PTO Guard on Deck Part Number: 8746-2

1. Grease PTO shaft joints every 8 hours.

8600-5

Location: Rear Body Near Mufer Part Number: 8600-5

1. Warning – hot surface, do not touch

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.

Location: Deck Housing Under Footrest Part Number: 2749-3

1. Deck drive belt routing

Location: T op of Deck Housing Part Number: 8653-1

5848-2

Location: Deck Discharge Shield (DSD60) Part Number: 5848-2

1. Warning – thrown object hazard

• Always keep the discharge shield in the lowest position when operating.

• Do not remove the discharge shield.

Location: Adjacent to Left Fuel T ank Part Number: 2010-4

1. Fuel tank selector/fuel shut-off valve.

1. W arning – secure deck with straps and engage parking brake before transporting or trailering with deck tilted up.

4.75

4.25

3.75

3.25

2.75

2.25

1.75

5.0

127

121

4.5

114

108

4.0

102

3.5

3.0

2.5

2.0 51

1.5381.0

1.25 32

inch

2748-1

Location: Deck Height Adjuster Part Number: 2748-1

1. Move pin to desired height of cut.

Location: Engine Shroud Part Number: 5855

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.

8600-2

Location: Flex Coupler Guard in Front of Engine Part Number: 8600-2

1. Warning – entanglement and cutting/dismemberment hazards

• Keep away from rotating shafts, belts, and other components.

Location: Right Fender Part Number: 2802-2

Location: Underside of Rear Body Part Number: 2107-4

1. Ground drive belt routing

2. PTO clutch belt routing

DO NOT OVERTIGHTEN

TIGHTEN UNTIL CONTACT WITH FRAME

THEN LOOSEN ONE TURN

Location: Chassis Member Behind Transaxles Part Number: 2351-8

1. Forward Speed Control

• Move lever forward to increase speed; back to stop.

2. Body Tilt Latch

• Raise lever to release.

• Lift at back of body to raise.

3. Blade Clutch Lever

• Move lever forward to engage PTO clutch; back to disengage.

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.

IMPORTANT

Fuel Recommendations

10% Ethanol maximum 15% MTBE maximum 87 Octane or higher (R+M)/2 (AKI) 90 Octane min (RON)

Location: Rear Body , Left Side Part Number: 5082-5

1. 2. 3.

Location: Front Body Adjacent to RH Steering Lever Part Number: 2807-2

1. Low Engine Oil Pressure Warning Light

2. High Oil/Cylinder Head Temperature Light

3. Service Engine Soon Light

5082-5

Location: Left Fender Part Number: 2802-3

1. Throttle

2. Parking brake

• Move lever forward to engage Parking Brake; back to disengage.

Location: Battery Hold-Down Bar Part Number: 5844-2

Assembly Instructions

SETUP INSTRUCTIONS

Walker Mowers are shipped partially assembled to our distribution network, and are typically assembled by the selling dealer. For any additional assembly besides the following, contact your Walker dealer .

Battery Service

CAUTION

Important Battery Service, Installation, and Changing Tips:

• Do not allow the battery cables to touch

opposing terminals. When connecting battery cables attach the positive (+) cable to

positive (+) battery terminal rst, followed

by negative (-) cable to negative (-) battery terminal.

Battery Location

IMPORTANT: Make sure battery is securely mounted

in the frame. A loose battery may cause damage to the case resulting in acid leakage and se vere damage to the machine. A hazard may be cre ated by damage to critical working parts and safety systems.

• Never start the engine when 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 an-

other source. Electricity uctuations can

damage the ECU (Electronic Control Unit).

• Always disconnect negative (-) battery

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

Raise mower body up for battery access. Check the battery for electrolyte level and charge. The electrolyte level should be at the bottom of the vent wells [1/4 to 1/2 in. (6 to 13 mm) above plates]. If the spe-

cic 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.

Wet Battery Service

If the battery has been shipped wet, but the electrolyte level is low or the battery needs to be charged 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 Service

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 techni cian can activate the battery safely . DO NOT attempt to activate the battery unless you are experienced in battery service work. The following activation and charg ing instructions are provided for use by a trained battery technician.

Assembly Instructions

DANGER

Battery Charging

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.

To ll (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 lling with electrolyte.

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

 Remove the ller caps and carefully ll each cell

until the electrolyte is just above the plates.

3. After the battery is lled with electrolyte, replace

the ller caps and charge the battery. Refer to

Battery Charging.

DANGER

BA TTERIES PRODUCE EXPLOSIVE GASES

• Charge the battery in a well-ventilated

area, so that gases produced while charging can dissipate.

• Keep sparks, ames, and smoking mate

rials away from the battery at all times.

• Make sure the battery cap vents are open

after the battery is lled with acid (check

manifold vent on each cap).

• Make sure the battery charger is un-

plugged before connecting or disconnecting cables to the battery .

IMPORTANT: Always disconnect the negative (-)

battery terminal before charging. Failure to do so can result in damage to the ECU.

 Charge the battery at 15 amps for 10 minutes.

DO NOT exceed 20 amps maximum recom-

mended charging rate. Charge until specic

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 overll the battery.

Electrolyte will overow through the vented

caps onto parts of the machine and WILL result in severe corrosion.

3. Install battery.

Mower Deck Assembly

Deck Caster Wheels Installation

1. Remove the bolts and washers from each deck caster wheel.

2. Install wheel on fork using bolts and washers.

3. Tighten the bolts and washers.

Assembly Instructions

Deck Caster Wheel Installation

Deck Discharge Deector Shield Installation

(DSD60)

Attach the side discharge deector shield using two

(2) 3/8-16 x 1-1/4 in. bolts, 3/8-16 ESNA nuts, and

3/8 in. wave spring washers. The wave washers t

between the two hinging surfaces. Tighten the nuts until the shield moves freely but is not loose.

WARNING

PTO Shaft Guard Installation

Position the shaft guard as shown and mount with two (2) 1/4-20 x 1/2 in. bolts.

Carrier Frame Tube Sockets

Attach

Guard

PTO Shaft Guard Installation

Tilt-Up Roller Wheel Installation

Mount the two (2) tilt-up roller wheels on the brackets on the rear skirt of the deck housing using the P/N 8490 axle bolt, 3/8 in. wave spring washer and 3/8-16 in. Whiz locknut. Tighten the axle bolt until the wheel rolls freely , but is not loose.

DO NOT operate the machine without the

grass deector shield attached and in the

lowest possible position.

Attach Shield

Deck Discharge Shield Installation

Roller Wheel

Roller Wheel Installation (DSD60 Shown)

Assembly Instructions

Mower Deck Installation on Tractor

Deck Installation

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

Deck Support

Arms

Mower Deck Installation

2. Engage the LH deck carrier frame tube socket

rst on the tractor support arms and then the RH

tube socket. Slide the deck onto the support arms and install lynch pins to secure deck.

3. Retract the spring-loaded quick disconnect ring on the PTO Coupler and insert the Coupler Installation Tool (provided in Owner’s Packet) as shown in the photo below.

Coupler

Installation T ool

PTO Coupler

Tube

Retract Spring-Loaded Quick Disconnect Ring

PTO Coupler Installation T ool

4. Reaching under the tractor, slide the PTO coupler tube onto the deck drive shaft (align arrow decals), then install the coupler quick disconnect onto the tractor PTO drive shaft.

5. Remove Installation Tool from quick disconnect ring and make sure the ring has “snapped” securely on the spline shaft.

NOTE: The Coupler Installation Tool is provided for convenience, but is not required for installation.

Retract Coupler Ring

Installation T ool Removal

IMPORTANT: DO NOT operate tractor with

Coupler Installation Tool installed.

Assembly Instructions

IMPORTANT: To prevent damage to the mower, make sure the PTO quick disconnect is securely locked on the tractor, with the locking balls fully seated in the groove and the ring in the locked position (refer to the Quick Discon- nect Ring “Locked” Position illustration). After installation, pull on the PTO coupler to check for security .

Coupler Ring in

Released Position

PTO Coupler

U-Joint

Quick Disconnect Ring “Released” Position

PTO Drive

Shaft

7. With the counterweight springs connected, the weight on the deck caster wheels should be 200 to 250 Ib (90.7 to 1 13.4 kg); this adjustment is preset at the factory. If required, the spring tension can be adjusted by tightening or loosening the elastic stop nuts lo cated underneath the lower spring hook, or contact your local dealer if additional help is required. Refer to Deck Coun- terweight Spring Installation photo.

Lynch Pins

Lock Deck On

Support Arms

(Not Visible)

Deck Counterweight Spring Installation

Counterweight Springs

Clip Onto Body

With Body Tilted Up

Spring T ension Adjustment

Nut Located Under Lower Spring Hook (Not Visible)

Internal Balls

Locked on Shaft

PTO Coupler

U-Joint

Quick Disconnect Ring “Locked” Position

6. Raise the mower body (instead of lifting the front of deck) and clip the counterweight springs to the receptacle on front of body. Lower the body to tension the springs. (Refer to Deck Counter- weight Spring Installation photo.)

Coupler Ring in

Locked Position

PTO Drive

Shaft

Assembly Instructions

Deck Leveling

1. Position mower on a smooth, level surface. Set the cutting height to the highest position - 5 in. (127 mm) - for easy access under the deck to measure blade height. Refer to ADJUSTING

CUTTING HEIGHT in Operating Instructions. NOTE: A block of wood cut 5 in. (127 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.

Height Adjustment

Rod

Should Not V ary More

Than 1/8 in. (3 mm)

Side-to-Side

2. Check the side-to-side level. Rotate the out side blades sideways and measure the distance from blade tip to ground on each side. If measurements vary more than 1/8 in. (3 mm), adjust the height adjustment rod on the high side to level the deck.

3. Check the front-to-rear level. Rotate the cen ter blade to point forward. Measure the distance from blade tip to ground on the front and rear. The rear of the blade should be 1/16 to 1/8 in. (2 to 3 mm) higher than the front of the blade; remove the chain from the deck height adjuster clevis and adjust equally to achieve at least 1/16 in. (2 mm) difference. Reinstall chains.

NOTE: The mower deck and support frame are jig welded; within normal tolerances, very little, if any, adjustments should be required to level the deck. Tire pressure will inuence the levelness of the deck. Check the tire pressure as a possi ble cause of the deck not being level.

Rear

Rod End

Should be 1/16 in. (2 mm)

to 1/8 in. (3 mm) Higher at the Rear of the Blade

Front

Rod End

Use Front Clevis to

Raise or Lower for

Front-to-Rear Level

5 in. (127 mm)

Wood Block

Front

Rod End

Deck Leveling

Rear

Rod End

5 in. (127 mm)

Wood Block

Use Front Clevis to Raise or Lower

for Front-to-Rear Level

Assembly Instructions

PREOPERA TING CHECKLIST

Before operating the mower for the rst time, and as

a routine before daily 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 fuel and lubricants refer to Specications. FILL FUEL TANK Fill the fuel tank using clean, fresh, automotive grade

unleaded gasoline (87 octane rating mini mum) or gasohol (up to 10% ethyl alcohol, 90% unleaded gasoline by volume). See engine manual for complete fuel recommendations.

DANGER

Handle gasoline with care. Gasoline is high-

ly ammable and its vapors are explosive.

Use safe refueling procedures:

• DO NOT ll fuel tank with the engine run-

ning.

• If the engine is hot, allow to cool before

refueling.

CHECK ENGINE CRANKCASE OIL LEVEL

Check the engine crankcase oil level before use and

after each 8 hours of continuous operation. Refer to LUBRICATION for Checking Engine Crankcase Oil

Level in Maintenance Instructions.

CHECK AND SERVICE ENGINE AIR CLEAN-

ER SYSTEM

• Check air lter restriction gauge to make sure the

yellow indicator disk is in the safe operating (green) range.

• Check condition, cleanliness, and security of the

complete air cleaner system (inspect air lter every 100 hours). For detailed procedures, refer

to CLEANING the Engine Air Cleaner System in Maintenance Instructions.

CHECK ENGINE COOLING SYSTEM Check that the engine cooling air intake screen is free

of obstruction by grass clippings or debris and clean

if required. Also, cylinder head cooling ns should be

inspected and cleaned if any build-up of debris is noted [remove two (2) cylinder head ac cess panels to inspect and clean].

Check performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder

heads, and feeling the cooling airow.

• Use an approved fuel container .

• Fuel the mower outdoors.

• DO NOT smoke while refueling.

• A void spilling fuel; use a funnel or spout.

• DO NOT overll the fuel tank(s); ll 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 tanks. Wipe dirt from around

the ller cap(s) before removing. Use a clean fuel

storage container and funnel. IMPORTANT: DO NOT mix oil with gasoline.

Always use fresh, automotive grade unleaded gasoline or gasohol. DO NOT use premium, white, or high-test gasoline. DO NOT use additives, such as carburetor cleaners, deicers, or moisture removing agents. DO NOT use gasoline blended with methyl alcohol.

DANGER

Make sure to keep hands clear of exhaust

pipe, mufer, and moving parts when checking airow.

CHECK SECURITY OF DRIVE TIRE MOUNT-

ING NUTS

The eight (8) Drive Tire mounting nuts should each be torqued to 75 to 85 lb·ft (102 to 1 15 N

INSPECT FOUR (4) DRIVE BEL TS

Engine/PTO (3) and Ground Drive.

CHECK HYDROSTATIC TRANSAXLE OIL

LEVEL

Refer to LUBRICATION for Transaxle Lubrication in Maintenance Instructions.

·m).

Assembly Instructions

CHECK TIRE PRESSURE

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

CHECK FUNCTIONS OF WARNING LIGHTS

AND WARNING HORN

Turn the ignition key to the RUN position. Oil Pressure Warning Light, Engine Service Light, Over Temperature Warning Light, and W arning Horn should all operate, indicating normal function.

CHECK FUNCTION OF SAFETY INTERLOCK

SWITCHES

Refer to Operating Instructions to check for proper operation of safety switches, both during engine starting and with the operator leaving the seat with tractor moving forward or with mower blades engaged.

CHECK AND CLEAN GRASS BUILDUP

UNDERNEA TH MOWER DECK

Refer to CLEANING the Grass Buildup in Mower Deck Housing in Maintenance Instructions for deck tilt-up and deck cleaning information.

Tilt-Up Hook and Latch Connected

Tilt-Up

Latch

Tilt-Up Hook

Deck Secured in TIL T -UP Position

CAUTION

Do not operate machine with locking arms disengaged.

DANGER

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

The tilt-up deck can be secured in the raised position by disengaging the locking arms 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 locking arms after lowering the deck to the normal operating position.

DANGER

Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position.

CHECK MOWER BLADE CONDITION,

SHARPNESS, BALANCE, AND SECURITY OF MOUNTING

The blade mounting bolt should be tightened to 64 lb·ft (87 N·m). If blade sharpening is required, refer to

CHECKING/SERVICING for Sharpen Mower Blades in Maintenance Instructions.

ADJUST MOWER CUTTING HEIGHT, IF

REQUIRED

Refer to ADJUSTING CUTTING HEIGHT in Oper-

ating Instructions.

PERFORM ANY ADDITIONAL PROCEDU RES

called for on the MAINTENANCE SCHEDULE CHART in Maintenance Instructions.

Operating Instructions

CONTROL IDENTIFICA TION, LOCA TION, AND FUNCTION

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 efcient opera

tion of the mower.

Ignition Switch

The ignition switch is located on the right front of the body and is used to start and stop the engine. 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 restart attempt. Prolonged cranking can damage the starter motor and shorten battery life. Release the key when the engine starts, and it will return to the RUN position. To stop the engine, rotate the key counterclockwise to the “O” position.

OFF

Ignition Switch

START

Forward Speed

Control (FSC)

Blade Clutch

(PTO)

Body

Latch

Ignition

Switch

Operating Controls

Parking

Brake

Throttle

Steering

Levers

Hourmeter

Operating Instructions

Engine Throttle

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

Throttle

Throttle Location

Body Latch

Forward Speed Control (FSC)

Forward Speed Control (FSC) has two functions: One is to set forward travel speed, and the other is to establish the NEUTRAL-PARK position. When the FSC lever is moved into the FORWARD position, a friction lock holds any forward speed setting from 0 to 10 mph (0 to 16 km/h). The ground speed is proportional to the lever position; the further 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. To stop and park the machine, the FSC lever is moved backward to the NEUTRAL-PARK position.

The front portion of the tractor body hinges forward for maintenance access and is latched down in the OPERATING position. To raise the body, pull back on body latch and lift body from the rear of the machine.

Body Latch

Operating Instructions

Steering Levers

Each drive wheel is controlled by its own independent steering lever, for both steering function and FORWARD/REVERSE motion. The FSC lever sets the maximum forward speed, and also sets the forward 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 rst slow down, stop, and then reverse

with a full backward lever stroke. The levers are released to the FORWARD position for “straight- ahead” ground travel.

NOTE: Pushing forward on the steering levers will not cause any change in tractor motion - there will be no steering lever reaction and there will be no machine damage.

Blade Clutch (PTO)

The blade clutch lever has two positions. Pulling the lever FORWARD engages the PTO that drives the mower blades. Pulling the lever BACKWARD

disengages the PT O and engages the blade brake.

Parking Brake Engaged

Parking Brake

The parking brake functions by locking a detent arm internally into the transaxle. Moving the lever FOR- WARD engages the parking brake; moving the lever BACKW ARD releases the brake.

IMPORTANT: Stop the tractor completely before engaging the parking brake. The parking brake uses a positive mechanical lock similar to the PARK posi tion on an automotive automatic transmission. If the tractor is moving when the brake is engaged, it will result in sudden stoppage and possible internal damage to the transaxle.

NOTE: If pressure on the parking brake (e.g. parked on a hill) makes it impossible to release the parking brake with the parking brake lever, move the mower gently forward or backward to allow the brake detent to release.

Parking Brake Disengaged

Operating Instructions

Oil Pressure Warning Light

The oil pressure warning light indicates that engine 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 light 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 operation, stop the engine immediately and correct the source of the problem before further engine operation.

IMPORTANT: Continued operation of the engine with an illuminated oil pressure warning light MAY cause severe engine damage (if a low oil pressure condition exists).

Engine Service Light

The engine service light indicates that the engine Electronic Control Unit (ECU) has detected a fault in the engine performance. When this light illuminates during operation, contact an authorized Kohler Service dealer to diagnose the fault.

IMPORTANT: Continued operation of the engine with an illuminated engine service light will result in sub-standard performance and MAY cause engine damage if not corrected as soon as possible.

Over T emperature Warning Light

The over temperature warning light indicates that the engine cylinder head temperature is above the safe operating limit (450° F or 232° C) and the en- gine is overheating. If this light comes on, there may be a problem with the engine cooling system

(material packed into cylinder head cooling ns,

clogged air intake screen, etc.). Stop the engine and correct the source of the problem before further operation:

IMPORTANT: Continued operation of the engine with an illuminated over temperature warning light MAY cause severe engine damage if a high cylinder head temperature condition exists.

Oil Pressure

Warning Light

Over T emperature

Warning Light

Engine Service

Light

Engine W arning Lights

Operating Instructions

Transaxle Lockout Rods

The transaxle lockout rods disengage the transaxles. By lifting the rods up and locking them into place with the shoulder on the rod in the chassis notch, the transaxles are released to permit freewheeling. By releasing the rods and recessing them back toward the chassis, the transaxles are engaged for normal operation. The transaxle rods in the LOCKOUT position are used to enable moving the machine without the engine running (e.g., for service). Refer to TRANSAXLE LOCKOUTS in this section for operating instructions.

NOTE: The transaxle lockout rods ends should be completely retracted against the chassis, otherwise operation of the transaxle may be erratic.

Hydro Lockout

Rods

Hydro Lockout Rod Location

Hourmeter

The hourmeter, which is located on the right front of the body, displays operating time accumulated while the ignition switch is in the ON position.

The hourmeter provides maintenance reminders after certain hours of operation. The hourmeter screen

will start ashing the reminder one hour prior to the

recommended interval and will continue until one hour after the recommended interval (two hours). The hourmeter does not have a manual reset

function.

Procedure Interval* Reminder

Oil Change (Break-In)**

Lubricate and Check Levels

Oil Change

4-6 Hours

24-26 Hours

49-51 Hours***

C H

OIL

LUBE

C H

OIL

* These intervals reect the actual time that the

reminder will ash (one hour prior to and one

hour after the recommended interval).

** This reminder is only used one time. *** In normal operating conditions, oil changes in

100-hour intervals are acceptable. Walker and the engine manufacturers recommend engine oil changes every 50 hours in extremely dirty or dusty conditions or for units with less than 100 hours annual use.

NOTE: The blinking hour glass on the display means that the meter is operating properly.

Hourmeter

Operating Instructions

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

LEFT WHEEL

STEERING LEVER

Forward Position

(No Control Change)

Neutral-Park

Position

Reverse Drive

Wheel Motion

Position

THROTTLE

Fast

Throttle

Position

Idle

Position

RIGHT WHEEL

STEERING LEVER

FORWARD SPEED

CONTROL LEVER (FSC)

Full Forward

Ground Speed

Position

Intermediate

Ground Speed

Position

Neutral-Park

Position

Engaged

Position

Disengaged

Position

P ARKING BRAKE

Operating Controls (T op View from Drivers Point of View)

2802-3

Engaged

Position

Disengaged

BLADE CLUTCH

Position

(PTO)

Operating Instructions

ST ARTING 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 DISEN-

GAGED.

IMPORTANT: DO NOT crank the engine con-

tinuously for more than 10 seconds at a time. If the engine does not start, turn the key to the OFF position and allow a 60 second cool-down period between starting attempts. Failure to fol low these guidelines can damage the starter motor and shorten battery life. Contact your Walker dealer or authorized Kohler dealer for additional help.

ADJUSTING GROUND SPEED AND STEERING

CAUTION

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

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

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 out of neutral, or the blade clutch (PTO) engaged. If the engine cranks otherwise, the safety system is not working and should be repaired or adjust ed before operating the mower. DO NOT disconnect safety switches; they are for the operator’s protection.

2. Move the throttle 1/4 to 1/2 open (toward FAST). Turn the ignition switch to the START position to start the engine. Release the key to RUN position as soon as the engine starts.

DANGER

Keep feet on footrest at all times when the machine is moving. Never operate the tracto r without a deck or imp lement installed.

Operating Instructions

Beginning Recommendations are: ♦ Learn operation of the mower in an open

area away from buildings, fences, and ob-

structions. Learn operation on at ground

BEFORE operating on slopes.

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 lever in position since a friction lock maintains the selected lever position (and forward travel speed).

♦ Start maneuvering the mower with SLOW 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 the inside wheel to stop and twist on the grass. Pull the steering le ver controlling the inside wheel into reverse for a smooth “rolling” turn (one wheel roll ing forward while the other rolls backward).

♦ Practice maneuvering the mower until you can make it go exactly where you are aiming.

♦ Remember, for an emergency stop, or in case of loss of control, machine movement can always be stopped quickly by pulling the Forward Speed Control into the NEU TRALP ARK position.

WARNING

In case the transmission drive belt breaks 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 , en gage the parking brake.

NOTE: This is exactly the same procedure used

to normally stop and park the machine. NOTE: If the FSC lever will not stay in the se-

lected position, the friction lock needs to be adjusted. Refer to ADJUSTMENTS for Step 7 - Forward Speed Control Friction Adjustment in the Maintenance Instructions.

CAUTION

A safety interlock switch (seat switch) will cause the engine to stop if the FSC is out of the NEUTRAL-PARK position and the operator is not in the seat. The function of this switch should be checked by the operator raising off the seat with the tractor moving forward (allow a 1/2 second off the seat for the time delay function); the engine should stop. If the safety sys tem 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.

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 possibility of overcontrol, use only one hand on both steering levers.

Operating Instructions

Pull Steering

Levers with

Left Hand

Keep Feet on

Footrest when

Moving

Forward Speed Control

(FSC)

Correct Operator Hand Position on the Controls

3. Reverse direction of the mower by pulling both levers backward.

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

WARNING

When moving forward, DO NOT suddenly put the tractor in reverse by rapidly pulling on the steering levers, especially when going downhill, as this can lift the tractor tail wheel off the ground and set up a bucking motion due to operator overcontrol. If bucking does occur, immediately stop the bucking action by pulling the Forward Speed Control (FSC) lever into the NEUTRAL-P ARK position.

4. The FSC may be adjusted forward for faster ground speed and backward for slower ground speed. When mowing, ground speed should be adjusted to match the load on the cutter blades, i.e., as the engine pulls down in 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.

NOTE: If the tractor creeps forward or back ward with the FSC lever in the NEUTRAL-PARK posi- tion, the transmission control needs to be adjusted. Refer to ADJUSTMENTS for Step 3 - Neutral

Position Adjustment in the Maintenance Instruc- tions.

ENGAGING THE BLADE DRIVE

1. Set the engine throttle at about 1/3 speed. 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. Engage the blade clutch by moving the blade clutch lever forward SLOWLY. For disengage- ment, move the blade clutch lever backward

SLOWLY.

CAUTION

An operator presence 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 op erator 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 the mower across drives, sidewalks, loose materials, etc. DO NOT engage the

blade clutch with the PTO shaft disconnected

(the mower deck removed from tractor).

5. Stop ground travel by pulling both steering levers backward to the NEUTRAL-PARK position (tractor not moving) and then moving the FSC lever to the NEUTRAL-PARK position.

Operating Instructions

Blade Clutch Engaged

2. Slow the engine to idle; put the throttle in the IDLE 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 increased wear of the brake band.

WARNING

A brake stops the cutter blades from free-

wheeling within ve (5) seconds after dis

engaging the clutch. If the brake system malfunctions and the blades do not stop

within ve (5) seconds, the brake should

be repaired or replaced before operating the mower. Contact your W alker dealer .

Blade Clutch Disengaged

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. Also, make sure the blade retaining bolts are torqued to 64 lb·ft (87 N·m).

4. Turn the ignition switch OFF.

WARNING

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

5. Engage the parking brake. Also, engaging the parking brake is recommended when stopping

or parking the machine in a conned space with

little tolerance for movement. IMPORTANT: The transaxles 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 transaxles, es-

pecially when transmission uid is warm.

STOPPING THE MACHINE

1. Pull the steering levers to the NEUTRAL-PARK position and then move the FSC lever backward to the NEUTRAL-PARK position.

Operating Instructions

WARNING

ADJUSTING CUTTING HEIGHT

WARNING

Never adjust cutting height while the mower is moving. Before adjusting cutting height or servicing, move the Forward Speed Control (FSC) into the NEUTRALP ARK position, engage the parking brake, and disengage the blade clutch (PTO). Tractor should not be moving while adjusting cutting height.

NOTE: The emergency stop procedure is exactly

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

FUEL SELECTOR V ALVE

The tractor is equipped with dual fuel tanks. A fuel selector valve regulates which tank is being utilized. The valve is located on the left hand side of the engine. The valve switches between the LH and RH gas tanks. DO NOT run tank dry before switching tanks.

Cutting height is adjusted from operators seat using the height pedal to assist in raising the deck while positioning the height adjustment lever and hitch pin.

1. Disengage PTO and stop tractor .

2. Push down on height pedal until it latches in the full up position.

3. Select desired height by moving the hitch pin to the desired height.

4. Push down on the height pedal and lift up on the height adjustment lever. Slowly release the height pedal while lifting the lever until there is no pressure on the pedal.

Fuel Selector Valve

Cutting Height Adjustment

Transport Position

1. Disengage the PTO.

2. Push down on height pedal until it latches in the full up position.

Operating Instructions

Height PedalHitch Pin

Height

Adjustment Lever

Hydro Lockout Rod

Cutting Height Adjustment Components

TRANSAXLE LOCKOUTS IMPORT ANT : DO NOT TOW this mower faster than

2 mph (3.2 km/h) with the transmission lockout engaged. Towing can produce excessive internal pressure and damage the transaxle(s).

To move the mower with the engine NOT running (dead battery, maintenance, etc.), the transaxles should be unlocked (released).

1. Raise the body .

2. Pull up the transaxle lockout rods on both the RH and LH transaxles and secure into place by shouldering both rods in the chassis notch area.

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

Hydro Lockout Rod

Hydro Lockout Rod - Normal Operating Position

RECOMMENDA TIONS FOR MOWING

DANGER

Do not mow around overhanging tree branches or bushes at the same height as the operator’s torso and head where inadvertent contact may cause injury .

Hydro Lockout Rod - Freewheel Position

4. After moving the mower , release the rods, placing them in the normal OPERATING position. The transmission rod ends should be com pletely retracted against the chassis, otherwise operation of the transmission may be erratic.

Avoid Low Hanging Branches

Operating Instructions

IMPORTANT: Operate the engine at full throttle when mowing, to allow the engine to produce full

horsepower and to increase efciency of the engine

cooling system.

• Keep the mower deck and discharge shield clean.

• Mow with sharp blades. A dull blade tears 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 appearance, cut off 1/3 or less of existing grass height.)

• When mowing, operate the engine at full throttle

for the best cutting action. Mowing with a lower engine RPM causes the mowing blade to not cut clean and tear the grass. The engine is designed to be

operated at full speed.

• When mowing in adverse conditions (tall and/or

wet grass), mow the grass twice. Raise the mower to

the highest setting - 5 in. (127 mm) - for the rst pass

and then make a second pass cutting to the desired height.

• Use a slow setting on the FSC for trimming op-

erations.

• Make sure the mower is leveled properly for a

smooth cut. Refer to Deck Leveling in Assembly In-

structions.

• Using the DSD60 deck, or other side discharge

decks, the side discharge deector shield must not be removed and must be kept in the lowest possible

position to deect grass clippings and thrown objects

down ward. Orient the side discharge away from side walks or streets to minimize cleanup of clippings. When mowing close to obstacles, orient the side dis charge away from obstacles to reduce the chance of damage to property by thrown objects.

Discharge

Shield

Side Discharge Deector Shield in

Lowest Position

• When operating on a slope, reduce speed and

use caution to start, stop, and maneuver. Avoid

sharp turns or sudden changes in direction. The

maximum recommended slope operating angle is 15 degrees or 26% grade.

• 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 smooth control movements of the steering levers since the transaxles 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

Slope - Do Not Operate

on Steep Slopes

15°

60 in.

Maximum Recommended Slope

16 in.

Operating Instructions

DANGER

RECOMMENDA TIONS FOR TIL T -UP DECK OPERATION/TRANSPORT

Do not mow or drive the tractor within 5 feet (1.5 meters) of an embankment or retaining wall with drop off.

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) may be damaged by moving the tractor.

The tilt-up conguration 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 position. This can cause the deck to unhook from the tractor and fall with considerable force, potentially causing deck or tractor damage and/or bodily injury .

• When transporting a tractor with the deck 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 (caus ing breakage). This will also prevent the deck from unhooking from the tractor and falling, potentially causing deck or tractor damage. Damage to other items parked in front of the deck may also occur.

5 FT

MINIMUM

No Driving Zone

Maintenance Instructions

CAUTION

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

MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERV ALS - MODEL MBS29

Service Item

Check Engine Crankcase Oil Level x 42 Check/Clean Engine Air Cooling System* x 50 Check Air Filter Restriction Gauge x 48 Clean Grass Buildup Under Deck x 51 Service Mower Blades x 55 Check Security of Air Filtration Components x 54 Check Transaxle Housing Condition x 53 Check Function of Warning Lights and Horn x 25 Lubricate Grease Fittings and Oil Points* x 45 Check Tire Pressure x 55 Check Drive Belts (Engine/PTO, Ground Drive) x 56 Check Operation of Safety Interlock Switches x 57 Check Battery Electrolyte Level x 54 Check Transaxle Oil Level (in Reservoir) x 44 Change Engine Crankcase Oil** Check Air Filter Element*** x 49 Clean Engine Cooling Fins x 50 Check Security of Drive Tire

Mounting Nuts (75 to 85 Clean Transaxle Housing x 53 Check FSC Friction Lock x 57 Check Blade Brake Action x 57 Check Operation of Turbine Precleaner Fan* x 48 Change Engine Oil Filter x 42 Check/Regap Spark Plugs x 56 Replace Fuel Filter x 61 Change Transaxle Oil and Filter Check Fuel Lines and Clamps x 57 Replace Air Filter Element

and Dust Ejection V alve*** Service Battery x 54 Service Solenoid Shift Starter x Check PTO U-Joints for Wear/Looseness x 57 Replace Fuel Lines and Clamps x 57 Replace Ignition Wires x 56

lb·ft)

Daily

Hours

100

Hours

x 55

200

Hours

400

Hours Yearly

ΔΔ

x 49

Every

2 Years

Ref.

Page

ΔΔΔ

∗ More often in extremely dusty or dirty conditions (Refer to notes about air cleaner element in IMPORTANT TIPS FOR CARE OF THE KOHLER ENGINE)

∗∗ Change engine oil and lter after rst 8 hours of operation of a new engine (break-in period)

∗∗∗ Air cleaner is remote mounted Cummins/Fleetguard

OptiAir™ unit, replace lter every year

Δ Change oil every 50 hours when operating

in dry, dirty conditions

ΔΔ Initial oil and lter change at 75100 hours

ΔΔΔ See your Walker dealer for this service or refer to the

Walker Service Manual

CAUTION

When performing maintenance with the tractor body raised, a safety prop should be installed from back of body to chassis frame (fail-safe protection in case of fail ure of body lift support).

Maintenance Instructions KOHLER TIPS

IMPORT ANT TIPS FOR CARE OF THE KOHLER ENGINE

Fuel System

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

ganic material.

• Change fuel lter on a regular basis and when con-

tamination is suspected or found in the fuel.

• The fuel pump module is a sealed unit and is not

serviceable; opening the fuel pump module will void the warranty . Additionally , the fuel pump module and the fuel lines between it and the injectors are pressurized. For service of the pressurized fuel system including the fuel pump module, fuel lines, and fuel injectors contact your Walker dealer or authorized Kohler service dealer.

Starting/Stopping

• Start engine with the throttle advanced off idle

to a mid-point (1/4 to 1/2) throttle setting. This will aid starting, especially in cold weather.

• Keep the battery fully charged.

• Match crankcase oil viscosity to the ambient tem-

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

• Position the throttle control between half and full

throttle, then stop the engine.

Cooling System

CAUTION

DO NOT use a pressure washer to clean the cooling system on an air-cooled engine, mud may form under the cooling shroud on the cylinder head and cooling fan.

• Keep engine air intake screen and cylinder head

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

damage.

• Periodically remove two access panels in the en-

gine shroud to inspect and clean cylinder head cool-

ing ns.

• Check performance of the cooling system by start-

ing the engine, holding a hand adjacent to the cylin-

der head, and feeling the cooling airow.

Make sure to keep hands clear of exhaust

pipe, mufer, and moving parts when checking airow.

• Operate the engine at full speed when mowing.

This allows the engine to produce full horsepower and move more cooling air through the engine cool-

ing ns.

Air Cleaner System

• Use only Cummins/Fleetguard air cleaner

elements. Aftermarket elements may not seal in the air cleaner housing, allowing dirt to enter the engine.

Also, aftermarket lters often skimp on the ltration

media and require more frequent replacement (see following instructions).

• Use the air lter restriction gauge to indicate the

need to service the air lter.

• Do frequently check the Turbine Precleaner for

free movement of the internal fan.

• DO NOT overservice or frequently “disturb” the

air lter. A dirty air lter actually cleans better than a new one. Changing the air lter too often can ac tually reduce lter efciency and increase the oppor tunity

for traces of dust to enter the engine. Wait until the element really needs servicing as indicated by the air

lter restriction gauge.

• When the air lter 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 lit tle dirt left here will be sucked into the engine and reduce engine

life). When the lter 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.

Oil

• Use only multi-viscosity oils as specied with the

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

• Use only Kohler oil lters. Aftermarket lters

may not seal properly and/or have the incorrect pressure relief valve for proper lubrication.

DANGER

Maintenance Instructions LUBRICATION

LUBRICATION

WARNING

DO NOT attempt to lubricate the machine 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. The oil should be changed after the initial engine break-in period of 5-8 hours. Thereafter, change oil after every 100 hours of operation.

Checking Engine Crankcase Oil Level

Check the engine crankcase oil level before use and

after each 8 hours of continuous operation.

IMPORTANT: DO NOT operate engine without

a sufcient oil supply in the crankcase. DO NOT operate with oil level below the LOW mark or above the FULL mark on the dipstick.

Full

Mark

Operating

Range

{

Low

Mark

IMPORTANT: The importance of checking and maintaining the proper crankcase oil level cannot be overemphasized. Check the oil level BEFORE

EACH USE.

1. Park the mower on a level surface with the engine stopped. Also, make sure the engine is cool

and oil has had time to drain into the sump (allow at least ve (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 clean rag, then reinsert the dipstick into the tube and tighten.

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 LOW mark and the FULL mark).

Dipstick Operating Range

5. If additional oil is needed, refer to Specications for proper crankcase lubricant. Fill to the FULL

mark. IMPORTANT: DO NOT overll the crankcase (oil

above FULL l evel) as this CAN result in engine overheating, loss of power, and possi ble engine damage.

Changing Engine Crankcase Oil/Oil Filter

Change the engine crankcase oil after every 100 hours of operation and the oil lter after every 200 hours of operation as follows:

1. Park the mower on a level surface with the engine stopped. The engine oil should be warm

before draining. If not warm from opera tion, start the engine and run a few minutes to warm the oil.

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

Maintenance Instructions LUBRICATION

3. Remove the dipstick and open oil drain valve, and drain the oil into a suitable container. Be sure to allow ample time for complete drainage.

4. Before removing the oil lter, clean the area around the lter to keep dirt and debris out of the

engine.

5. Remove the old oil lter and wipe off the lter

mounting surface on the engine.

Oil Fill Dipstick

Oil Drain

Dipstick, Oil Fill and Oil Drain Locations

(View from Above Left Side of T ractor)

7. Install the new oil lter on the engine. Turn the oil lter clockwise until the rubber gasket con tacts the sealing surface, then tighten the lter an

additional 1/2 to 3/4 turn.

8. Close the oil drain valve and tighten until snug. Do not overtighten.

9. Fill the crankcase with new, clean oil. Use only crankcase lubricants recommended by the engine manufacturer. Refer to Specications in 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 to FULL mark on the dipstick; crankcase capacity is 1.9 quarts (1.8 liters) when changing oil and

lter.

IMPORT ANT : Check the dipstick reading before adding the last 1/2 pint of oil and ll only to the FULL mark. The oil level should never be over the FULL mark on the dipstick; overlling can re- sult in engine overheating and loss of power.

10. Start the engine and check for oil leaks around

the oil lter. Stop the engine, recheck the oil lev-

el, and add oil if necessary . (When the engine is

rst operated with a new oil lter, the oil level will drop slightly as the lter is lled with oil.)

Oil Filter

Oil Filter Location

(View from Above Right Side of T ractor)

6. Apply a thin coating of new oil to the rubber gas-

ket on the replacement oil lter.

IMPORTANT: Use ONLY oil lters from the en-

gine manufacturer. Aftermarket oil lters may not

seal properly and/or may not have the cor rect pressure relief valve for proper lubrication.

Maintenance Instructions LUBRICATION

Mower Deck Spindle Lubrication Lubricate each deck spindle grease tting every 25

hours. Use SAE general purpose lithium or molyb-

denum base grease for grease ttings.

DRD52 or DSD60 Mower Deck Lubrication

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

Transaxle Lubrication

• The transaxle oil lubrication is SAE 20W-50 (API

Service Class SL or higher) engine oil.

• Inspect both transaxle cases and hoses after

every 100 hours of operation for visible leaks.

• The uid levels for each transaxle can be checked

visually by looking at the uid levels in each expansion reservoir. When the transaxles are cold, the uid

level in the expansion reservoirs should be between 1/4 and 1/2 in. (0.64 cm and 1.27 cm).

Transaxle Oil and Filter Change Change the transaxle oil after the initial break-in pe-

riod of 75-100 hours. Thereafter, change oil every 400 hours of operation as follows:

1. Thoroughly clean the exterior of the transmission housing before servicing. Remove expansion tank cap to allow venting. Using a 1/4 in. hex wrench, remove the plug on the lower inside of each transaxle allowing the oil to drain.

2. Remove the oil lter guard, remove and replace

the oil lter using an oil lter wrench. Tighten lter by turning lter 3/4 to 1 turn after gasket contacts the lter base surface. Reinstall the oil

lter guard. (Refer to Transaxle Oil Drain Plug,

Filter, and Guard Location illustration.)

Oil Filter

Reservoir Cap

Hot Level

Cold Level

Hose

Expansion Reservoir Location

Oil Filter

Guard

Transaxle Oil Drain Plug, Filter , and

Guard Location

(Shown with Deck Support Arms

Removed for Clarity)

3. Reinstall drain plug.

4. Remove the oil reservoir hose attached to the elbow on top of the transaxle. Remove the elbow

to access the oil ll opening.

5. Fill the transaxles with 20W-50 (API Service Class SL or higher) oil through the opening where the elbows were. Fill up to the opening.

6. Before reinstalling the elbows, screw the locking nut on the elbows down until they are snug (the o-ring on the elbow will be to the bottom of the o-ring groove).

Oil Drain

Plug

Maintenance Instructions LUBRICATION

Grease Fitting and Oil Point Lubrication

Elbow

Reinstall Transaxle Elbows

7. Reinstall the elbows. When the elbow begins to be snug, position the elbow as it was when removed and tighten the locknut. Reinstall reservoir hoses to elbows.

Screw Locking

Nut Down

Lubricate the grease ttings and oil points after every 25 hours of operation. Lubricate more often when

operating in dusty or dirty conditions. Use SAE general purpose lithium or molybdenum base grease

for grease ttings 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 joints (on the deck and trac tor)

require routine lubrication after every 8 hours of running time.

NOTE: The best way to lubricate the PTO tube half of the universal joint assembly is to remove it from the tractor. See instructions for removing and install ing PTO quick coupler , refer to Deck Installation in Mow-

er Deck Installation on Tractor in the Assem bly In- structions.

8. Fill both reservoirs 1/4-1/2 in. (6-13 mm) using 20W-50 (API Service Class SL or higher) oil.

9. Start and drive the unit for 1- 2 minutes.

10. If the transaxle sounds noisy or has poor steering response, there may be air trapped in the transaxle. Follow purge instructions below.

11. To purge air from the transaxle, raise unit and block with tires off the ground. With engine running, slowly move Forward Speed Control forward and backward 5 to 6 times. Turn of f engine and check oil level and add if needed. Repeat procedure until transaxle operates at normal noise levels and move smoothly in forward and reverse.

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 Front Deck Lift Pivot Grease 2 4 Rear Deck Lift Pivot Grease 2 5 Pivot Assembly, Tilt-Up Deck Grease 2 6 Deck Support Arm Socket Grease 2 7 Steering Lever Pivot Grease 2 8 Deck-to-PTO Coupling Grease 1 (Grease Spline Slide Area) 9 Deck Support Arm Pivot Grease 2

10 Universal Joint Tube Assembly Grease* 1 11 FSC Lever Pivot Grease 1 12 Hydro Idler Arm Pivot Grease 1 13 Clutch Actuator Push Rod Grease 1 14 Body Latch Pivot Oil 2 15 PTO Clutch Lever Pivot Grease 1

Ident Lubrication No. No. Location T ype Places

16 Clutch Arm Pivot Grease 1 17 Transaxle Oil Reservoir Oil 2 18 Throttle Control Cable Ends Oil 2 19 Engine Dipstick Oil** 1 20 Tail Wheel Caster Fork Pivot Grease 2 21 Rear Axle Pivot Grease 1 22 Rear Wheel Bearing Grease 2 23 Engine / Oil Filler Oil** 1 24 PTO Belt Tightener Pivot Grease 1 25 Parking Brake Pivot Grease 1 26 Throttle Control Pivot Oil 1 27 Universal Joint Shaft Assembly Grease* 1 28 Blade Spindles Grease 3

* Grease every eight (8) hours. ** Refer to Engine Oil located on page 42.

NOTE: DRD52 Tilt-Up Deck is shown for reference. For other

Deck Lubrication Points, refer to Deck and Carrier Frame Illustrated Parts Manual.

Maintenance Instructions LUBRICATION

4 5 6

18 & 26

25 14

4 5

7 8

13 14

23 20

15 16

20 21

Chassis and Deck Lubrication Points

Maintenance Instructions CLEANING

CLEANING

CAUTION

If a pressure washer is used on the exposed working parts, avoid water on the electrical parts and the engine cooling system.

Engine Air Cleaner System

There are two main components in the engine air cleaner system: a turbine precleaner and a Cummins/Fleetguard OptiAir™ air cleaner. Each component is checked, cleaned and maintained on a differ-

ent schedule based on the ltering action required.

Each component is serviced as follows:

T urbine Precleaner

The turbine precleaner is mounted on the Cummins/ Fleetguard air cleaner. A spinning fan driven by the

intake airow separates dust from the air, giving the

initial stage of air clean ing. Dust particles are exhausted through a single small vent in the side of the housing. Since no dust is trapped, the precleaner operates without clean ing.

The only maintenance required is to check the operation of the internal fan every 100 hours. Verify operation:

1. Look into the exhaust vent while shining a light 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.

Cummins/Fleetguard OptiAir™ Air Cleaner

A remote mounted Cummins/Fleetguard OptiAir™

air cleaner provides the air ltering function. The primary lter element slides over an outlet tube

inside the air cleaner canister with radial sealing action, eliminating the possibility of dust leaks due to

improper lter installation. Intake design, internal bafing, and a dust ejection valve provide dust

separation and automatic precleaning action. Daily or frequent servicing of the air cleaner is not

required. Use the air lter restriction gauge on the

air cleaner outlet to indicate when the air lter needs servicing -- a yellow indicator will show when the lter is overly restricting airow into the engine.

Precleaner

Hose

Clamp

Cummins/Fleetguard

Air Cleaner

Air Filter

Restriction Gauge

Hose

Clamp

Air Intake

Hose

Air Cleaner

Band

Safety

Filter

Primary Filter

Element

Hose

Clamp

Engine

8600-12

Cummins/Fleetguard

Air Cleaner Cover

Dust Ejection

Valve

Engine Air Cleaner System Components

Maintenance Instructions CLEANING

IMPORTANT: Use only Cummins/Fleetguard air

lter elements for replacement (Walker 2090-1 and 2090-3). Aftermarket lters may not seal properly or lter efciently.

Canister

Primary

Filter Element

Air Cleaner Components

(Shown with Cover Removed)

IMPORTANT: The Cummins/Fleetguard air cleaner

uses a dry paper-type air lter element. NEVER ap- ply oil to the paper element.

1. Lift Mono Latch Twist Lock™ and twist the OptiAir™ cover to the left into the “open” position to remove the air cleaner cover. W ash the cover and dust ejection valve. Check that these components are in good condition. The dust ejection valve is subject to wear and deterioration and should be replaced yearly or when damaged. The lips of the valve should close and

t together; any cracks, deformation, or wear in

the valve is cause for replacement.

2. Remove the primary lter element by pulling it out

of the canister. There will be some initial resis-

tance as the lter seal breaks loose and slides off

of the outlet tube. Gently move the end of the

lter 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 lter is removed.

3. Replace the primary lter element.

NOTE: Washing the element in water or clean ing solution is not recommended. Do not try to clean the element with compressed air.

Air Filter

Restriction Gauge

Push Button to Reset

Indicator After Service

Air Filter Restriction Gauge Location

Inspect the primary lter element after every 100 hours of service and replace the element and safety

lter yearly (or when dirty or damaged). More fre- quent replacement may be required when operating in extremely dusty conditions as indicated by the air

lter restriction gauge. Service the air cleaner as

follows:

4. Use a bright light inside the primary lter element

to inspect for damage. Check the element very carefully for pin holes or other damage that will allow dirt to leak through the paper media. Replace element if necessary .

5. Without removing, visually inspect the condition

of the safety lter for damage or holes. The safety lter should only be removed for yearly

replacement (or when dirty or damaged).

6. Check the condition and resilience of the radial sealing surface (inside of the open end) of the

primary lter element. Replace the element if any

cracks, tears, or other damage to the sealing surface are noted.

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 cleanness (this is the sealing surface).

Maintenance Instructions CLEANING

9. Insert and seat the safety lter and primary el-

ement carefully into the canister, applying pres-

sure at the outer rim of the lter; not at the exible center. Make sure the lter element is completely

in place before installing the cover. NOTE: DO NOT use petroleum based lubri cants

on the sealing surfaces of the lter elements; use

tal cum powder or dry silicone lubricants if re-

quired for lter installation.

Radial Sealing

Surface

Canister

Primary

Safety Filter

Filter Element

Air Filter Element Replacement

12. Reset the air lter restriction gauge (press button

on the end of the indicator).

Engine Cooling System

Cooling Air Intake System

To prevent engine overheating and possible engine damage, clean grass clippings, chaff, and dirt from the rotating engine cooling air intake screen after ev- ery 8 hours of operation. In certain mowing conditions (dry grass, leaves, tree “cotton”, etc.), it may be nec essary to check and clean the screen several times each day to prevent engine overheating.

CAUTION

Operating the engine with a blocked air intake screen, dirty or plugged cooling

ns, and/or cooling shrouds removed will

cause engine damage from overheating.

10. Install the cover with the word “DOWN” properly oriented to the bottom of the canister. T wist the OptiAir™ cover to the right and put into the “closed” position.

Mono Latch

Twist Lock™

DOWN

Orient to Bottom

of Canister

Dust Ejection

Valve

Proper Orientation of Air Cleaner Cover

1 1. Check the air intake hose for cuts, nicks, cracks,

etc., and the hose clamps for tightness.

Rotating Engine Cooling

Air Intake Screen

Keep Engine Screen Clean

Cylinder Head Cooling Fins

It is essential for performance and longevity of the air-cooled engine to keep the cylinder head cooling ns clean and free of obstruction. After every 8 hours of operation, check the performance of the cooling system by starting the engine, holding a hand adjacent to the cylinder head, and feeling the cooling

airow. If there is little or no airow, clean the cooling ns as described on the next page.

Maintenance Instructions CLEANING

DANGER

Make sure to keep hands clear of exhaust

pipe, mufer, and moving parts when checking airow.

Check Airow

with Hand

Cooling System Airow

Every 100 hours, inspect and clean the cooling ns

(more often when operating in extremely dusty , dirty

conditions). Remove the two (2) cooling n access panels in the engine shroud and clean the cooling ns

and external surfaces using compressed air. Make sure to reinstall the access panels before oper ating the engine.

IMPORTANT: Yearly, it is good maintenance practice to remove the engine cooling shroud and clean

the cylinder head cooling ns thoroughly to prevent

overheating and extend engine life. Make sure cooling shroud is reinstalled properly . This procedure will require removing the engine from the chassis.

Engine Cooling

Fin Access Panels

Kohler Engine

Shroud

Rotating Engine Cooling

Air Intake Screen

Rotating Engine Cooling Air Intake Screen

and Cooling Fin Access Panels

Grass Buildup in Mower Deck 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. Release hood latch assembly (2) and remove footrest.

2. Rotate locking arms upward on each side of the carrier frame to release carrier frame for tilting action.

Locking Arm Rotation

Maintenance Instructions CLEANING

3. Install tilt bar into front of deck.

Tilt Bar Installed

4. Using the tilt bar, raise deck to the TILT-UP posi- tion and insert the deck hook into the tilt-up latch on the tractor body .

Tilt-Up Hook and

Latch Connected

Tilt-Up

Latch

NOTE: While some degree of material buildup in the mower deck housing can be tolerated, a point

is nally reached where cutting quality deteriorates and clogging begins to occur because of

too much buildup on the bafing and housing.

DANGER

Do not operate the mower with deck in tiltup position. Do not move the tractor with the deck in the tilt-up position.

6. Lower the deck to the normal operating position and rotate locking arms downward.

7. Remove tilt bar and store on carrier frame.

8. Reinstall footrest by inserting locking ngers

under deck plate and reattaching hood latch assembly.

Footrest

Locking

Finger

Deck Plate

Tilt-Up Hook

Deck Secured in TIL T -UP Position

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

NOTE: If the buildup is severe, it may be easier to clean the deck by removing the deck assembly from the tractor and standing the deck assembly on its “nose”.

Hood Latch

Assembly

Footrest Installation

(Spindle Cover Removed for Clarity)

CAUTION

Do not operate machine with deck locking arms disengaged.

Maintenance Instructions CLEANING

Transaxle Housing

Keeping the housing on the transaxles clean and free of obstruction is essential to avoid overheat- ing the transmission uid and shortening transmis- sion life. The housing should be checked every 100 hours; and cleaned if necessary .

To clean the housing, use compressed air and/or a pressure washer. Pay close attention to any oily dirt buildup on the transaxle housings. This may be the result of an oil leak. If an oil leak is noticed, contact your local Walker dealer .

Cooling

Fins

IMPORTANT: In case an oil leak develops on the input shaft, the cooling fan blowing dusty air and oil on the transmission will quickly pack the cooling ns with oily dirt. If this condition occurs, contact your dealer immediately to avoid overheating and damaging the transaxle.

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

Cooling

Fans

Transaxle Cooling Fans

Transaxle Housing and Cooling Fins

Maintenance Instructions CHECKING/SERVICING

CHECKING/SERVICING

CAUTION

DANGER

Important Battery Service, Installation, and

To prevent accide ntal st ar ting of th e engine when servicing or adjusting the machine, remove the key fro m the ignition switch and disconnect the spark plug wires.

Security of Air Filtration Components NOTE: The following inspection is only an external

inspection and should be done without “disturbing” the ltration components.

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

Changing Tips for Electronic Fuel Injected engines:

• Do not allow the battery cables to touch

opposing terminals. When connecting battery cables attach the positive (+) cable to

positive (+) battery terminal rst, followed

by negative (-) cable to negative (-) battery terminal.

• Never start the engine when the cables

are loose or poorly connected to the battery terminals.

• Never disconnect battery while engine is

running.

1. Check the Cummins/Fleetguard OptiAir™ air cleaner canister for damage. Make sure the cover is in place and the cover latch is secure - do not run the engine without the air cleaner cover in place and secure.

2. Inspect the air intake hose for cracks, nicks, cuts, etc., and check the hose clamps for tightness.

3. Check to make sure the air lter restriction gauge

is in place and hose connections are secure.

Battery NOTE: For initial battery service during setup, refer

to Battery Service in Assembly Instructions. IMPORT ANT: 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 hazard may be created by damage to critical working parts and safety systems.

• Never use a quick battery charger to start

the engine.

• Never “jump start” the engine using an-

other source. Electricity uctuations can

damage the ECU (Electronic Control Unit).

• 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 electrolyte level should be checked after every 25 hours of operation. To check electrolyte

level:

1. Remove battery cell ller caps.

2. Check the electrolyte level. If the level is below

the bottom of the vent well, ll 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 ller caps.

IMPORT ANT: DO NOT overll the battery. Electro-

lyte will overow through the vented caps onto parts

of the machine and WILL result in severe corrosion.

Maintenance Instructions CHECKING/SERVICING

Cleaning the T erminals

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

Charging the Battery

DANGER

BA TTERIES PRODUCE EXPLOSIVE GASES

• Charge the battery in a well-ventilated

area, so that gases produced while charging can dissipate.

• Keep sparks, ames, 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 .

Wheel Nut T orque Check the eight (8) Drive Tire mounting nuts. Every

100 hours they should each be torqued to

75 to 85 lb·ft (102 to 1 15 N

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 type grass o r operatin g on sandy soils). Replace blades if worn, bent, cracked, or

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 yields a poor mowing job but slows the cutting speed of the mower and causes extra wear on the engine and blade drive by pulling hard.

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

2. Raise the deck and secure it in the TILT-UP posi tion (refer to Deck Secured in TILT-UP Po-

sition photo in CLEANING of Grass Buildup in Mower Deck Housing in this section).

·m).

DANGER

Check the battery charge by measuring the specic gravity of electrolyte; if specic gravity is less 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 recom-

mended charging rate. Charge until specic

gravity is at least 1.250. Total charging time should not exceed one (1) hour.

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

Tire Pressure

Inate tires to pressures shown below:

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

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

NOTE: PTO shaft must be disconnected

before checking blades for straightness.

3. Check the blades for straightness by marking the blade tip position inside 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.

WARNING

DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety .

Maintenance Instructions CHECKING/SERVICING

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 loos ening and removing the bolt and 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 le.

Blade Balancer

CAUTION

ALWAYS wear eye protection and gloves when sharpening a blade.

Sharpen at Original

30° Angle

30°

Do Not Grind or

Sharpen on Underside

Mower Blade Prole for Sharpening

6. Check blade balance by positioning the blade horizontally on a blade balancer or use a nail or shaft through the center hole. If either end of the blade rotates downward, grind (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.

Intersection

Wear Area

Wing Tip

Blade Balanced on Magnetic

Wall-Mounted Balancer

7. Mount the blade with wing tips pointing up into the housing. Reinstall the blade, washer, and bolt. Tighten the bolt to 64 lb·ft (87 N

Drive Belts

Raise the body and inspect the condition of the four (4) drive belts after every 25 hours of operation -engine/PTO drive (3) and ground drive (1). If the belts show signs of cracking or deteriorating, the belts should be replaced. Refer to REPLACING/REPAIR-

ING the Drive Belts in this section. Spark Plugs

Every 200 hours, remove the spark plugs, inspect,

clean, and reset the gap (or replace with a new plug). Clean spark plug with a wire brush. If the electrodes are burned short or pitted, replace the plug (refer to Specications for the proper type of replacement plug). Check the spark plug gap with a wire-type feeler gauge and set the gap to 0.030 in. (0.76 mm). Reinstall and tighten to 18 lb·ft (24 N·m). Both spark plugs should be replaced yearly .

Ignition Wires

·m).

Good preventive maintenance calls for complete re- placement of spark plug wires every two (2) years.

Maintenance Instructions CHECKING/SERVICING

Fuel Lines and Clamps NOTE: The fuel system after the fuel pump module

is pressurized and should only be serviced by a Walker dealer or authorized Kohler service dealer.

Every year, inspect the fuel lines from the tanks to engine for deterioration or damage. Also, inspect the fuel line clamps for tightness. Good preventive maintenance calls for complete 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 the whole machine.

Blade Brake Action

WARNING

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

There are three (3) safety interlock switches on the tractor; Seat Switch, FSC Neutral - Park Switch, and PTO Switch.

NOTE: There is a 1/2 second time delay function on the seat switch to avoid engine power interruption when driving over bumps.

If any of the following conditions occur during starting or operating, a safety interlock switch may be malfunctioning. Contact your Walker dealer for troubleshooting and/or replacement.

• With or without an operator in the seat, the engine

starts with the Forward Speed Control (FSC) and/or the PTO engaged.

• 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 con-

tinues to run with the Forward Speed Control (FSC) and/or PTO engaged.

• With an operator in the seat, the Forward Speed

Control (FSC) and PTO disengaged and horn works, but the starter is not engaging.

Check the function of the cutter blade brake by engaging the blade clutch (PTO), operating the engine at full throttle, then disengaging the clutch and measuring how quickly the blades stop. Watch the rotation of the blade drive shaft as a visual indi cation that movement has stopped. If the brake is working

properly, all rotation will stop ve (5) seconds after disengagement of the clutch. If the brake system

malfunctions -- blades do not stop in ve (5) seconds

-- adjust or repair the brake before operating the mower. Refer to ADJUSTMENTS for Clutch Disen-

gagement/Brake Action, Step 2 - Blade Brake Band Adjustment, on page 70.

Safety Switch System

WARNING

It is important to check and maintain the safety switch system for safe operation of the machine.

Forward Speed Control Friction Lock The FSC friction lock is designed to hold the select-

ed forward travel speed when the steering levers

are moved and yet the friction is not too heavy to make moving the FSC control difcult (too much friction). The procedure for checking the FSC friction lock is as follows:

1. Place the FSC in the full FORWARD position and pull both steering levers back; the FSC lever should not move. If the FSC lever moves back when the steering levers are pulled back, the

friction needs to be increased.

2. With the steering levers held back, move the FSC lever back from the FORWARD position. With a proper amount 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.

If the FSC friction lock needs to be adjusted, refer to

ADJUSTMENTS for Step 7 - Forward Speed Control Friction Adjustment in this section.

Maintenance Instructions REPLACING/REPAIRING

REPLACING/REPAIRING

DANGER

To prevent accidental starting of the engine when replacing parts or repairing 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.

Drive Belts

There are four (4) individual drive belts on the machine:

• Engine/PTO Belt (Matched Set of 3)

• Ground Drive Belt

The belts may be removed and replaced using the

procedures described on the following pages.

Ground

Drive Belt

Engine/PTO Belts

(Matched Set of 3)

Belt Locations (Engine Hidden for Clarity)

Maintenance Instructions REPLACING/REPAIRING

Engine/PTO Belt

1. T o remove an engine/PT O belt: a. Remove wire lock pins (4), open belt

guards.

Idler Arm

Upper LH

Guard

Lower LH

Guard

Wire Lock Pin

PTO

Pulley

b. Roll the belt off the pulley and remove the

belt.

Wire Lock Pins

Right Hand

Guard

Wire Lock Pin

PTO Belt

(Matched Set)

PTO Guard

Engine/PTO Belt (Belt Guards Open) (Engine Hidden for Clarity)

2. T o replace an engine/PT O belt: a. Reverse the removal procedure to replace

an engine/PTO belt.

Upper LH

Guard

Lower LH

Guard

Secure Wire Above T ab

b. Secure wire on lock pin above tab on lower

PTO guard and right hand guard.

Right Hand

Guard

Secure Wire in

Front of T ab

PTO Guard

Engine/PTO Belt (Belt Guards Closed) (Engine Hidden for Clarity)

Maintenance Instructions REPLACING/REPAIRING

Ground Drive Belt

1. T o remove the ground drive belt: a. Remove belt tensioner stop wing nut.

LH Transaxle

Idler Pulley

Ground Drive Belt Assembly (Disengaged)

Ground Drive

Belt

Raise Idler Pulley to

Relax Belt

b. Raise the spring-loaded idler to relax belt. c. Slide belt off pulleys, then release the idler.

Tension

Spring

Hydro Idler

Arm

Remove Belt T ensioner

Stop Wing Nut

RH Transaxle

Drive Pulley

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

Ground Drive

LH Transaxle

Idler Pulley

b. Make sure the belt tensioner stop bolt and

Belt

Hydro Idler Arm

T ensioner Stop

assembly is in place as shown. Adjust Belt Tensioner Stop by tightening wing nut until it touches the washer then back off one (1) turn.

Adjust Belt

RH Transaxle

Drive Pulley

Ground Drive Belt Assembly (Engaged)

Maintenance Instructions REPLACING/REPAIRING

Fuel Filter

Model MBS29 is equipped with a 10 micron in-line

fuel lter between the fuel tank and the fuel pump module. Replacement of this lter is recommended

every 200 hours of operation or more frequently under extremely dusty or dirty conditions.

In-Line

Fuel Filter

Fuel Filter Location

IMPORTANT: Replace the fuel lter only in a clean

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

Mower Blades

Mower blades are removed and remounted as described in the Sharpen Mower Blades instructions (refer to CHECKING/SERVICING to Sharpen Mow- er Blades in this section). During the course of sharpening and inspecting mower blades, if there are

any of the following conditions of wear or damage, blades should be replaced for reasons of safe-

ty and performance of the machine:

• An excessive amount of the at section of the

blade has been ground away (removed) when the blade is sharpened. Replace the blade when less than a 3/4 in. (19 mm) at section remains at the blade tip.

• Examine ends of the blade carefully, especially the

intersection where the at section of the blade turns

up to form the “wing tip” (refer to Mower Blade Pro-

le for Sharpening illustration in Sharpen Mower Blades instructions). Since sand and abrasive ma-

terial can wear metal away in this area, the blade should be replaced when metal thickness has

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

DANGER

Gasoline is extremely ammable and can

be highly explosive. T o minimize danger:

• Use only an approved fuel container for

gasoline.

• DO NOT allow open ames or sparks

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

• Wipe up spilled gasoline immediately

and completely .

1. Expand and slide clamps on either side of the

lter away from lter and pull fuel lines off lter.

2. Replace lter.

Maintenance Instructions REPLACING/REPAIRING

Reinstall the blades following procedure from Sharp-

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 serious potential for injury or damage.

en Mower Blades instructions. If blades are re- placed, always use Walker original equipment blades to ensure safety and optimum performance. The quality and performance of replacement blades offered by other manufacturers cannot be guar- anteed, they could be dangerous.

CAUTION

• Check the blades for straightness by marking

blade tip position inside the deck housing and then ro tating the opposite end of the blade to the same po sition 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 blade if any cracks are found.

WARNING

DO NOT try to straighten a blade that is bent. NEVER weld a broken or cracked blade. ALWAYS replace with a new blade to assure safety .

ALWAYS use genuine factory replacement parts. Substitute parts CAN result in prod uct malfunction and possible injury to the operator.

Maintenance Instructions REPLACING/REPAIRING

Replacing Deck Drive Belt

1. T o remove the deck drive belt: a. Remove deck footrest and two (2) covers

over the RH and LH blade spindles.

b. Loosen belt tensioner stop bolt and turn in-

ward until retracted 1 in. (2.5 cm) from the operating position.

c. Lock drive pulley so that it can not rotate.

* If deck is installed on tractor, the PTO

blade brake will prevent the drive pulley from rotating.

* If deck is detached from tractor, use pry

bar or large screwdriver positioned through the drive shaft U-joint to hold shaft and prevent rotation.

d. From a position on the LH side of the deck,

grasp belt midsection and pull to compress the belt tensioner springs and move the tensioning pulley inward. The belt will then slip off the LH spindle pulley and can be completely removed.

2. Install the deck drive belt by reversing the removal procedure:

a. Route the belt as shown on the belt routing

decal (located on the deck housing). Leave the belt loose at the LH spindle and then install the belt by compressing the belt tensioner as noted above.

b. After the belt is in place, reset the belt ten-

sioner stop bolt by turning outward until contacting the pulley bracket and then making one (1) additional turn.

c. Reinstall spindle covers and footrest.

Spindle

Cover

Pulley Moves Inward to Allow

Belt to Slip Off LH Blade Spindle

Belt T ensioner

Stop Bolt

Belt Routing Decal

Footrest

Spindle

Cover

Use Pry Bar or

Screwdriver Through

U-Joint to

Prevent Rotation

1.25 32

1.75

1.0

2.25 25

1.5

2.75 38

2.0

3.25 51

2.5

3.75 64

3.0

4.25

3.5

108

4.75 89

2748-1

4.0

121

102

4.5 inch

114

5.0 mm

127

8600-28

8746-2

Grasp Belt Here and

Pull from LH Side to

Compress Springs on

Belt T ensioner

8600-28

Deck Drive Belt Replacement

Maintenance Instructions ADJUSTMENTS

ADJUSTMENTS Transmission Control IMPORTANT: The proper adjustment of the tran-

saxle control stops is essential for efcient operation and life of the transaxle. These stops are properly ad justed at the factory and should only require read justment if the transaxle or related control linkage is removed or changed.

NOTE: It would not be unusual for a new machine, after the initial 5 or 10 hours of operation, to begin to not travel straight (this is due to the break-in of the

tran saxles). To ne tune tracking, refer to Step 5 -

Straight Tracking Adjustment in this section.

Step 1 - Steering Lever Position Adjustment NOTE: For proper operation, the steering levers

should be adjusted to sit evenly using the following procedure.

1. Examine the steering levers to make sure they are parallel front to back in relation to one an- other. If they are not equal, adjust accordingly. (The handles may or may not be even at this point.)

NOTE: The LH steering lever is non-adjust-

able. This procedure will require adjustment of the RH lever to make it even with the LH lever.

Levers should sit

parallel to each other

2. Adjust the position of the RH lever by turning the stop bolt in the Speed Control Actuator in or out. Turning the stop bolt in will make the RH lever move back, and turning it out will make it move forward. Tighten the locknut.

Stop

Bolt

Stop Bolt Location

Step 2 - Steering Handles Adjustment

1. An adjustment range of approximately 3 in. (76.2 mm) is available on the steering handles the handles can be adjusted forward or aft depending on the arm length of the operator. The handles can be adjusted by loosening the locknut at the pivot point and the locknut holding the handle in position in the adjustment slide. Adjust the handles into the most comfortable position and tighten both locknuts.

Locknut

(Position)

Adjustment

Slide

Locknut

(Pivot Point)

Lever Alignment

Steering Handles Adjustment

Maintenance Instructions ADJUSTMENTS

Step 3 - Neutral Position Adjustment

1. With the Forward Speed Control (FSC) in NEUTRAL-PARK, the lever should be straight up.

Adjust by loosening the jam nuts on the FSC Rod and turn the rod to attain the straight up position. Tighten the jam nuts.

2. Securely block the tractor up so the drive tires are off the ground.

3. Adjust the elastic stop nuts at the front of both control rods so that 2 or 3 threads are visible, then loosen the jam nuts on the ball joints at the back of the control rods.

Control Arm

Control Rods

Transmission Control Rod and Arm Location

(Front Body Hidden for Clarity)

FSC Position

Adjust Length of

Rod to Position

FSC Lever

Elastic Stop Nut (Adjusts

Length of Control Rod)

Control Rod

Jam Nut

Ball Joint

Maximum Speed

Adjustment Set Screw

Locating Stud

Transmission

Control Arm

FSC Lever Position Adjustment

Tracking Adjustment Components

Maintenance Instructions ADJUSTMENTS

WARNING

The following adjustments are made with the engine running. Keep all body parts and tools away from rotating and hot components, and secure all loose clothing.

4. With the body lowered and the FSC in NEUTRAL-PARK, start the engine. With the engine

at normal operating speed, check for movement of the drive wheels.

5. Lift the body to access the steering adjustment components.

NOTE: It may be necessary to tighten the FSC

friction adjustment if the transmissions are moved out of neutral when the body is raised. Refer to Step 7 - Forward Speed Control Friction Adjustment later in this section for location of the FSC friction adjustment nut.

6. Using a wrench on one elastic stop nut, rotate the control rod clockwise just until the wheel on that side begins to move forward. Then, count- ing the turns required, rotate the control rod counterclockwise just until the wheel stops and then begins to move in reverse. Rotate the control rod back clockwise half the number of turns required to make the wheel go from moving forward to reverse. The transmission is now centered in the neutral window. Tighten the jam nut on the ball joint and repeat the same procedure on the other transmission.

7. Turn off the engine, and then lower the drive tires onto the ground.

Step 4 - Full Forward Speed Adjustment

1. Move the FSC to the full FORWARD speed position.

2. Raise the body. The set screws in the left and right Transmission Control Arms should not be contacting the locating stud in the transaxle. If they are, back the set screws out until they do not touch.

T-Handle

Hex Wrench

Transmission

Control Arm

Maximum Speed Tracking Adjustment

(Shown with Parts Removed for Clarity)

Step 5 - Straight T racking Adjustment

1. Sit in the seat, start the engine, set throttle at full speed, and with the FSC in the NEUTRAL- PARK position check for movement of either drive wheel (if either wheel moves backward or for ward, refer to Step 3 - Neutral Position Adjust- ment and readjust).

2. Check for straight ground tracking on a level surface (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 line on ground for reference).

3. If travel is not straight, shorten the control rod on the slow side by turning the adjuster nut clockwise. If straight tracking and neutral can not be achieved, turn the adjuster nut counterclockwise until neutral can be achieved.

4. Lengthen the control rod of the faster side by turning the adjuster nut counterclockwise to match the slower side while maintaining the neutral position.

5. If the forward travel is straight throughout the speed range, except at maximum speed - place the FSC in full FORWARD, turn the set screw in the Transmission Control Arm, of the faster side, in until it contacts the hydro stud. (Turning the set screw in slows the wheel.) Turn the set screw in an additional 1/8 turn. Recheck for equal full for ward speed. Adjust this set screw until equal full forward speed is achieved. Tighten the jam nut.

Maximum

Speed Tracking

Adjustment

Maintenance Instructions ADJUSTMENTS

Step 6 - FSC Neutral Switch Adjustment

1. Place the FSC in NEUTRAL-PARK position. Loosen mounting screws and adjust switch up or down accordingly .

FSC Switch

FSC Neutral Switch Location

Switch Closed

in Neutral

FSC Switch

Actuator Arm

Deck Support

Arm (Ref)

Step 7 - Forward Speed Control Friction Adjustment

FSC Position with Levers

1. Place the FSC in the full FORWARD position and pull both steering levers back; the FSC lever should not move. If the FSC lever moves back the friction needs to be increased.

2. With the steering levers held back, move the FSC lever back from the FORWARD position. With a proper amount of friction adjusted, the FSC le ver should move back with a slight amount of re sistance (friction). If the FSC lever movement is “stiff”, the friction needs to be de-

creased.

Loosen Screws

NOTE: Adjust the switch downward for quicker activation.

FSC Neutral Switch Adjustment

(Side View Through Chassis)

IMPORTANT: Disconnect spark plug wires to

prevent the engine from starting when testing operation of the FSC Neutral Switch.

2. Check operation of the FSC Neutral Switch by placing the FSC lever fully forward, then holding the ignition switch in the START position. Slow- ly move the FSC lever back towards the NEU- TRAL-PARK position until the starter motor engages and note the position of the FSC lever. The FSC lever should be within 1/8 in. (3 mm) of the NEUTRAL-PARK position. If this distance is greater than 1/8 in. (3 mm) the FSC Neutral Switch needs to be adjusted downward for quicker activation.

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 the conditions of both steps 1 and 2 (above) are met.

FSC Friction

Adjustment Nut

FSC Adjustment Friction Nut

Maintenance Instructions ADJUSTMENTS

Blade Clutch (PTO)

Clutch Engagement/Belt T ension

The clutch engagement and PTO belt tension are adjusted using the clutch actuator link. After installing new PTO belts, after 10 hours and every 100 hours thereafter, check and adjust for the clutch spring assembly bolt head dimension as shown in the PTO Clutch Engaged illustration. If the clutch actuator link or clutch spring assembly have been disassem-

bled, rst reset them to their factory preset lengths

(as shown in the PTO Clutch Disengaged illustration) and then proceed with adjustment as follows.

Clutch Actuator

Link

Ball Joint

1/4 in. to 5/16 in.

(6.35 mm to 7.94 mm)

Adjust the length of the clutch actuator link to achieve a clutch spring assembly bolt head clearance of 1/4 in. to 5/16 in. (6.35 mm to 7.94 mm) with the clutch engaged. To adjust length: remove ball joint from clutch arm and shorten the clutch actuator link to increase this measurement, or lengthen the clutch actuator link to decrease this measurement. If adjustments are needed more frequently than every 100 hours to maintain dimensions, it may suggest problems with pulley wear or belt misalignment.

Blade Clutch

Engaged

Clutch Spring Assembly

(Spring Compressed)

Clutch Engagement

Arm

Blade Clutch

Idler Pulley

Clutch Arm

Front of Mower

PTO Clutch Engaged

Maintenance Instructions ADJUSTMENTS

Use the following procedures to check and adjust clutch disengagement and brake action:

Step 1 - Idler Pulley Maximum T ravel Adjustment

Loosen the brake band adjustment nut allowing clutch pivot stop arm and stop bolt to make contact

6-1/4 in.*

(158.75 mm)

Clutch Actuator

Link

6 in.*

(152.4 mm)

Clutch Spring Assembly (Spring Uncompressed)

*NOTE: Factory preset dimensions. Reset to these dimensions prior to adjustment if components have been disassembled.

Knuckle Joint

2-1/8 in.*

(53.98 mm)

(refer to Blade Brake Band Adjustment illustration).

1. To check the pulley travel, rst engage the clutch,

then measure the distance the pulley travels as the clutch is disengaged and the stop arm contacts the stop bolt.

2. Adjust the pivot stop bolt to give 1-5/8 in. to 1-3/4 in. (41 mm to 44 mm) pulley travel from “clutch engaged” to “clutch disengaged”.

NOTE: This adjustment will prevent excessive pulley travel that can cause belts to develop too much slack, causing possible belt derailment upon disengagement.

1-5/8 in. to 1-3/4 in.

(41 mm to 44 mm)

CLUTCH DISENGAGED CLUTCH ENGAGED

PTO Clutch Disengaged

Clutch Disengagement/Brake Action

WARNING

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

The declutched or disengaged position of the blade clutch idler pulley is adjustable and is set to give belt release without excessive slack and to apply the blade brake. The blade brake is activated by the brake band connected to the clutch engagement arm. The brake is designed to stop the blades

within ve (5) seconds after disengaging the clutch.

Idler Pulley

Clutch Pivot

Stop Bolt

Brake Engagement

Arm

Clutch Idler Pulley Travel

Clutch Pivot

Stop Arm

Maintenance Instructions ADJUSTMENTS

Step 2 - Blade Brake Band Adjustment

After the maximum pulley travel is set, adjust the working travel of the clutch idler pulley by adjusting the brake band nut and make the following adjustment as needed:

1. Adjust the blade brake band, using the adjustment nut until pulley travel is approximately 5/8 in. to 3/4 in. (16 mm to 19 mm) from engaged to disengaged.

NOTE: As blade brake band/drum wears, pulley travel will increase and it will be necessary to adjust the blade brake band nut to maintain these dimensions.

Blade Brake

Band

CLUTCH DISENGAGED CLUTCH ENGAGED

5/8 in. to 3/4 in.

(16 mm to 19 mm)

Clutch Idler Pulley Travel Adjustment

Blade Brake

Band Adjustment Nut

Blade Brake Band Adjustment

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 ve (5) seconds,

check the following: a. Make sure clutch and brake linkage are

working freely (no binding). b. Check the brake band lining for wear. c. Check the brake drum on the pulley. If ex-

cessive wear is present, it will be necessary

to replace worn parts.

Chassis Mount

(Ref)

LIMITED W ARRANTY

FOR

W ALKER MODEL MBS29

RIDER MOWER

1. WHAT THIS W ARRANTY 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 workmanship within one (1) year* after date of sale 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 W alker’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 Hydro-Gear Transaxles Battery Tires

The available warranties covering these items are furnished with each mower. W alker does not assume any warranty obli gation, liability

or modication for these items, which are covered exclusively by the stated warranty of the respective man ufacturers noted above.

* A three (3) year or 3000 hour (whichever comes rst) warranty is offered for Hydro-Gear ZT3400 hydrostatic transmissions; covers full

cost of replacement up to 1000 hours of use, and after 1000 hours warranty coverage is prorated against 3000 hours.

2. WHAT THIS W ARRANTY 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 Operator’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 SER VICE UNDER THIS W ARRANTY :

Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Man ufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to verify warranty coverage.

4. WARRANTY LIMIT ATION:

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 LA W ANY AND ALL IMPLIED W ARRANTIES 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 INCIDENT AL, 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 warranty shall apply and no dealer, distributor, or individual is authorized to amend,

modify, or extend this warranty in any way . Accordingly , additional statements such as dealer advertising or presentations, whether oral or written, do not constitute warranties by Walker , and should not be relied upon.

D. This warranty gives you specic legal rights, and you may also have other rights which vary from state to state.

WALKER MFG. CO. • 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 • (970) 221-5614

Walker Mowers, MBS29 Operator's Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Foreword

Table of Contents

General Information ________________ 1

Safety Instructions __________________ 9

Assembly Instructions ______________ 18

Operating Instructions _____________ 26

Maintenance Instructions __________ 40

Warranty ___________________________ 71

General Information

HIGHLIGHTED INFORMA TION

GLOSSARY

IDENTIFYING NUMBER LOCA TIONS

Tractor Serial Number Location

SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS

Mower Deck Serial Number Location

ENGINE SERIAL NUMBER LOCA TION

ENGINE

ELECTRICAL SYSTEM

TRANSMISSION

BLADE DRIVE

TIRE SIZE

DRIVE BELTS

SEAT Contour-Molded, with Nylon Backed Vinyl Cover and

FRAME/BODY CONSTRUCTION

Front View and Right Side View

Rear View and Left Side View

T op View (Body Raised)

BEFORE OPERA TING

SAFETY, CONTROL, AND INSTRUCTION DECALS

SAFETY, CONTROL, AND INSTRUCTION DECALS

SAFETY, CONTROL, AND INSTRUCTION DECALS

SAFETY, CONTROL, AND INSTRUCTION DECALS

Assembly Instructions

SETUP INSTRUCTIONS

Battery Service

Battery Location

Wet Battery Service

Dry Battery Service

Battery Charging

Mower Deck Assembly

Deck Caster Wheels Installation

Deck Caster Wheel Installation

PTO Shaft Guard Installation

PTO Shaft Guard Installation

Tilt-Up Roller Wheel Installation

Deck Discharge Shield Installation

Roller Wheel Installation (DSD60 Shown)

Mower Deck Installation on Tractor

Deck Installation

Mower Deck Installation

PTO Coupler Installation T ool

Retract Coupler Ring

Installation T ool Removal

Quick Disconnect Ring “Released” Position

Deck Counterweight Spring Installation

Quick Disconnect Ring “Locked” Position

Deck Leveling

Deck Leveling

PREOPERA TING CHECKLIST

Deck Secured in TIL T -UP Position

Operating Instructions

CONTROL IDENTIFICA TION, LOCA TION, AND FUNCTION

Ignition Switch

Ignition Switch

Operating Controls

Engine Throttle

Throttle Location

Body Latch

Forward Speed Control (FSC)

Body Latch

Steering Levers

Blade Clutch (PTO)

Parking Brake Engaged

Parking Brake

Parking Brake Disengaged

Oil Pressure Warning Light