Walker Lawn Mower MW 15 HP User Manual

OWNER’S MANUAL  
Safety, Assembly, Operating, and Maintenance Instructions  
and ILLUSTRATED PARTS MANUAL  
Model MW - Walk-Behind (15 HP)  
Please Read and Save These Instructions  
For Safety, Read All Safety and Operation  
Instructions Prior to Operating Machine  
Effective Date: 11-01-03  
P/N 9001  
Price $5.00  
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Table of Contents  
Operating Instructions_____________ 21  
Owner’s Manual  
CONTROL IDENTIFICATION,  
General Information ________________ 1  
LOCATION, AND FUNCTION _____________ 21  
Operating Controls ___________________ 21  
Engine Throttle/Choke ________________ 21  
Forward Speed Control (FSC) __________ 22  
Pistol Grips/Steering Control Levers_____ 22  
Blade Clutch (PTO) ___________________ 22  
Parking Brake _______________________ 22  
Engine Cover Latch___________________ 22  
Transaxle Lockout Rods_______________ 22  
Hourmeter __________________________ 22  
Circuit Breaker_______________________ 22  
Ignition Switch _______________________ 23  
STARTING THE ENGINE_________________ 23  
ADJUSTING GROUND  
SPEED AND STEERING _________________ 23  
ENGAGING THE MOWER________________ 25  
STOPPING THE MACHINE _______________ 25  
ADJUSTING CUTTING HEIGHT ___________ 26  
TRANSAXLE LOCKOUTS________________ 26  
RECOMMENDATIONS FOR MOWING ______ 27  
RECOMMENDATIONS FOR  
HIGHLIGHTED INFORMATION _____________ 1  
GLOSSARY ____________________________ 1  
IDENTIFYING NUMBER LOCATIONS________ 1  
ENGINE SERIAL NUMBER LOCATION ______ 2  
SERVICING OF DRIVETRAIN GEARBOX ____ 2  
Specifications _______________________ 3  
ENGINE________________________________ 3  
ELECTRICAL SYSTEM ___________________ 3  
TRANSMISSION_________________________ 3  
BLADE DRIVE __________________________ 4  
TIRE SIZE ______________________________ 4  
TIRE PRESSURE ________________________ 4  
DIMENSIONS (Tractor and Mower) _________ 4  
MOWER DECK__________________________ 5  
CURB WEIGHT__________________________ 5  
DRIVE BELTS___________________________ 5  
FRAME/BODY CONSTRUCTION ___________ 5  
TILT-UP DECK OPERATION/TRANSPORT __ 28  
Component Identification___________ 6  
Maintenance Instructions__________ 28  
Safety Instructions __________________ 9  
IMPORTANT TIPS FOR CARE OF THE  
BEFORE OPERATING____________________ 9  
OPERATING___________________________ 10  
MAINTENANCE ________________________ 11  
SAFETY, CONTROL,  
KAWASAKI ENGINE ____________________ 28  
Fuel System _________________________ 28  
Starting/Stopping ____________________ 28  
Cooling System ______________________ 28  
Air Cleaner System ___________________ 28  
Oil _________________________________ 28  
MAINTENANCE SCHEDULE CHART_______ 29  
LUBRICATION _________________________ 30  
Engine Oil___________________________ 30  
Engine Break-In Oil __________________ 30  
Checking Engine Crankcase Oil Level ___ 30  
Changing Engine Crankcase Oil/Oil Filter 30  
Grease Fitting and Oil Point Lubrication__ 31  
Mower Deck Gearbox Lubrication _______ 31  
DSD52 Mower Deck Lubrication ________ 32  
Tractor PTO Gearbox Lubrication _______ 33  
Checking Gearbox Oil Level ___________ 33  
Transaxle Lubrication _________________ 33  
Steering Linkage and  
AND INSTRUCTION DECALS _____________ 13  
Assembly Instructions _____________ 14  
SETUP INSTRUCTIONS _________________ 14  
Tire Installation (Tractor)_______________ 14  
Battery Service_______________________ 14  
Battery Charging ____________________ 14  
Mower Deck Assembly ________________ 15  
Deck Caster Wheels Installation ________ 15  
Deck Discharge Shield Installation ______ 15  
PTO Shaft Guard Installation __________ 16  
Tilt-Up Roller Wheel Installation ________ 16  
Mower Deck Installation on Tractor ______ 16  
Deck Installation ____________________ 16  
Deck Leveling ______________________ 18  
PREOPERATING CHECKLIST ____________ 19  
PTO Linkage Lubrication ______________ 33  
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Table of Contents  
CLEANING ____________________________ 36  
Engine Air Cleaner System _____________ 36  
Foam Precleaner Element _____________ 36  
Paper Precleaner Element ____________ 36  
Engine Cooling System________________ 36  
Air Intake Screen ____________________ 36  
Engine Cooling Fins _________________ 36  
Grass Buildup in Mower Housing________ 36  
CHECKING/SERVICING _________________ 37  
Battery______________________________ 37  
Charging the Battery _________________ 37  
Tire Pressure ________________________ 37  
Sharpen Mower Blades ________________ 37  
Drive Belts __________________________ 38  
Mower Deck Gearbox Oil Seals _________ 38  
Spark Plugs _________________________ 38  
Fuel Lines and Clamps ________________ 38  
Blade Brake Action ___________________ 39  
REPLACING/REPAIRING ________________ 40  
Drive Belts __________________________ 40  
PTO Drive Belt _____________________ 40  
Ground Drive Belt ___________________ 40  
Blade Overload Shear Bolts ____________ 41  
PTO Shear Pin _______________________ 41  
Mower Blades________________________ 41  
Mower Deck Gearbox Replacement ______ 42  
ADJUSTMENTS ________________________ 43  
Blade Clutch (PTO) ___________________ 43  
Clutch Disengagement/Brake Action _____ 43  
Transmission Control _________________ 44  
FSC Actuator Stop Adjustment _________ 44  
Control Arm Rod Adjustment ___________ 45  
Neutral Adjustment __________________ 45  
Tracking Adjustment _________________ 45  
Control Handle (Pistol Grip) Adjustment __ 46  
Handlebar Height Adjustment___________ 46  
Tilt-Up Deck Adjustable Stop ___________ 46  
Carburetor___________________________ 47  
Maintenance And Service  
Record Sheet_______________________ 61  
Operator’s Notes___________________ 62  
Warranty___________________________ 63  
Illustrated Parts Manual  
BODY / CHASSIS ASSEMBLY ____________ 48  
MAIN COMPONENT  
POWER TRANSMISSION ________________ 50  
ENGINE GROUP _______________________ 52  
FORWARD SPEED &  
STEERING CONTROLS__________________ 54  
SULKY ATTACHMENT___________________ 56  
ELECTRICAL ASSEMBLY________________ 58  
WIRING SCHEMATIC____________________ 60  
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General Information  
HIGHLIGHTED INFORMATION  
SIDE DISCHARGE (SD) mows but does not  
collect the mowed material.  
Walker Manufacturing recommends that any service  
requiring special training or tools be performed by  
an authorized Walker Mower Dealer. There are sev-  
eral general practices to be aware of in the area of  
safety. Most accidents associated with the oper-  
ation or maintenance of a Walker product are  
caused by disregarding basic safety precautions or  
specific warnings. Such accidents, in most cases,  
can be prevented by being aware of the dangers  
present.  
TRACTOR is the prime mover, including the en-  
gine, drive train, and controls to operate the  
mower.  
IDENTIFYING NUMBER LOCATIONS  
The mower serial number is affixed to RH side of the  
inside of the unit housing. Model and serial numbers  
are helpful when obtaining replacement parts and  
maintenance assistance. For ready reference,  
please record these numbers in the space provided.  
Information of special importance has been high-  
lighted in bold type in this manual. Refer to Safety  
Instructions for the meanings of DANGER, WARN-  
ING, CAUTION, IMPORTANT, and NOTE.  
Tractor Model No. _______________________  
Tractor Serial No. _______________________  
GLOSSARY  
There are many terms that are either unique to this  
equipment or that are used as acronyms. The fol-  
lowing terms and their definitions will help while us-  
ing this manual:  
Deck Serial No.  
_______________________  
Engine Model No. _______________________  
Engine Serial No. _______________________  
Date of Purchase _______________________  
DECK is the mowing attachment mounted on  
the front of the tractor which includes the carrier  
frame, deck housing, blade drive gearboxes,  
and cutter blades.  
Fill In By Purchaser  
FORWARD  
SPEED  
CONTROL  
(FSC)  
SWITCH controls the maximum forward speed  
of the tractor; functioning as a cruise control.  
GROUND DRIVE refers to the dual hydrostatic  
transmissions which drive the main wheels.  
Ref. RH  
Drive Wheel  
Ref. Engine  
Air Cleaner  
LEFT HAND (LH) refers to the left-hand side of  
the tractor when the operator is seated facing  
forward from the operator position.  
Serial  
Number Plate  
NEUTRAL LOCKOUT releases the hydrostatic  
transaxles to permit freewheeling the tractor.  
PISTOL GRIPS steer the tractor by controlling  
the dual hydrostatic transaxles.  
Tractor Serial Number Location  
(Top View of Tractor)  
POWER TAKE-OFF (PTO) transmits engine  
power to run the cutter blades.  
RIGHT HAND (RH) refers to the right-hand side  
of the tractor when the operator is facing for-  
ward from the operator position.  
1
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General Information  
SERVICING OF DRIVETRAIN GEARBOX  
The detailed servicing and repair of the engine, hy-  
drostatic transmission, and gearboxes are not cov-  
ered in this manual. Only routine maintenance and  
general service instructions are provided. For the  
service of these components during the limited war-  
ranty period, it is important to find a local, authorized  
servicing agent of the component manufacturer.  
Any unauthorized work done on these compo-  
nents during the warranty period may void the war-  
ranty.  
If you have any difficulty finding an  
authorized outlet or obtaining warranty service,  
please contact our Service Department for assis-  
tance:  
Serial Number  
Deck Serial Number Location  
Walker Manufacturing Company  
5925 E. Harmony Road  
Fort Collins, CO 80528  
1-970-221-5614  
ENGINE SERIAL NUMBER LOCATION  
The Kawasaki engine model, type, and code num-  
bers are located on the side of the engine opposite  
the recoil starter handle (on the aluminum housing).  
For the mower model covered by this manual, an en-  
gine manual is available to cover the Kawasaki  
FH430V.  
Service manuals are available for each of these  
components from their respective manufacturers as  
follows:  
Kawasaki Engines Kawasaki Tractor Corp.  
P.O. Box 888285  
Grand Rapids, MI 49588-8285  
Transmissions  
HydroGear Corporation  
Sullivan, IL  
Gearboxes  
(Deck & PTO)  
Tecumseh Products Co.  
900 North Street  
Grafton, Wl 53024  
Serial Number  
Engine Serial Number Location  
2
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Specifications  
MODEL  
MW  
ENGINE  
Manufacturer/Model  
Displacement  
Kawasaki, FH430V, OHV, 2 Cyl. V-Twin (Air-Cooled)  
431CC (26.3 cu. in.)  
15  
HP (@ 3600 RPM)  
Max. RPM (No Load)  
Governed RPM  
4000  
3600  
Max. Torque [ft-lb (Nm) @ RPM]  
Idle RPM  
23.6 (32 N•m) @ 2400  
1500  
Spark Plug Type  
Champion® RCJ8Y  
.030 in. (.75 mm)  
1.8 qts (1.7 liters)  
Spark Plug Gap  
Crankcase Capacity  
Crankcase Lubricant  
API SC/SD/SE/SF/SG/SH Grade Oil Only with 10W-30/10W-40  
Viscosity or 40W Above 68° F (20° C) Only  
Fuel Tank Capacity  
Fuel  
3 Gallons (11.4 liters)  
Automotive Grade Unleaded Gasoline (87 Octane)  
ELECTRICAL SYSTEM  
Battery  
12-Volt, Interstate PC1250  
12.5 Amp Alternator  
15 Amp DC (Regulated)  
Negative Ground  
Charging System  
Charging Output  
System Polarity  
Ignition  
Electronic Magneto  
Recoil Starter  
Starter  
Interlock Switch  
Ignition Lockout by Operator Presence Lever, Transmission Neutral  
and Blade Clutch  
TRANSMISSION  
Manufacturer/Model  
Steering  
Dual, Independent Hydro-Gear Integrated Transaxles  
Handle Pistol Grips  
Forward Speed Control  
Variable Speed Controlled by Rocker Switch Near RH Thumb, with  
Neutral Park Setting  
Service Brake  
Neutral  
Mechanical Lockout for each Transmission (Single Lever Control)  
Transmission Release by Manual Dump Valve  
3
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Specifications  
MODEL  
MW  
TRANSMISSION (continued)  
Transmission Fluid  
Factory Service  
20W50 Multi-Viscosity Motor Oil  
79 fl. oz. (2336 ml.)  
Transmission Fluid Capacity  
Transmission Cooling  
Ground Travel Speed  
Cooling Fan Mounted on Drive Pulley  
Forward m.p.h. (km/h)  
Reverse m.p.h. (km/h)  
0-5 (0-8) Infinitely Variable  
0-2 (0-3) Infinitely Variable  
BLADE DRIVE  
PTO Shaft  
Quick Disconnect Splined Shaft with Two (2) High-Speed U-Joints  
Blade Spindle  
Each Blade (2) Mounts Direct on Peerless Right Angle  
Gearbox with Tee Gearbox in Center Connected to PTO Shaft  
(Complete Geared Drive, Peerless Model 1000 Gearboxes)  
Blade Drive Clutch and Brake  
Manual Belt Tightener Clutch and Band Brake  
(Stops Blades within Five (5) Seconds of Disengagement)  
Max. Blade Speed  
[25 in. (64 cm) Blade] @ 3600  
RPM Engine  
2400 RPM  
[15700 FPM (4785 m/min)]  
(48" Deck)  
TIRE SIZE  
Deck Caster Wheel  
2.80/2.50-4 Pneumatic (4-Ply)  
8.25 x 2.75 Foamed Rubber  
18 x 8.50-10 (Low-Profile)  
2.80/2.50-4 Pneumatic (4-Ply)  
8.25 x 2.75 Foamed Rubber  
Deck Caster Wheel (Optional)  
Drive  
Rear  
Rear Wheel (Optional)  
TIRE PRESSURE  
Deck Caster Wheel  
20 PSI (137 kPa)  
15 PSI (103 kPa)  
Drive  
Rear  
20 PSI (137 kPa)  
DIMENSIONS (Tractor and Mower)  
80 in. (203 cm)  
Length  
48-3/4 in. (124 cm)  
Width  
Height  
44-3/4 in. (114 cm)  
22 in. (56 cm)  
Wheel Base (Tractor)  
Tread Width (Tractor)  
29-1/4 in. (74 cm)  
4
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Specifications  
MODEL  
MW  
MOWER DECK  
Width of Cut  
36-, 42-, 48-, 52-, or 56-in.(91, 107, 122, 132, or 142 cm)  
1 to 4 in. (3 to 10 cm)  
Cutting Height  
Height Adjustment  
7 Positions - 1/2 in. (1 cm) Increment Hitch Pins Installed in  
Multi-Position Deck Support  
Blade Size  
42 in. (107 cm)  
22 in. (56 cm) 2 in. (5 cm) Center Overlap  
(Two Blades, CW Rotation)  
48 in. (122 cm)  
48 in. (122 cm) 25 in. (64 cm) 2 in. (5 cm) Center Overlap  
(Two Blades, CW Rotation)  
Deck Suspension  
Torsion-Flex Frame with Caster Wheels and  
Counterweight Springs  
CURB WEIGHT (Approximate)  
Tractor Only  
370 lb (168 kg)  
520 lb (236 kg)  
Tractor and Deck  
* Dimensions and weight shown are for 48 in. (122 cm) SD Deck (Typical)  
DRIVE BELTS  
Engine PTO  
Walker P/N 9230  
Walker P/N 9248  
Ground Drive  
FRAME/BODY CONSTRUCTION  
Frame/Body  
Deck  
3/16 Plate Steel  
11 Gauge Steel  
NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time  
without notice or obligation.  
5
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Component Identification  
NOTE: Control Identification  
shown in Operating  
Instructions section.  
Throttle/Choke  
Control & Cable  
Engine  
Cover Latch  
Engine  
Cover  
Tilt-Up  
Latch  
Spring Clip  
Fuel Tank  
and Cap  
Counterweight Spring  
and Protective Cover  
Deck Support Pins  
and Height Adjustment  
Hitch Pins  
Parking  
Brake Handle  
Footrests  
Tilt-Up  
Handle  
Fuel Filter  
Tail Wheel  
Deck  
Caster Wheels  
Right Hand  
Drive Wheel  
Deck Support  
Arms  
Tilt-Up  
Hook  
Discharge Shield  
Deck Lift Handle  
(Cutting Height Adjustment)  
Front View and Right Side View  
6
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Component Identification  
Operator Presence Switch Control  
PTO Clutch  
Lever  
Tailpipe  
Muffler  
Pistol  
Grips  
Steering Control  
Rod (RH)  
Steering Control  
Rod (LH)  
Transaxle (LH)  
Transmission  
Neutral Lockout  
Rods  
Left Hand  
Drive Wheel  
Rear View and Left Side View  
7
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Component Identification  
Fuel Pickup  
Line  
FSC  
Electric  
Actuator  
Oil Dipstick/  
Oil Fill  
Recoil  
Starter Handle  
Oil Filter  
Fuel  
Pump  
Parking  
Brake  
Linkage  
Transaxle  
Pressure  
Relief  
Valve [(LH)  
Not Visible]  
Transaxle  
Pressure  
Relief  
Valve (RH)  
Counterweight  
Dampening Spring  
Battery  
Counterweight  
Dampening Spring  
Top View (Cover Removed)  
8
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Safety Instructions  
Pay particular attention to any information labeled  
DANGER, WARNING, CAUTION, IMPORTANT,  
and NOTE in this manual.  
Walker Manufacturing cannot predict every poten-  
tially 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.  
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 mower 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. Fail-  
ure to follow safety instructions contained in  
this manual may result in personal injury or  
damage to equipment or property.  
The seriousness or degree of importance of each  
type of information is defined as follows:  
DANGER  
An IMMEDIATE hazard that WILL result in  
severe personal injury or DEATH, if warn-  
ing is ignored and proper safety precau-  
tions are not taken.  
If you have any questions concerning setup, opera-  
tion, maintenance, or safety, please contact your  
authorized Walker Mower Dealer or call Walker  
Manufacturing Company at (970) 221-5614.  
BEFORE OPERATING  
1. Read and understand the contents of this  
Owner’s Manual before starting and operat-  
ing the machine. Become thoroughly familiar  
with all machine controls and how to stop the  
machine and disengage the controls quickly.  
Replacement Owner’s Manuals are available  
by sending the Model and Serial Number to:  
WARNING  
A POTENTIAL hazard that COULD result in  
severe personal injury or DEATH, if warn-  
ing is ignored and proper safety precau-  
tions are not taken.  
Walker Manufacturing Company  
5925 East Harmony Road  
Fort Collins, CO 80528  
CAUTION  
2. Never allow children to operate the ma-  
chine. Do not allow adults to operate without  
proper instruction.  
Possible hazards or unsafe practices that  
MAY result in MODERATE personal injury  
or property damage, or machine damage, if  
warning is ignored and proper safety pre-  
cautions are not taken.  
3. Themowershouldbeoperatedbyone(1)person  
at a time (do not give rides on the engine cover).  
4. Keep everyone, especially children and pets, a  
safe distance away from the area being mowed.  
Do not operate with bystanders in the area.  
IMPORTANT: Identifies mechanical information  
demanding special attention, since it deals with the  
possibilityof damagingapart orpartsof the machine.  
5. Do not operate the machine wearing sneakers,  
tennis shoes, or similar lightweight footwear.  
Wear substantial protective footwear that  
will improve footing on slippery surfaces.  
NOTE: Identifies information worthy of special  
attention.  
6. Ground cover or leaves can sometimes hide ob-  
jects that might cause damage to the mower or  
make unstable footing for the operator. Clear  
the area of objects and mark all sprinkler heads  
and/or utility box covers.  
9
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Safety Instructions  
7. Do not wear loose fitting clothing that could get  
caught in moving parts. Always wear ade-  
quate protective clothing including long  
pants. Wearing safety glasses and safety  
shoes is advisable and required by some local  
ordinances and insurance regulations.  
13. 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.  
OPERATING  
1. Operate the mower only in daylight or in  
good artificial light with good visibility of the area  
being mowed.  
8. Prolonged exposure to loud noise can cause  
impairment or loss of hearing. Operator hear-  
ing protection is recommended. Wear a suit-  
able hearing protective device, such as  
earmuffs or earplugs.  
2. Keep feet behind the tractor at all times and al-  
ways maintain secure footing when the tractor  
is moving and/or mower blades are operating.  
9. 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 ma-  
chine.  
3. Use extreme caution when reversing the ma-  
chine towards you.  
4. For a beginning operator, learn to steer (ma-  
neuver) the tractor with a slow engine speed  
before attempting any mowing operation.  
Be aware that, with the front mounted mower  
configuration, the back of the tractor can raise  
off the ground slightly when going into reverse  
at high speeds.  
10. Be sure interlock switches are functioning  
correctly so the engine cannot be started un-  
less the Forward Speed Control switch is in the  
NEUTRAL-PARK position and the PTO clutch  
is in the DISENGAGED position. Also, the en-  
gine should stop if the operator lifts their hands  
off the operator presence control with the PTO  
clutch in the ENGAGED position and/or moving  
forward (FSC switch out of neutral).  
5. Remember, for an emergency stop, the forward  
motion of the tractor can always be stopped by  
allowing the operator presence control (on top  
of handle bars) to raise up.  
11. Never attempt to make any adjustments  
while the engine is running, except where  
specifically instructed to do so.  
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 con-  
trols are in the OPERATING position).  
12. Handle gasoline with care. Gasoline is highly  
flammable and its vapors are explosive:  
a. Use an approved fuel container.  
7. Do not run the engine in a confined area  
without adequate ventilation. Exhaust fumes  
are hazardous and can be deadly.  
b. Never add fuel to a running engine or hot  
engine (allow hot engine to cool several  
minutes).  
8. 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.  
c. Keep matches, cigarettes, cigars, pipes,  
open flames, or sparks away from the fuel  
tank and fuel container.  
d. Always fill the fuel tank outdoors using  
care. Fill to about one inch from the top of  
the tank. Use a funnel or spout to prevent  
spilling.  
9. Avoid sudden starts or stops. Before backing  
the machine up, look to the rear to be sure the  
area behind you is clear of obstacles. Watch  
carefully for traffic when crossing or working  
near roadways.  
e. Replace the machine fuelcapandcontainer  
cap securely and clean up any spilled fuel  
before starting the engine.  
10  
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Safety Instructions  
10. Disengage the blade drive when transporting  
the machine across drives, sidewalks, etc.  
Never raise the mower deck while blades are  
rotating.  
the mower and repair any damage before re-  
starting the engine and operating the mower.  
Make sure cutter blades are in good condition  
and blade nuts are torqued to 60 ft-lb (81.3  
Nm).  
11. The maximum recommended side slope op-  
erating angle is 20 degrees or 33% grade.  
When operating the machine on a slope, reduce  
ground speed and use caution to start, stop,  
and maneuver. To prevent tipping or loss of  
control of the machine, avoid sharp turns or  
sudden changes in direction.  
17. Do not touch the engine, engine cover, or  
muffler while the engine is running or imme-  
diately after stopping the engine. These areas  
may be hot enough to cause serious burns.  
18. When leaving the machine unattended, dis-  
engage the blade clutch (PTO), stop the en-  
gine, and remove the key.  
12. Never adjust cutting height with the engine  
running. Before adjusting cutting height or  
servicing, disengage the blade clutch (PTO),  
stop the engine, and remove the ignition key.  
Wait for all movement to stop before leaving the  
operator position.  
MAINTENANCE  
1. To prevent accidental starting of the engine  
when servicing or adjusting the machine, re-  
move the key from the ignition switch and dis-  
connect the spark plug wires.  
NOTE: A blade brake should normally stop  
drive line rotation within five (5) seconds of dis-  
engaging the PTO clutch.  
2. To reduce fire hazards, keep the engine free of  
grass, leaves, excessive grease, and dirt.  
13. For side discharge mower decks, do not oper-  
ate with the grass deflector chute removed.  
Keep the deflector in the lowest possible posi-  
tion.  
3. Keep all nuts, bolts, and screws tight to ensure  
the machine is in a safe, working condition.  
Check the blade mounting nuts frequently, mak-  
ing sure they are tight.  
14. For tractors equipped with tilt-up deck, do not  
4. Perform only maintenance instructions de-  
scribed in this manual. Unauthorized main-  
tenance operations or machine modifications  
may result in unsafe operating conditions.  
move tractor with deck in tilt-up position.  
15. In case of a clogged or plugged mower  
deck:  
5. If the engine must be running to perform a main-  
tenance adjustment, keep hands, feet, and  
clothing away from moving parts. Do not wear  
jewelry or loose clothing.  
a. Disengage the blade clutch (PTO) and  
turn the engine off before leaving the  
operator position (behind the handles).  
b. LOOK to make sure blade drive shaft  
movement has stopped before trying to  
unclog the deck.  
6. Always use the proper engine service man-  
ual when working on the engine. Unautho-  
rized maintenance operations or modifications  
to the engine may result in unsafe operating  
conditions.  
c. Disconnect the spark plug wires.  
d. Never place hands under the deck - use a  
stick or similar tool to remove clogged  
material.  
7. Altering the equipment or engine in any manner  
which adversely affects its operation, perfor-  
mance, durability, or use will VOID the warran-  
ty and may cause hazardous conditions.  
16. If the cutting blades strike a solid object or the  
machine begins to vibrate abnormally, immedi-  
ately disengage the blade clutch (PTO), stop  
the engine, and wait for all moving parts to  
stop. To prevent accidental starting, discon-  
nect the spark plug wires. Thoroughly inspect  
8. Never attempt to disconnect any safety devices  
or defeat the purpose of these safety devices.  
11  
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Safety Instructions  
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 malfunc-  
tion and possible injury to the operator and/or  
others.  
11. Use care when charging the battery or per-  
forming maintenance on the battery and electri-  
cal 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.  
c. Keep sparks, flames, 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 mak-  
ing repairs on the electrical system.  
IMPORTANT: Keep all applicable manuals  
immediately accessible to anyone who may  
operate or service this machine.  
12  
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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 List.  
Control Panel (Walker P/N 9801)  
On Body Adjacent  
to Parking Brake Lever  
(P/N 9802)  
On Body Adjacent  
to Clutch Control Lever  
(P/N 9803)  
On Rear of Body Above  
Neutral Lockout Arms (2)  
(P/N 9804)  
13  
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Assembly Instructions  
SETUP INSTRUCTIONS  
Battery Charging  
Walker Mowers are shipped partially assembled.  
After uncrating the tractor and mower deck, initial  
setup is required.  
DANGER  
BATTERIES PRODUCE EXPLOSIVE GASES  
NOTE: During the process of unpacking, any dam-  
aged or missing parts should be noted and reported  
to the delivering carrier immediately (put in writing  
within 15 days). The carrier will provide directions  
for proceeding with a claim to receive compensation  
for damage.  
Charge the battery in a well-ventilated  
area, so that gases produced while charg-  
ing can dissipate.  
Keep sparks, flames, and smoking mate-  
rials away from the battery at all times.  
Tire Installation (Tractor)  
Make sure the battery charger is unplug-  
ged before connecting or disconnecting  
cables to the battery.  
Install the drive tires using the eight (8) lug bolts  
that are supplied with the owner’s packet of materi-  
als. Drive tires are 18 x 8.50-10, 4-ply; rear tire is  
2.80/2.50-4 Pneumatic (4-Ply).  
Limit initial charging current to 1000mA. Charge un-  
til battery voltage (under charge) reaches 14.40 to  
14.70 volts at 68°F (20°C). Hold at 14.40 to 14.70  
volts until current drops to approximately 50mA.  
Battery is fully charged under these conditions, and  
charger should be disconnected.  
Check and adjust the inflation of the tires. The  
tire inflation recommendations are:  
Drive = 15 PSI (103 kPa)  
Rear = 20 PSI (137 kPa)  
NOTE: Due to the self-discharge characteristics of  
this type of battery, it is imperative that it be charged  
after 6-9 months of storage, otherwise permanent  
loss of capacity might occur as a result of sulfation.  
Battery Service  
The battery is a completely sealed, non-serviceable  
battery.  
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.  
Front of Mower  
Ref. Engine  
Battery Location  
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Assembly Instructions  
Mower Deck Assembly  
Deck Discharge Shield Installation  
(Side Discharge Models Only)  
Deck Caster Wheels Installation  
Attach the deck side discharge shield by positioning  
the shield hinge lug in front of the deck mount and  
fastening with two 3/8-16 x 1-1/4 in. bolts, 3/8-16  
ESNA nuts, and 3/8 in. wave spring washers. The  
wave washers fit between the two hinging surfaces.  
Tighten the nuts until the shield moves freely but is  
not loose.  
1. Remove the bolt, nut, axle spacer tube, and  
spacer washers from each deck caster wheel  
fork.  
NOTE: Spacer washers are used only when  
the optional semi-pneumatic deck wheels (8.25  
x 2.75) are installed.  
WARNING  
2. Fit the axle spacer tube through the wheel hub,  
position the spacer washer on each side of the  
hub (if used), and fit the assembly into the wheel  
fork.  
DO NOT operate the machine without the  
grass deflector chute attached and in the  
lowest possible position.  
3. Insert the 3/8-16 x 4-1/2 in. bolt through the  
wheel fork with the bolt head to the outside and  
install the 3/8-16 in. Keps nut.  
4. Tighten the bolt and nut until the axle spacer  
tube bottoms against the inside of the wheel  
fork (will not turn) while the wheel and spacer  
washers (if used) spin freely without binding.  
Attach Shield  
Deck Discharge Shield Installation  
Deck Caster Wheel Installation  
15  
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Assembly Instructions  
PTO Shaft Guard Installation  
Mower Deck Installation on Tractor  
Position the shaft guard as shown and mount with  
two 1/4-20 x 1/2 in. bolts.  
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.  
Attach Guard  
2. Engage the deck carrier frame tube sockets on  
the tractor support arms. Slide the deck onto  
the support arms.  
NOTE: When installing the DSD52 Mower  
deck, make sure to retract the dolly wheel after  
mounting the deck on the tractor.  
3. Install the hitch pin through the hole on the end  
of each support arm to lock the deck in place  
(refer to Counterweight Spring Receptacle  
Assembly photos). Two (2) hitch pins are  
included in the owner’s packet of materials.  
PTO Shaft Guard Installation  
Tilt-Up Roller Wheel Installation  
NOTE: A 2-1/2" diameter tilt-up roller wheel  
(P/N 9772) is required for decks installed on the  
walk-behind.  
4. Connect the mower deck PTO drive shaft  
assembly to the tractor with the splined quick  
disconnect coupler. This coupler simplifies  
shaft alignment and installation.  
Mount the two (2) tilt-up roller wheels on the brack-  
ets 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.  
a. Use the arrows on the shaft and tube to  
align and slide the PTO quick coupler onto  
the deck splined shaft.  
Roller Wheels  
b. Reaching under the tractor, pull the ring  
back on the coupler, slide onto the spline  
shaft on the tractor, and release the ring.  
IMPORTANT: To prevent damage to the  
mower, make sure the PTO shaft assembly is  
securely locked on the tractor, with the locking  
balls fully seated in the groove and the ring in the  
full forward position (refer to the Coupler Ring  
“Locked” Position photo). After installation,  
pull on the shaft to check for security.  
Tilt-Up Roller Wheel Installation  
16  
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Assembly Instructions  
5. Pull out counterweight spring receptacle assist  
handle and lift up on locking finger slightly to  
unlock the receptacle assembly. Lower this  
assembly toward the deck and attach the coun-  
terweight springs to the receptacle. Raise the  
assist handle until the assembly locks into the  
raised position to tension the springs  
Grease Deck  
Support Arms  
1) Install Counterweight  
2) Retain Spring Clip  
Spring Clip  
Using Tab  
into Receptacle  
PTO  
Shaft  
Mower Deck Installation  
(PTO Shaft Connection)  
3) Use Lever to Assist  
Raising Assembly to  
"Locked" Position  
Pull Back Spring-Loaded  
Coupler Ring  
Counterweight Spring Receptacle Assembly in  
"Unlocked" Position  
Locking Finger "Snaps"  
to Hold Assembly in  
"Locked" Position  
Lift Up on Locking  
Finger to Lower  
Assembly  
Installing PTO Quick Coupler  
Spring-Loaded Coupler Ring  
In Fully Forward Position  
Counterweight Spring Receptacle Assembly in  
"Locked" Position  
6. With the counterweight springs connected, the  
weight on the deck caster wheels should be  
15 to 25 Ib (7 to 11 kg). Check this weight by lift-  
ing on the front of the deck carrier frame. If  
required, the spring tension can be adjusted by  
tightening or loosening the elastic stop nuts  
located underneath the lower spring hook.  
Coupler Ring “Locked” Position  
17  
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Assembly Instructions  
2. Check the side-to-side level. Rotate each  
blade sideways and measure the distance  
from blade tip to ground on each side. If mea-  
surements vary more than 1/8 in. (3 mm), add a  
washer shim under the deck support pins on the  
low side to level the deck.  
3. Check the front-to-rear level. Rotate the blades  
to point forward. Measure the distance from  
blade tip to ground on the front and rear. The  
rear of the blade should be 1/8 to 1/4 in. (3 to 6  
mm) higher than the front of the blade; shim the  
rear (or front) deck support pins equally to  
achieve at least 1/8 in. (3 mm) difference.  
Deck Leveling  
1. Position mower on a smooth, level surface. Set  
the cutting height to the highest position - 4 in.  
(102 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 4 in. (102 mm) high  
is a convenient gauge to measure blade height  
above ground during the leveling process.  
WARNING  
NOTE: The mower deck and support frame are  
jig welded; within normal tolerances, very little, if  
any, shimming should be required to level the  
deck. Tire pressure will influence the levelness  
of the deck. Check the tire pressure as a possi-  
ble cause of the deck not being level.  
The machine must be shut off during this  
procedure.  
4 in. (102 mm)  
Wood Block  
Should be 1/8 in. (3 mm)  
to 1/4 in. (6 mm) higher  
at the rear of the blade  
Should not vary more  
than 1/8 in. (3 mm)  
side-to-side  
4 in. (102 mm)  
Wood Block  
Deck Leveling  
18  
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Assembly Instructions  
PREOPERATING CHECKLIST  
IMPORTANT: DO NOT mix oil with gasoline. Al-  
ways use fresh, automotive grade gasoline. DO  
NOT use premium, white, or high-test gasoline. DO  
NOT use additives, such as carburetor cleaners, de-  
icers, or moisture removing agents. DO NOT use  
gasoline blended with methyl alcohol.  
Before operating the mower for the first 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 ev-  
ery day, but the operator should be aware of the con-  
dition of each.)  
CHECK ENGINE CRANKCASE OIL LEVEL  
Check the engine crankcase oil level before use and  
after each 5 hours of continuous operation. Refer  
to LUBRICATION for Checking Engine Crankcase  
Oil Level in Maintenance Instructions.  
For proper fuels and lubricants refer to Specifica-  
tions.  
FILL FUEL TANK  
CHECK AND SERVICE ENGINE AIR CLEAN-  
ER SYSTEM  
Fill the fuel tank using clean, fresh automotive grade  
unleaded gasoline (87 octane rating minimum).  
Check condition, cleanliness, and security of  
the air cleaner system (clean air filter every  
100 hours). For detailed procedures, refer to  
CLEANING the Engine Air Cleaner System in  
Maintenance Instructions.  
DANGER  
Handle gasoline with care. Gasoline is  
highly flammable and its vapors are ex-  
plosive. Use safe refueling procedures:  
ADJUST CARBURETOR (Initial Start-up Only)  
DO NOT fill fuel tank with the engine run-  
Refer to ADJUSTMENTS of Carburetor in Mainte-  
nance Instructions.  
ning.  
If the engine is hot, allow to cool before  
CHECK ENGINE COOLING SYSTEM  
refueling.  
Check condition and cleanliness of engine air intake  
screen located on top of engine. For detailed proce-  
dures, refer to CLEANING the Engine Cooling  
System in Maintenance Instructions.  
Use an approved fuel container.  
Fuel the mower outdoors.  
DO NOT smoke while refueling.  
Avoid spilling fuel; use a funnel or spout.  
DO NOT overfill the fuel tank; fill up to  
about 1 in. (25 mm) below the top of tank.  
IMPORTANT: DO NOT permit dirt or other foreign  
matter to enter the fuel tank. Wipe dirt from around  
the filler cap before removing. Use a clean fuel stor-  
age container and funnel.  
19  
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Assembly Instructions  
INSPECT TWO (2) DRIVE BELTS  
PTO Drive and Hydrostatic Ground Drive.  
CHECK TIRE PRESSURE  
DANGER  
With the deck in the tilt-up position, the U-  
joint tube and shaft may separate. Check  
after lowering deck and before operating.  
Deck Caster Wheel = 20 PSI (137 kPa)  
Drive  
Rear  
=
=
15 PSI (103 kPa)  
20 PSI (137 kPa)  
DANGER  
CHECK AND CLEAN GRASS BUILDUP  
UNDERNEATH MOWER DECK  
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 unlocking the deck lock levers on each side of the  
carrier frame and inserting the deck hook into the tilt-  
up latch on the tractor body. Before operating the  
tractor, make sure to re-engage the deck lock levers  
after lowering the deck to the normal operating po-  
sition.  
CAUTION  
Do not operate machine with deck tilt-up  
pivot joint unlocked.  
CHECK MOWER BLADE CONDITION, SHARP-  
NESS, AND SECURITY OF MOUNTING  
The blade mounting nut should be tightened to  
60 ft-lb (81.3 Nm). If blade sharpening is required,  
refer to CHECKING/SERVICING for Sharpen  
Mower Blades in Maintenance Instructions.  
ADJUST MOWER CUTTING HEIGHT, IF RE-  
QUIRED  
Deck Secured in TILT-UP Position  
Position the hitch pins in the four deck support pins.  
Refer to the “Cutting Height Adjustment” decal on  
the deck gearbox cover.  
DANGER  
PERFORM ANY ADDITIONAL PROCEDURES  
called for on the MAINTENANCE SCHEDULE  
CHART in Maintenance Instructions.  
Do not operate the mower with deck in tilt-  
up position. Do not move the tractor with  
the deck in the tilt-up position.  
20  
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Operating Instructions  
CONTROL IDENTIFICATION, LOCATION, AND  
FUNCTION  
Engine Throttle/Choke  
The throttle/choke control lever (red knob) is located  
to the left hand side of the operator’s control panel.  
This control is a dual-functioning control (choke and  
throttle). The control is equipped with a detent be-  
tween the choke position (full forward) and the throt-  
tle control range.  
Operating Controls  
CAUTION  
Before operating the mower, become fa-  
miliar with the location and function of  
all operator controls. Knowing the loca-  
tion, function, and operation of these  
controls is important for safe and effi-  
cient operation of the mower.  
To start a cold engine, push the control to the  
CHOKE position. After the engine starts, pull the  
control back past the detent into the THROTTLE  
CONTROL range. A warm engine requires little or  
no choke for starting.  
Moving the lever forward into the FAST position in-  
creases engine speed; moving it backward toward  
the IDLE position decreases engine speed.  
Blade Clutch  
(PTO)  
Engine Throttle/  
Choke Positions  
Parking Brake  
Lever  
Engine Throttle/  
Choke Lever  
Operating Controls Not Located on Control Panel (Top View)  
10 Amp  
Circuit Breaker  
Operator Presence  
Ignition Switch  
Operator Presence  
Control  
Control  
Pistol Grip/  
Steering  
Pistol Grip/  
Steering  
Control (RH)  
(Not Visible)  
Control (LH)  
(Not Visible)  
Hourmeter  
Forward Speed  
Control Positions  
Forward Speed  
Control Switch  
Operating Control on Control Panel (Top View)  
Operating Controls  
21  
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Operating Instructions  
IMPORTANT: Make sure the choke is in the OFF  
position during normal engine operation; running  
with the choke in the ON position CAN damage the  
engine.  
Parking Brake  
The parking brake functions by locking a detent arm  
into the transaxle outer control gear teeth. Moving  
the lever FORWARD engages the parking brake;  
moving the lever BACKWARD releases the brake.  
Forward Speed Control (FSC)  
IMPORTANT: Stop the tractor completely before  
engaging the parking brake. The parking brake  
uses a positive mechanical lock similar to the PARK  
position 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.  
The Forward Speed Control (FSC) is a rocker switch  
located adjacent to the RH thumb position near the  
RH pistol grip.  
This rocker switch controls an electric actuator that  
has two functions: One is to set forward travel  
speed, and the other is to establish the NEUTRAL-  
PARK position. When the FSC switch is moved into  
the FORWARD position, it sets the forward speed  
from 0 to 5 mph (0 to 8 km/h). The ground speed is  
proportional to how long the rocker switch is held for-  
ward; the longer the switch is held forward, the faster  
the tractor moves. It is not necessary to hold the  
FSC switch in position since the electric actuator  
maintains the selected position. Squeezing the pis-  
tol grips/steering control levers overrides the FSC  
setting and slows or stops forward travel. Releasing  
the pistol grips/steering control levers allows the  
tractor to resume forward travel at the speed set by  
the FSC switch. To stop and park the machine, the  
FSC switch is depressed backward until the NEU-  
TRAL-PARK position is achieved.  
NOTE: If pressure on the parking brake lever is no-  
ticed when engaging the brake, move the mower  
gently forward or backward to allow the brake detent  
to set into the teeth.  
Engine Cover Latch  
The engine cover hinges forward for maintenance  
access and is latched down in the OPERATING po-  
sition. To raise the body, unhook the rubber latch lo-  
cated between the fuel tank and engine.  
Transaxle Lockout Rods  
The transaxle lockout rods disengage the transax-  
les. By pulling the rods toward the rear of the mow-  
er and locking them into place with the shoulder on  
the rod in the body, the transaxles are released to  
permit freewheeling. By releasing the rods and  
pushing it back into the body, the transaxles are en-  
gaged 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 LOCKOUT in this  
section for operating instructions.  
Pistol Grips/Steering Control Levers  
Each drive wheel is controlled by its own indepen-  
dent pistol grip (located below the operators han-  
dles), for both steering function and FORWARD/  
REVERSE motion. The FSC switch sets the maxi-  
mum forward speed, and also sets the forward posi-  
tion of the pistol grips. The pistol grips operate only  
with a squeezing movement of the grip, which  
causes the drive wheel for that lever to first slow  
down, stop, and then reverse with a full backward le-  
ver stroke. The grips are released to the FOR-  
WARD position for “straight-ahead” ground travel.  
Reverse is achieved by squeezing the pistol grips  
past the NEUTRAL-PARK position. For better con-  
trol, it is recommended that this is done in conjunc-  
tion with toggling the FSC switch back to the  
NEUTRAL-PARK position.  
NOTE: The transaxle lockout rods ends should be  
completely retracted against the body, otherwise op-  
eration of the transaxle may be erratic.  
Hourmeter  
The hourmeter displays operating time accumulat-  
ed while the ignition switch is in the ON position with  
the engine running. It also gives service indications  
for oil changes and lubrication.  
Blade Clutch (PTO)  
Circuit Breaker  
The blade clutch lever has two positions. Pulling the  
lever BACK engages the PTO that drives the mow-  
er blades. Pushing the lever FORWARD disengag-  
es the PTO and engages the blade brake.  
A manual reset circuit breaker is located on the op-  
erator panel. It has a button that pops out if the cir-  
cuit breaker trips. The circuit breaker protects the  
safety switches.  
22  
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Operating Instructions  
Ignition Switch  
CAUTION  
The ignition switch has two positions: a RUN and an  
OFF position. The RUN position should be used  
when starting (using the recoil starter) and running  
the engine. The OFF position stops the engine.  
A safety interlock switch system PRE-  
VENTS CRANKING the engine with either  
the Forward Speed Control or the blade  
clutch (PTO) out of neutral. If the engine  
cranks otherwise, the safety system is not  
working and should be repaired or ad-  
justed before operating the mower. DO  
NOT disconnect safety switches; they are  
for the operator’s protection.  
OFF  
ON  
2. Turn the ignition key to the RUN position. Move  
thethrottle/chokeleverintotheCHOKEposition.  
NOTE: The choke may not be required if the  
engine is warm.  
3. Make sure you have secure footing and pull  
the recoil starter handle toward you.  
IMPORTANT: If the engine fails to start after  
approximately 5 attempts, the engine and safety  
switch circuit should be checked before any fur-  
ther attempts. Turn the key to the OFF posi-  
tion to begin these checks.  
Ignition Switch  
STARTING THE ENGINE  
4. After the engine starts, gradually move the  
throttle/choke lever to the THROTTLE position,  
keeping enough choke on to allow the engine  
to run smoothly as it warms up. As soon as  
possible, move the lever past the detent into  
the THROTTLE position.  
CAUTION  
Before operating the mower, read and un-  
derstand all Safety Instructions and Operat-  
ing Instructions.  
IMPORTANT: Make sure the choke is in the  
OFF position during normal engine operation;  
running with the choke in the ON position CAN  
damage the engine.  
WARNING  
ADJUSTING GROUND SPEED AND STEERING  
NEVER run the engine in an enclosed or  
poorly ventilated area. Engine exhaust  
contains carbon monoxide, an odorless  
and deadly gas.  
IMPORTANT: If the DSD52 Mower deck is  
installed on the tractor, make sure the dolly  
wheel is retracted BEFORE moving.  
CAUTION  
1. Before attempting to start the engine, make  
sure the Forward Speed Control (FSC) rocker  
switch is in NEUTRAL-PARK position, and the  
blade clutch and parking brake are  
DISENGAGED.  
Learn to START, STOP, and MANEUVER  
the mower in a large, open area.  
If the operator has not operated a machine  
with DUAL TRANSAXLES or PISTOL  
GRIPS, steering and ground operation  
should be learned and practiced until the  
operator is completely comfortable han-  
dling the machine BEFORE ATTEMPTING  
TO MOW.  
23  
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Operating Instructions  
1. Place both hands on their respective grips and  
using your RH thumb, toggle the FSC switch out  
of NEUTRAL- PARK position to the desired for-  
ward speed. It is not necessary to hold the FSC  
switch in position since the electric actuator  
holds the selected switch position (and forward  
travel speed).  
Beginning Recommendations are:  
Learn operation of the mower in an open  
area away from buildings, fences, and ob-  
structions. Learn operation on flat ground  
BEFORE operating on slopes.  
Start maneuvering the mower with  
SLOW engine speed and SLOW Forward  
Speed Control setting until familiar with all  
operating characteristics.  
2. Steer by squeezing the pistol grip on the side of  
desired direction of turn, e.g., squeeze the LH  
grip to turn left.  
3. Reverse direction of the mower by squeezing  
both grips.  
Remember the forward speed of the  
mower is controlled by the FSC toggle  
switch (a unique Walker feature); always  
squeeze the pistol grips for steering or for  
reverse motion of the mower.  
NOTE: Smooth action on the pistol grips will  
produce smooth mower operation. Remember  
to keep the engine and ground speed slow until  
learning the control response.  
Learn to operate the pistol grips with  
smooth action. Jerky movements are hard  
on the transaxles and lawn. For sharp  
turns, do not allow the inside wheel to stop  
and twist on the grass. Squeeze the pistol  
grip controlling the inside wheel into re-  
verse for a smooth “rolling” turn (one wheel  
rolling forward while the other rolls back-  
ward).  
4. The FSC switch 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 cut-  
ter blades, i.e., as the engine pulls down in  
heavy cutting, toggle back the FSC switch to re-  
duce ground speed. Adjusting ground speed  
helps maintain a balance between engine power  
and blade speed for high-quality cutting action.  
Practice maneuvering the mower until  
you can make it go exactly where you are  
aiming.  
5. Stop ground travel by squeezing both pistol  
grips to the NEUTRAL position (tractor not  
moving) and depressing the FSC switch back to  
the NEUTRAL-PARK position.  
Remember, for an emergency stop, or in  
case of loss of control, the machine is  
equipped with an operator presence switch  
on the handlebars. Releasing this when the  
machine is driving or the PTO is engaged  
will make the engine shut down.  
NOTE: If the tractor creeps forward or back-  
ward with the FSC switch in the NEUTRAL-  
PARK position, the transmission control needs  
to be adjusted. Refer to ADJUSTMENTS of  
Transmission Control in Maintenance In-  
structions.  
Operator Presence  
Controls Depressed  
RH Thumb Control  
FSC Switch  
Correct Operator Hand Position  
24  
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Operating Instructions  
ENGAGING THE MOWER  
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. Pull the blade clutch lever SLOWLY up to en-  
gage the mower blades.  
CAUTION  
A safety interlock switch (operator pres-  
ence on handle grips) will cause the en-  
gine to stop if the blade clutch is engaged  
and the operator presence control is not  
depressed. The function of this switch  
should be checked by the operator lifting  
off of the control and engaging the blade  
Blade Clutch Engaged  
clutch; the engine should stop.  
If the  
switch is not working, it should be re-  
paired or replaced before operating the  
mower. DO NOT disconnect the safety  
switches; they are for the operator’s pro-  
tection.  
IMPORTANT: DO NOT engage the blade clutch  
when transporting the mower across drives, side-  
walks, loose materials, etc. DO NOT engage the  
blade clutch with the PTO shaft disconnected  
(the mower deck removed from tractor).  
Blade Clutch Disengaged  
CAUTION  
STOPPING THE MACHINE  
If the cutting blades strike a stationary ob-  
ject while mowing, stop the mower imme-  
diately, disconnect the spark plug wires,  
lift the deck, and inspect the deck and  
blades thoroughly for damage. Make sure  
that the blade timing has not been dis-  
turbed (the blades should be at 90 degrees  
to each other on gear-driven decks). Refer  
to REPLACING/REPAIRING the Blade  
Overload Shear Bolts in Maintenance In-  
structions if blades are out of time. Also,  
make sure the blade retaining nuts are  
torqued to 60 ft-lb (81.3 Nm).  
1. Slow the engine to a fast idle; put the throttle in  
the 1/2 throttle position.  
2. Squeeze the pistol grips to the NEUTRAL posi-  
tion and toggle the FSC switch back to the  
NEUTRAL-PARK position.  
3. Disengage the blade clutch.  
IMPORTANT: DO NOT disengage the blade  
clutch with high engine speed (above 1/2 throt-  
tle) since the brake action on the blade drive will  
cause premature wear of the brake band.  
25  
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Operating Instructions  
Cutting height is adjusted by positioning the four re-  
tainer hitch pins in a series of seven vertical holes on  
the deck support pins. Lift handles have been pro-  
vided on each end of the deck to assist in raising the  
deck while positioning the hitch pins. Cutting heights  
range from 1 in. (25 mm) [top holes] to 4 in. (102 mm)  
[bottom holes] in 1/2 in. (13 mm) increments.  
CAUTION  
A brake stops the cutter blades from free-  
wheeling within five (5) seconds after dis-  
engaging the clutch. If the brake system  
malfunctions and the blades do not stop  
within five (5) seconds, the brake should  
be adjusted or repaired before operating  
the mower. Refer to ADJUSTMENTS of  
Blade Clutch (PTO) in Maintenance Instruc-  
tions.  
Lift Handle  
Deck Support  
Pin  
4. Slow the engine to idle, put throttle in IDLE po-  
sition; and turn the ignition switch OFF.  
WARNING  
Hitch Pin  
Remove the key from the ignition switch  
when leaving the mower unattended. This  
will prevent children and inexperienced  
operators from starting the engine.  
Cutting Height Adjustment  
TRANSAXLE LOCKOUTS  
5. Engage the parking brake.  
IMPORTANT: DO NOT TOW this mower with the  
transaxlelockoutsengaged. Towingcanproduceex-  
cessive internal pressure and damage the transaxle.  
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, especially when transmission fluid is  
warm.  
To move the mower with the engine NOT running  
(will not start, maintenance, etc.), unlock (release)  
the transaxles.  
1. Locate each lockout rod at the rear of the mow-  
er on either side of the tail wheel below the fuel  
tank.  
ADJUSTING CUTTING HEIGHT  
2. Pull each rod out and lock them on the body us-  
ing the shouldered part of the rod.  
WARNING  
3. The mower will “freewheel” with the rods in the  
LOCKOUT position. The rods must be shoul-  
dered on the body to completely unlock the  
transmissions.  
The engine must be stopped before ad-  
justing cutting height. Disengage the  
blade clutch (PTO), stop the engine, and  
remove the ignition key. Wait for all move-  
ment to stop before leaving the operator  
position.  
4. After moving the mower, release the rods, plac-  
ing them in the normal OPERATING position.  
The transmission rod ends should be complete-  
ly retracted against the body, otherwise opera-  
tion of the transmission may be erratic.  
26  
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Operating Instructions  
When mowing in adverse conditions (tall and/or  
wet grass), mow the grass twice. Raise the mower  
to the highest setting - 4 in. (102 mm) - for the first  
pass and then make a second pass cutting to the  
desired height.  
Use a slow setting on the FSC for trimming  
operations.  
Make sure the mower is leveled properly for a  
smooth cut. Refer to Deck Leveling in Assembly  
Instructions.  
Neutral Lockout  
Rod (LH)  
Freewheel Position  
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 move-  
ments of the pistol grips since the hydrostatic  
transmissions are “power boosted controls” and  
jerking the levers can easily slip the tires. For sharp  
turns, do not allow the inside wheel to stop and twist  
on grass; squeeze the inside pistol grip into reverse  
for a smooth “rolling” turn (one wheel rolling forward  
while the other rolls backward).  
Neutral Lockout  
Rod (LH)  
Operating Position  
When using a side discharge mower deck, the  
side discharge shield must not be removed and  
must be kept in the lowest possible position to  
deflect grass clippings and thrown objects 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.  
RECOMMENDATIONS FOR MOWING  
IMPORTANT: Operate the engine at full speed  
when mowing, to allow the engine to produce full  
horsepower and to increase efficiency of the engine  
cooling system.  
Keep the mower deck and discharge chute clean.  
Mow with 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.)  
Discharge  
Shield  
When mowing, operate the engine at or near full  
throttle for the best cutting action and performance  
of the deck. 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.  
Side Discharge Shield in Lowest Position  
27  
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Operating Instructions  
Maintenance Instructions  
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 side slope operating  
angle is 20 degrees or 33% grade.  
IMPORTANT TIPS FOR CARE OF THE  
KAWASAKI ENGINE  
Fuel System  
Fuel must be clean - free from water, dirt, and  
organic material.  
Change fuel filter on a regular basis and when  
contamination is suspected or found in the fuel.  
Starting/Stopping  
Match crankcase oil viscosity to the ambient tem-  
perature, allowing the engine to crank faster and  
start easier.  
Cooling System  
Operate the engine at full speed when mowing.  
This will allow the engine to produce full horsepower  
and move more cooling air through the cooling fins.  
Air Cleaner System  
Use only Kawasaki air cleaner elements. After-  
market elements may not seal in the air cleaner  
housing, allowing dirt to enter the engine. Also,  
aftermarket filters often skimp on the filtration media  
and require more frequent cleaning and replace-  
ment (see following instructions).  
22 in.  
20°  
60 in.  
DO NOT overservice or frequently “disturb” the  
air filter. A dirty air filter actually cleans better than  
a new one. Changing and cleaning the air filter too  
often can actually reduce filter efficiency and  
increase the opportunity for traces of dust to enter  
the engine.  
Maximum Recommended Side Slope  
RECOMMENDATIONS FOR TILT-UP DECK  
OPERATION/TRANSPORT  
When the air filter element is removed or  
replaced, make sure all dust is cleaned out of the  
air cleaner housing. Use a damp cloth and wipe  
the interior of the air cleaner case clean (a little dirt  
left here will be sucked into the engine and reduce  
engine life). When the filter is installed, make sure  
the element is held tight and straight in the hous-  
ing for proper seating and sealing.  
To avoid potential deck and/or tractor damage while  
using the tilt-up deck, the following recommenda-  
tions 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 configuration should only be used when  
the tractor is parked.  
Oil  
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).  
DO NOT screw filler cap into crankcase when  
checking oil level.  
Single viscosity or multi-viscosity oils may be  
used with the viscosity matching ambient tempera-  
tures for the engine operating conditions. This will  
aid starting in cold weather and assure proper lubri-  
cation in hot weather.  
Use only Kawasaki oil filters. Aftermarket filters  
may not seal properly and/or have the incorrect  
pressure relief valve for proper lubrication.  
28  
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Maintenance Instructions  
CAUTION  
Maintenance procedures requiring special training or  
tools should be performed by a trained technician.  
MAINTENANCE SCHEDULE CHART - RECOMMENDED SERVICE INTERVALS - MODEL MW  
25  
Hours  
50  
Hours  
100  
Hours  
200  
Hours  
Ref.  
Page  
Service Item  
Daily  
Check Engine Crankcase Oil Level  
Check/Clean Engine Air Intake Screen*  
Check for Loose or Lost Nuts and Screws  
Clean Grass Buildup Under Deck  
Service Mower Blades  
x
x
x
x
x
30  
36  
N/A  
36  
37  
31  
37  
38  
38  
36  
36  
30  
38  
36  
30  
38  
39  
36  
Lubricate Grease Fittings and Oil Points*  
Check Tire Pressure  
x
x
x
x
x
Check Drive Belts (PTO, Ground Drive)  
Check PTO and Deck Gearbox Oil Seals  
Clean Air Filter Foam Element*  
Inspect Air Filter Paper Element*  
Change Engine Crankcase Oil**  
Clean and Regap Spark Plugs  
Clean Engine Cooling Fins  
x
x
x
x
x
x
Change Engine Oil Filter  
Check Fuel Lines and Clamps  
Check/Adjust Blade/Brake Action  
Replace Air Filter Paper Element*  
x
x
x
More often in extremely dusty or dirty conditions  
(see notes about air cleaner element in IMPORTANT TIPS FOR CARE OF KAWASAKI ENGINE)  
∗∗ Change engine oil and filter after first 8 hours of operation of a new engine (break-in period)  
29  
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Maintenance Instructions  
LUBRICATION  
LUBRICATION  
IMPORTANT: DO NOT operate engine without  
a sufficient oil supply in the crankcase. DO NOT  
operate with the oil level below the lower mark or  
above the upper mark on the dipstick.  
WARNING  
DO NOT attempt to lubricate the machine  
with the engine running. Disengage the  
PTO clutch, shut off the machine, and re-  
move the ignition key.  
5. If additional oil is needed, refer to Specifications  
for proper crankcase lubricant. Fill up to, but  
not above, the upper mark on the dipstick.  
IMPORTANT: DO NOT overfill the crankcase  
(oil above “F” mark) as this CAN result in en-  
gine overheating, loss of power, and possible  
engine damage.  
Proper lubrication is an important maintenance pro-  
cedure. It reduces wear and makes the machine  
quieter and easier to operate.  
Changing Engine Crankcase Oil/Oil Filter  
Engine Oil  
Change the engine crankcase oil after every 100  
hours of operation and replace the oil filter every  
other oil change (every 200 hours of operation or  
more often in extremely dusty or dirty conditions).  
Engine Break-In Oil  
No special break-in oil is required. The engine is  
serviced with 10W-30, Service Class SG oil from the  
factory. Change the oil after the initial engine break-  
in period of 5 hours. Thereafter, change oil after  
every 100 hours of operation or more often in ex-  
tremely dusty or dirty conditions.  
1. Park the mower on a level surface with the en-  
gine stopped. The engine oil should be warm  
beforedraining. Ifnotwarm from operation, start  
the engine and run a fewminutes to warm the oil.  
2. Before removing the dipstick and oil fill cap,  
clean the area around them to keep any dirt or  
debris out of the engine.  
Checking Engine Crankcase Oil Level  
Check the engine crankcase oil level before use and  
after each 5 hours of continuous operation.  
3. Remove the dipstick, oil fill cap, and unscrew  
the oil drain plug 4-1/2 revolutions (to prevent  
the drain plug from coming out completely, do  
not exceed 4-1/2 turns). Drain oil into a suitable  
container. Be sure to allow ample time for com-  
plete drainage.  
IMPORTANT: The importance of checking and  
maintaining the proper crankcase oil level can-  
not be overemphasized. Check the oil level BE-  
FORE EACH USE.  
1. Park the mower on a level surface with the en-  
gine stopped. Also, make sure the engine is  
cool and oil has had time to drain into the sump  
[allow at least five (5) minutes after stopping  
the engine].  
IMPORTANT: NEVER check or add oil with the  
engine running.  
Oil Fill/  
Dipstick  
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 without  
screwing it in.  
Oil Filter  
Oil Drain  
4. Remove the dipstick again and check the oil lev-  
el on the dipstick. The oil level should be be-  
tween the FULL and LOW mark on the dipstick.  
Oil Drain, Dipstick (Oil Fill),  
and Oil Filter Location  
30  
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Maintenance Instructions  
LUBRICATION  
4. Before removing the oil filter, clean the area  
around the filter to keep dirt and debris out of  
the engine.  
Grease Fitting and Oil Point Lubrication  
Lubricate the grease fittings and oil points after ev-  
ery 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 fittings and light machine oil (SAE  
10) to lubricate oil points. Lubricate the locations  
shown in the Chassis and Deck Lubrication  
Points illustration.  
5. Remove the old oil filter and wipe off the filter  
mounting surface on the engine.  
6. Apply a thin coating of clean oil to the rubber  
gasket on the replacement oil filter.  
IMPORTANT: Use ONLY oil filters from the en-  
gine manufacturer (Kawasaki 49065-2078). Af-  
termarket oil filters may not seal properly and/or  
may not have the correct pressure relief valve  
for proper lubrication.  
NOTE: PTO universal joints (on the deck and trac-  
tor) require routine lubrication after every 8 hours  
of running time.  
Mower Deck Gearbox Lubrication  
7. Install the new oil filter on the engine. Turn the  
filter clockwise until the rubber gasket contacts  
the sealing surface, then tighten an additional  
1/2 turn.  
NOTE: These instructions apply to all mower  
decks with gear-driven blades. Refer to DSD52  
Mower Deck Lubrication in this section for the  
DSD52 deck with belt-driven blades.  
8. Close drain valve.  
The mower deck gearboxes (tee gearbox and blade  
drive gearboxes) are connected as a unitized as-  
sembly, and oil flows freely between them. The  
gearboxes are permanently lubricated (oil filled) and  
sealed requiring no scheduled lubrication. Howev-  
er, the gearbox oil seals should be checked every  
25 hours for indication of an oil leak; particularly  
the lower seals on the blade drive gearboxes  
should be inspected, since they operate in a dirty en-  
vironment. If an oil leak is noted, replace the oil seal  
and relubricate the gearbox assembly as follows:  
9. Fill the crankcase with new, clean oil. Use only  
crankcase lubricants recommended by the en-  
gine manufacturer. Refer to Specifications in  
this manual or the engine owner’s manual. Use  
the recommended oil viscosity for the expected  
ambient temperature. Oil with the correct vis-  
cosity will aid starting in cold weather and as-  
sure proper lubrication in hot weather. Fill up  
to, but not above, the upper mark on the dip-  
stick. Crankcase capacity is 1.6 quarts (1.5 li-  
ters) plus 0.2 quart (0.2 liters) for the new oil  
filter.  
1. Remove gearbox cover (footrest). Deck orien-  
tation shouldbeinthenormaloperatingposition.  
IMPORTANT: Check the dipstick reading be-  
fore adding the last 1/2 pint of oil and fill only to  
the upper mark. DO NOT overfill the crankcase  
(oil above upper mark) as this CAN result in  
engine overheating, loss of power, and possi-  
ble engine damage.  
Blade Drive  
Gearboxes  
10. Start the engine and check for oil leaks around  
the oil filter. Stop the engine, recheck the oil lev-  
el, and add oil if necessary. (When the engine  
is first operated with a new oil filter, the oil level  
drops slightly as the filter is filled with oil.)  
Tee  
Gearbox  
Mower Deck Gearboxes  
(shown with gearbox cover removed for clarity)  
31  
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Maintenance Instructions  
LUBRICATION  
2. Clean the area around the individual gearbox  
cover plates to prevent contaminants from en-  
tering the gearcase.  
Blade  
Spindles  
3. Remove the screws securing the cover plates  
on the blade drive gearboxes.  
4. Check the level of lubricant in the gearboxes. If  
the lubricant is low, add SAE E.P. (Extreme  
Pressure) 90W oil until the oil level is up to (sub-  
merges) the horizontal shaft in the gearbox  
(shaft parallel to cover plate).  
NOTE: In case the gearboxes are completely  
drained of oil, approximately 5 fl. oz. (15 cl) of oil  
per gearbox is required to refill the gear drive  
assembly.  
Blade Spindle Lubrication (DSD52)  
NOTE: Since the gearboxes are connected as  
a unit by connector tubes, it is necessary to add  
oil slowly. Allow a few minutes after adding oil  
for the oil to flow throughout the assembly and  
the oil level to stabilize before reassembly.  
2. Check the oil level in the belt drive gearbox ev-  
ery 100 hours (or sooner if a visible oil leak has  
developed). With the deck in the normal oper-  
ating position, remove the level plug in the side  
of the gearcase. Add SAE E.P. (Extreme Pres-  
sure) 90W oil to maintain the oil level to the plug.  
If the oil level is low, check the gearbox for any  
indication of an oil leak. If an oil leak is noted,  
the gearbox will need to be removed and rebuilt.  
IMPORTANT: DO NOT overfill the deck gear-  
boxes. The gearbox assembly is not vented,  
and overfilling with oil will cause excessive pres-  
sure and result in oil leaks.  
5. Check condition of the cover gasket and replace  
if worn or damaged. Reinstall gearbox cover  
plates; torque screws to 24 in-lb (2.7 Nm).  
3. Lubricate the dolly wheel pivot every 25 hours  
with general purpose grease.  
4. Lubricate the U-Joint in the drive shaft every  
8 hours with SAE general purpose lithium or  
molybdenum base grease.  
DSD52 Mower Deck Lubrication  
There are several special lubrication requirements  
for the DSD52 mower deck in addition to the require-  
ments detailed in the Chassis and Deck Lubrica-  
tion illustration. Lubricate the locations shown in  
the Blade Spindle Lubrication and Gearbox, Dol-  
ly Wheel, and U-Joint Lubrication photos and  
check and maintain oil in the belt drive gearbox.  
Belt Drive  
Gearbox  
1. Lubricate the blade spindles every 25 hours  
with two (2) shots of SAE general purpose lithi-  
um or molybdenum base grease.  
Dolly Wheel  
Level Plug  
Pivot  
U-Joint  
Gearbox, Dolly Wheel, and U-Joint Lubrication  
32  
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Maintenance Instructions  
LUBRICATION  
Tractor PTO Gearbox Lubrication  
Transaxle Lubrication  
Checking Gearbox Oil Level  
The transaxle oil lubrication is SAE 20W-50 en-  
gine oil.  
The tractor PTO gearbox is permanently lubricated  
(oil filled) and sealed requiring no scheduled lubrica-  
tion. However, the gearbox oil seals should be  
checked every 25 hours for indication of oil leaks. If  
evidence of an oil leak is noted, replace the oil seal  
and relubricate the gearbox. The gearbox can be  
drained by removing the plug on the gearbox cover.  
Replace plug and refill gearbox using 5 fl. oz. (15cl)  
of SAE E.P. (Extreme Pressure) 90W oil.  
Inspect both transaxle cases after every 100  
hours of operation for visible leaks. If a leak is de-  
tected, the oil level should be checked through the  
breather port on top of the transaxle. Using a clean  
rod, measure the oil level by placing the rod in the fill  
port and bottoming out the rod on the bottom of the  
case. Remove the rod and measure the oil level on  
the rod. It should measure 4 to 4-1/4 in. (10 to 10.75  
cm) total depth of oil. DO NOT overfill.  
With the deck removed, the tractor unit may need to  
be tilted forward (resting on deck support arms) for  
positioning purposes, to add oil into the PTO gear-  
box.  
Steering Linkage and PTO Linkage Lubrication  
The steering and PTO linkage are located at the rear  
of the tractor below the body. The grease and oil  
points should be lubricated every 25 hours.  
CAUTION  
Do not leave the mower in this position for  
an extended period of time to prevent oil  
from draining into the heads and causing  
possible engine damage.  
Rear of Tractor  
PTO Linkage  
Lubrication Points  
PTO Gearbox  
Fill Plug  
Rear of Tractor  
Steering Linkage  
Lubrication Points  
Steering and PTO Linkage Location  
(view from underside of tractor)  
PTO Gearbox  
Drain Plug  
Tractor PTO Gearbox Location  
(view from underside of tractor)  
33  
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Maintenance Instructions  
LUBRICATION  
Ident  
No.  
Lubrication  
Type  
No.  
Places  
Ident  
No.  
Lubrication  
No.  
Places  
Location  
Location  
Type  
13 PTO Clutch Lever Pivot  
14 Parking Brake Pivot  
Grease  
Oil  
Oil***  
Grease  
Grease  
3
1
1
2
Deck Caster Wheel Fork Pivot Grease  
2
2
Deck Caster Wheel Bearing  
Grease  
15 Engine Oil  
1
2
2
3
Tee Gearbox, Deck  
Oil*  
1
16 Steering Control Linkage  
17 Tail Wheel Fork Pivot &  
Wheel Bearing (not shown)  
18 Clutch Actuator Push Rod  
19 Deck Support Pivot Arm  
4
5
6
Blade Drive Gearbox  
PTO Shaft Guard Hinge  
Oil*  
Oil  
2
1
1
Universal Joint Shaft &  
Tube Assembly  
Grease**  
Grease  
Grease  
1
2
7
8
9
Pivot Assembly, Tilt-Up Deck  
Deck Support Arm Socket  
Universal Joint Quick Connect Grease  
Spline (Grease Slide Area)  
Grease  
Grease  
4
2
1
*
Gearboxes are permanently lubricated and  
sealed requiring no scheduled lubrication.  
Oil level should be checked only when an oil  
leak is noted. Refer to Mower Deck Gear-  
box Lubrication in this section.  
10 Tilt-Up Roller Wheel  
11 Ground Drive Belt Idler Arm  
Oil  
Grease  
2
1
(not visible - access side of body)  
12 Throttle/Choke Control Pivot  
(on Control Panel) & Cable End  
Oil  
1
** Lubricate every eight (8) hours.  
*** Refer to Engine Oil in this section.  
NOTE: DSD42 Deck is shown for reference. For oth-  
er Deck Lubrication Points, Refer to Deck and  
Carrier Frame Illustrated Parts Manual.  
34  
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Maintenance Instructions  
LUBRICATION  
1
1
2
3
2
4
5
6
8
7
9
4
7
7
10  
8
7
10  
19  
12  
19  
11  
14  
16  
18  
16  
13  
15  
13  
13  
17  
12  
Chassis and Deck Lubrication Points  
35  
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Maintenance Instructions  
CLEANING  
CLEANING  
Engine Cooling Fins  
Engine Air Cleaner System  
Every 100 hours, check and clean the cooling fins  
and inside of engine shrouds to remove grass, chaff  
or dirt clogging the cooling system and causing  
overheating. When cleaning, remove the recoil  
starter and the fan housing.  
There are two components in the engine air cleaner  
system: a foam prefilter element and a paper ele-  
ment. Each component is checked, cleaned and  
maintained on a different schedule based on the fil-  
tering action required. Each component is serviced  
as follows:  
Grass Buildup in Mower Housing  
DANGER  
Paper  
Foam  
Before raising or removing the mower  
deck for cleaning, stop the engine, re-  
move the ignition key, and disconnect the  
spark plug wires.  
Element  
Element  
1. Raise the deck lock lever handle on each side  
of the carrier frame and pull out to release car-  
rier frame for tilting action.  
2. Using the carrier frame lift handle, raise deck to  
the TILT-UP position and insert the deck hook  
into the tilt-up latch on the tractor body.  
Engine Air Cleaner Foam and Paper Element  
Foam Precleaner Element  
DANGER  
Clean and inspect the foam element after every 25  
hours of service and replace the element yearly (or  
when dirty or damaged). Wash the element in de-  
tergent and water; and dry it thoroughly. More fre-  
quent cleaning may be required when operating in  
extremely dusty conditions.  
Do not operate the mower with deck in tilt-  
up position. Do not move the tractor with  
the deck in the tilt-up position.  
3. Clean grass buildup underneath the deck using  
a pressure washer (and scraper if required).  
Paper Precleaner Element  
Inspect the paper element after every 50 hours of  
service and replace the element every 200 hours  
(or when dirty or damaged). More frequent replace-  
ment may be required when operating in extremely  
dusty conditions.  
NOTE: While some degree of material buildup  
in the mower deck housing can be tolerated, a  
point is finally reached where cutting quality  
deteriorates and clogging begins to occur  
because of too much buildup on the baffling and  
housing.  
Be careful to reinstall the foam element and the pa-  
per element into the air cleaner case. Carefully re-  
install the air cleaner cover into the air cleaner body  
by putting the hooks on the bottom of the air cleaner  
cover into the air cleaner body bottom.  
4. Lower the deck to the normal operating position  
and reengage the deck lock levers.  
CAUTION  
Engine Cooling System  
Air Intake Screen  
NEVER operate the cutter blades with the  
deck in the raised position.  
Before each use, check that the air intake (rotary)  
screen is free from grass and debris and clean if  
necessary.  
36  
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CHECKING/SERVICING  
Maintenance Instructions  
CHECKING/SERVICING  
2. Raise the deck and secure it in the TILT-UP po-  
sition. Refer to CLEANING the Grass Buildup  
in Mower Housing in this section for deck rais-  
ing instructions.  
DANGER  
To prevent accidental starting of the en-  
gine when servicing or adjusting the ma-  
chine, remove the key from the ignition  
switch and disconnect the spark plug  
wires.  
DANGER  
NEVER operate cutter blades with the  
deck in the raised position.  
Battery  
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 dif-  
ference in blade tip track is more than 1/8 in.  
(3 mm), the blade is bent and should be re-  
placed.  
Charging the Battery  
Limit initial charging current to 1000mA. Charge un-  
til battery voltage (under charge) reaches 14.40 to  
14.70 volts at 68°F (20°C). Hold at 14.40 to 14.70  
volts until current drops to approximately 50mA.  
Battery is fully charged under these conditions, and  
charger should be disconnected.  
WARNING  
NOTE: Due to the self-discharge characteristics of  
this type of battery, it is imperative that it be charged  
after 6-9 months of storage, otherwise permanent  
loss of capacity might occur as a result of sulfation.  
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.  
Tire Pressure  
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 us-  
ing a rag or a thick, padded glove, while loosen-  
ing and removing the nut, lock washer, and flat  
washer that mounts the blade.  
Inflate tires to pressures shown below:  
Deck Caster Wheel = 20 PSI (137 kPa)  
Drive = 15 PSI (103 kPa)  
Rear = 20 PSI (137 kPa)  
5. Grind cutting edge at the same bevel as the  
original. Sharpen only the top of the cutting  
edge to maintain sharpness.  
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 or operating on sandy  
soils). Replace blades if worn, bent, cracked, or  
otherwise damaged (refer to REPLACING/RE-  
PAIRING the Mower Blades in this section). Use  
the following procedure to check and sharpen  
blades:  
NOTE: Blades can be sharpened with an elec-  
tric blade sharpener, conventional electric grind-  
er, or a hand file.  
CAUTION  
ALWAYS wear eye protection and gloves  
when sharpening a blade.  
NOTE: Keep blades sharp - cutting with dull  
blades not only yields a poor mowing job but  
slows the cutting speed of the mower and caus-  
es extra wear on the engine and blade drive by  
pulling hard.  
1. Stop the engine, remove ignition key, and dis-  
connect the spark plug wires before raising the  
mower deck to service blades.  
37  
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Maintenance Instructions  
CHECKING/SERVICING  
Mower Deck Gearbox Oil Seals  
Intersection  
Wear Area  
Sharpen at  
Original 30° Angle  
The mower deck gearbox seals and gaskets should  
be inspected every 25 hours for evidence of oil  
leaking; particularly the lower oil seal on the blade  
drive gearbox. This seal is protected by the trash  
guard on the blade hub and seal protector plate on  
the housing, but is still vulnerable to seal damage  
due to operating in an adverse environment. The  
mower blade must be removed for inspection of the  
seal, so it is recommended to inspect the gearbox  
seals when blades are removed for sharpening.  
If an oil leak is noted, the seal should be replaced  
and the gearbox assembly relubricated. Refer to  
Mower Deck Gearbox Lubrication in this section.  
Spark Plugs  
Wing  
Tip  
30°  
Do Not Grind or  
Sharpen on Underside  
Mower Blade Profile 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 main-  
tained by removing an equal amount of material  
from each end of the blade when sharpening.  
Every 100 hours, remove the spark plugs, inspect,  
clean, and reset the gap (or replace with new  
plugs). Clean spark plugs with a wire brush. If the  
electrodes are burned short or pitted, replace the  
plug (refer to Specifications 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.  
(0.75 mm). Reinstall and tighten to 16 ft-lb (22 N·m).  
Fuel Lines and Clamps  
Every year, inspect the fuel supply line from the tank  
to engine for deterioration or damage. Also, inspect  
the fuel line clamps for tightness. Good preventive  
maintenance calls for complete replacement of fuel  
lines and clamps every two (2) years.  
Blade Balancer  
Blade Balanced on Magnetic  
Wall-Mounted Balancer  
7. Mount the blade with wing tips pointing up into  
the housing. Reinstall the blade, washer, lock  
washer, and nut. Tighten the nut to 60 ft-lb  
(81.3 Nm).  
Drive Belts  
Look under the body and inspect the condition of the  
two (2) belts every 25 hours of operation - engine  
PTO drive, and ground drive belt. If the belts show  
signs of cracking or deteriorating, the belts  
should be replaced. Refer to REPLACING/RE-  
PAIRING the Drive Belts in this section.  
38  
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CHECKING/SERVICING  
Maintenance Instructions  
Blade Brake Action  
WARNING  
It is important to check and maintain blade  
brake action for safe operation of the ma-  
chine.  
Check the function of the cutter blade brake by en-  
gaging the blade clutch (PTO), operating the engine  
at full throttle, then disengaging the clutch and mea-  
suring how quickly the blades stop. Watch the rota-  
tion of the blade drive shaft as a visual indication that  
movement has stopped. If the brake is working  
properly, all rotation will stop five (5) seconds af-  
ter disengagement of the clutch. If the brake sys-  
tem malfunctions - blades do not stop in five (5)  
seconds - adjust or repair the brake before operating  
the mower. Refer to ADJUSTMENTS of Blade  
Clutch (PTO) in this section.  
PTO Gearbox  
Brake Band Adjustment Nuts  
on These Ends Should Be  
Adjusted Out Evenly  
Brake Band  
(View with PTO Geabox Assembly Removed)  
39  
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REPLACING/REPAIRING  
Maintenance Instructions  
REPLACING/REPAIRING  
PTO Drive Belt  
1. Remove the two mounting bolts holding the  
PTO belt guide in place and loosen the front  
mounting bolts of PTO actuator assembly (as  
shown). Remove belt guide. Remove nuts on  
the front of brake band and remove.  
DANGER  
To prevent accidental starting of the en-  
gine when replacing parts or repairing the  
machine, remove the key from the ignition  
switch and disconnect the spark plug  
wires.  
2. Unhook spring and unbolt actuator clevis at-  
tached to the PTO gearbox assembly. Pull  
gearbox assembly to the rear and remove belt.  
3. Install the PTO drive belt by reversing removal  
procedure.  
IMPORTANT: ALWAYS use genuine factory re-  
placement parts. Substitute parts CAN result in  
product malfunction and possible injury to the oper-  
ator and/or others.  
Ground Drive Belt  
NOTE: The PTO drive belt must be removed for re-  
moval of the ground drive belt.  
Drive Belts  
There are two (2) individual belts:  
1. Relax the belt by releasing spring tension from  
the ground drive belt idler arm.  
Ground Drive Belt  
PTO Drive Belt (3 Groove Power Band)  
2. Slide the belt over both transaxle pulleys and  
feed it toward the back of the mower.  
The belts may be removed and replaced using the  
following procedures:  
3. Install ground drive belt by reversing removal  
procedure.  
Ground Drive  
Idler Pulley  
Ground  
Drive Belt  
PTO  
Drive Belt  
Remove Spring and  
Linkage  
Remove Mounting Bolts and  
Loosen Front Bolts  
(not shown)  
PTO Drive and Ground Drive Belt Removal  
(view from underside rear of tractor)  
40  
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Maintenance Instructions  
REPLACING/REPAIRING  
Blade Overload Shear Bolts  
When the PTO pin has sheared, use the following  
procedure to replace it:  
NOTE: Shear bolts are not used on the DSD52  
1. Loosen the two bolts securing the PTO shaft  
guard on the deck; lift the guard off. (Holes in  
guard are slotted for easy removal.)  
mower deck.  
The cutting blade is keyed to the blade hub by two  
(2) shear bolts (10-24 x 5/8 in. stainless steel ma-  
chine screws). These bolts are designed to shear  
and protect the blade drive gearbox from damage if  
the blade encounters a shock load.  
2. Rotate U-joint on shaft to align the shear pin  
hole with the hole (and shear pin fragment) in  
the shaft. Use a punch to drive the remaining  
portion of the old shear pin out.  
3. Install new shear pin and secure with cotter pin.  
Shear Pin  
Split Spring Pin  
Cutting Blade  
Shear Bolts  
U-Joint  
Tube Assembly  
U-Joint  
Shaft Assembly  
Cotter Pin  
Cutting Blade Shear Bolts  
PTO Shear Pin  
NOTE: Tightening the 5/8-18 blade mounting nut  
to 60 ft-lb (81.3 Nm) is also important for proper  
shock load protection. It is important to not over-  
tighten the mounting nut since this defeats (over-  
rides) the function of the shear bolts.  
IMPORTANT: Use only Walker P/N 8067-13  
shear pins for replacement to provide proper  
shock protection -- these pins are hardened to  
shear under a specific amount of load.  
If these bolts shear, remove the blade and install new  
bolts. Refer to CHECKING/SERVICING in this sec-  
tion for Sharpen Mower Blades which describes the  
blade removal and installation procedure.  
4. Reinstall the PTO shaft guard.  
Before operating the deck, inspect the blade over-  
load shear bolts and also check blade timing (on  
gear driven decks) by moving blades through one (1)  
complete revolution. Make sure blade tips pass  
clear of each other. If timing is incorrect, refer to  
Mower Deck Gearbox Replacement in this section.  
After reinstalling the blade, check blade timing by  
moving blades through one (1) complete revolu-  
tion. Make sure blade tips pass clear of each other.  
If timing is incorrect, refer to Mower Deck Gearbox  
Replacement in this section.  
Mower Blades  
PTO Shear Pin  
Mower blades are removed and remounted as de-  
scribed in Sharpen Mower Blades instructions.  
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 safety and performance of  
the machine:  
The PTO drive shaft connection to the deck gearbox  
has a shear pin to provide shock load protection to  
the mower deck drive. This system provides prima-  
ry shock protection in case of blade impact and will  
normally shear before the individual shear bolts on  
the blade hub.  
41  
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Maintenance Instructions  
REPLACING/REPAIRING  
An excessive amount of the flat 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) flat section remains at the  
blade tip.  
CAUTION  
ALWAYS use genuine factory replacement  
parts. Substitute parts CAN result in prod-  
uct malfunction and possible injury to the  
operator.  
Examine ends of the blade carefully, especially  
the intersection where the flat section of the blade  
turns up to form the “wing tip” (refer to Mower Blade  
Profile for Sharpening illustration in Sharpen  
Mower Blades instructions). Since sand and abra-  
sive material 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.  
Mower Deck Gearbox Replacement  
NOTE: Deck gearbox(es) may be changed with  
the deck mounted on the tractor. However, the deck  
may be removed from the tractor making the overall  
job of removing the gearbox assembly easier. Refer  
to Deck Installation in Assembly Instructions and re-  
verse the procedure to remove the deck.  
DANGER  
To replace the mower deck gearbox(es), use the fol-  
lowing procedure:  
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.  
1. Remove mower blades. Refer to procedure in  
Sharpen Mower Blade instructions.  
2. Remove gearbox cover (two machine screws)  
and PTO shaft guard (two 1/4-20 bolts).  
3. Remove two (2) 3/8-16 mounting bolts from  
each blade drive gearbox and lift the entire  
gearbox assembly from the deck (including  
PTO drive shaft).  
Check the blades for straightness by marking  
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.  
4. Remove the screws securing the cover plates  
on the gearboxes and remove the covers. Re-  
move all covers to be sure oil is completely  
drained from all gearboxes.  
Inspect the blade surface, especially in formed  
areas, for cracks. Replace the blade if any cracks  
are found.  
NOTE: With oil flow throughout the unitized  
gear drive assembly; if one gearbox has internal  
damage or excessive wear, the remaining gear-  
boxes and connector tubes should be complete-  
ly disassembled and thoroughly flushed out with  
solvent before reassembly.  
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.  
5. Drain and properly dispose of oil.  
6. Remove the four (4) bolts mounting the gearbox  
to the connector tube and slide the gearbox off  
the splined drive shaft coupling.  
Reinstall the blades following procedure from  
Sharpen Mower Blades instructions. If blades are  
replaced, 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  
guaranteed, they could be dangerous.  
42  
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REPLACING/REPAIRING  
ADJUSTMENTS  
Maintenance Instructions  
7. Install the new gearbox on the spline coupling of  
the drive shaft. Establish correct timing of the  
blade drive gearboxes by setting flats on the  
output shaft at 90 degrees when connecting the  
gearbox(es) to the spline coupling. Make sure  
the timing is correct before proceeding with as-  
sembly.  
ADJUSTMENTS  
DANGER  
If the engine must be running to perform  
a maintenance adjustment, keep hands,  
feet, and clothing from moving parts. DO  
NOT wear jewelry or loose clothing.  
8. Reinstall the four (4) bolts mounting the gear-  
box to the connector tube but do not tighten  
them at this time; leave connector tube bolts fin-  
ger-tight.  
Blade Clutch (PTO)  
Clutch Disengagement/Brake Action  
9. Position the gear drive assembly on the deck  
and install the 3/8-16 bolts mounting the entire  
assembly. Leave the mount bolts finger-tight.  
WARNING  
10. Torque all the connector tube bolts to 80 in-lb  
It is important to check and maintain blade  
brake action for safe operation of the ma-  
chine.  
(9 Nm); then tighten the deck mount bolts.  
NOTE: This fastener tightening sequence  
aligns the gearbox assembly with the deck hous-  
ing and eliminates the possibility of mounting the  
unitized assembly in a bind.  
The blade brake is activated by linkage to the clutch  
pulley mechanism. The brake is designed to stop  
the blades within five (5) seconds after disengaging  
the clutch.  
11. Fill gearbox assembly with oil. Refer to Mower  
Deck Gearbox Lubrication in this section for  
instructions.  
Use the following procedure to check and adjust  
clutch disengagement and brake action:  
12. Reassemble remaining items onto deck to com-  
plete installation. After installing blades, check  
that the blade timing is correct by moving the  
blades through one (1) complete revolution.  
Make sure blade tips pass clear of each other.  
1. Evenly adjust the nuts on the end of the brake  
band to achieve 1/4" of travel of the PTO gear-  
box assembly between the engaged and the  
disengaged position (refer to PTO Gearbox En-  
gagement Photo).  
Assembly Should  
Move 1/4" Between  
Engaged and  
Disengaged  
Position  
Brake Band  
Adjustment Nuts  
Located at Front  
of Assembly  
Mower Deck Gearboxes  
(Shown with Gearbox Cover Removed for Clarity)  
(Not Visible)  
PTO Gearbox Engagement  
(view from underside of tractor)  
43  
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Maintenance Instructions  
ADJUSTMENTS  
2. Use the adjustment nut on the PTO clutch actu-  
ator assembly (refer to PTO Clutch Linkage  
Adjustment photo) to set the tension applied  
by the PTO clutch lever. The adjustment nut is  
initially set to achieve an approximate measure-  
ment of 2-3/4" between the jam nut and the  
knuckle joint. As the belt and pulleys wear, it will  
be necessary to tighten the adjustment nut in  
order to prevent belt slippage--this adjustment  
is the same in the Engaged and Disengaged  
positions.  
NOTE: It would not be unusual for a new machine,  
after initial 5 or 10 hours of operation, to begin to not  
travel straight (this is due to the break-in of the trans-  
missions). In this case, proceed to Tracking Adjust-  
ment - Step 4.  
IMPORTANT: The following adjustment proce-  
dures are sequential. Check and adjust each func-  
tion in the order given.  
FSC Actuator Stop Adjustment - Step 1  
1. Loosen jam nut and back off the adjustment bolt  
located in the steering pivot rod (as shown).  
Do not overtighten the adjustment nut. This may  
cause damage to the clutch linkage and the PTO  
belt.  
2. Turn the ignition key to the ON position and tog-  
gle the FSC switch to the Neutral position (fully  
retracted).  
Adjustment Nut  
3. Tighten the adjustment bolt until it contacts the  
chassis and turn an additional 1/2 turn. Tighten  
jam nut.  
Transmission Lockout  
Rod (RH)  
Spring Length  
Should be 2-3/4"  
Steering Control Rod  
PTO Clutch Linkage Adjustment  
Transmission Control  
Rear of  
Tractor  
Jam Nut  
Adjustment Nut  
DANGER  
FSC Actuator Stop Adjustment  
(View from underside of tractor)  
If the engine must be running to perform  
a maintenance adjustment, keep hands,  
feet, and clothing from moving parts. DO  
NOT wear jewelry or loose clothing.  
IMPORTANT: The proper adjustment of the trans-  
mission control stops is essential for efficient oper-  
ation and life of the transmission. These stops are  
properly adjusted at the factory and should only re-  
quire readjustment if the transmission or related  
control linkage is removed or changed.  
44  
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Maintenance Instructions  
ADJUSTMENTS  
Control Arm Rod Adjustment - Step 2  
NOTE: If the 1/8" to 3/16" gap between speed  
control actuator and speed control stop can not  
be maintained as neutral adjustments are made,  
it will be necessary to adjust the length of the  
control rod (Step 2). Increasing the length of the  
control rod, decreases the gap. Shortening the  
control rod, increases the gap.  
1. For both control arm rods, loosen jam nut on  
ball joint end of control arm rod and adjust to ob-  
tain a 1-1/4" measurement between jam nuts  
(4-1/2" measurement between centers of ball  
joints). Tighten jam nuts.  
1/8" to  
3/16" Gap  
Adjust Bolt to  
Achieve 1/8" to  
3/16" Gap  
4-1/2"  
1-1/4"  
Speed Control Actuator Adjustment (LH)  
Tracking Adjustment - Step 4  
DANGER  
If the engine must be running to perform  
a maintenance adjustment, keep hands,  
feet, and clothing from moving parts. DO  
NOT wear jewelry or loose clothing.  
Control Arm Rod Adjustment - Both Transaxles  
(view from underside of tractor)  
1. Start engine and set the FSC switch to a normal  
walking speed. Check for equal drive speed for  
both wheels.  
Neutral Adjustment - Step 3  
1. Turn the ignition key to the ON position and tog-  
gle the FSC switch to the Neutral position (fully  
retracted).  
2. Tighten adjustment bolt in speed control actua-  
tor to achieve approximately an 1/8" to 3/16"  
gap between speed control actuator and speed  
control stop.  
3. Make identical adjustment to the other side of  
tractor.  
4. Start engine. If one or both drive wheels creep  
forward, turn corresponding adjustment bolt in  
(toward rear of mower). If drive wheels creep  
backwards, turn corresponding adjustment bolt  
out (toward front of mower).  
45  
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Maintenance Instructions  
ADJUSTMENTS  
2. If one wheel is moving too fast, bring the mower  
back into NEUTRAL (using the FSC switch) and  
slightly tighten the adjustment bolt on the speed  
control actuator on the side that is moving faster.  
2. Reattach handlebar and control arms in corre-  
sponding holes.  
Handle Bar  
Attachment to Body  
Tighten Bolt to  
Slow Down  
Travel Speed  
Adjustable Steering  
Control Rod  
Handlebar Height Adjustment  
Tracking Adjustment  
Control Handle (Pistol Grip) Adjustment - Step 5  
1. Loosen jam nut and adjust upper ball joint on  
upper lever linkage to achieve a 1" gap between  
control handle and pistol grip.  
Jam Nut  
2. Make identical adjustment to the other side of  
handle. It may be necessary to adjust both  
wheels in order to achieve tracking and neutral.  
Set Screw  
A
c
h
i
e
v
Tilt-Up Deck Adjustable Stop  
Tilt-Up Deck Adjustable Stop  
e
1
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When the carrier frame hinge joint is properly adjust-  
ed, the deck lock levers should move in and out of  
the engaged and disengaged positions freely. All  
four hitch pins used for height adjustment should sit  
flush on the washers above the deck pin bushing.  
On a level surface, if any pin is sticking up (likely the  
front pins), tighten the opposite side or loosen the  
existing side to lower the pin. Adjustments are made  
by loosening the jam nut and tightening or loosening  
the set screws on the Deck Mount Pivot Brackets.  
Retighten the jam nut when the adjustment is com-  
plete.  
Use Ball Joint  
End to Adjust  
Pistol Grip Position Adjustment  
Handlebar Height Adjustment  
The height of the handlebar position for operators  
can be adjusted (taller for taller operators, shorter for  
shorter operators) using the following steps:  
1. Unbolt the handlebar connection at the body on  
both sides. Unbolt the steering control arms.  
46  
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Maintenance Instructions  
ADJUSTMENTS  
Carburetor  
CAUTION  
DO NOT change the engine governor set-  
tings or overspeed the engine. The gov-  
ernor has been factory set for maximum  
safe engine operating speed.  
Carburetor adjustments are required to compensate  
for differences in altitude, temperature, and fuel.  
Once the carburetor has been set, no further adjust-  
ments should be required. However, if the engine  
exhibits any of the following symptoms, the carbure-  
tor adjustment should be checked by an authorized  
Kawasaki engine dealer: black, sooty exhaust  
smoke, lack of power, engine miss or backfire, hard  
to start, rough running or idle.  
47  
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6
5
F375  
F025  
F375  
4
7
3
F375  
NOTE: A 2-1/2" diameter tilt-up roller wheel (P/N 9772) is  
required for decks installed on the walk-behind.  
Refer to page 16 for Installation Instructions.  
8
1
9
11  
10  
F002  
F375  
2
4
F013  
12  
F026  
F029  
22  
F151  
F098  
F068  
F055  
F034  
13  
F032  
23  
24  
F004  
F009  
21  
25  
26  
17  
20  
F023  
F004  
F034  
19  
F005  
F031  
15  
24  
23  
27  
F009  
14  
18  
28  
15  
16  
F012  
F029  
F020  
F047  
49  
50  
F031  
F005  
F341  
F342  
F029  
53  
51  
52  
29  
31  
55  
F002  
39  
26  
F020  
47  
33  
F027  
F093  
30  
34  
F342  
F004  
F275  
F093  
F235  
31  
40  
39  
F020  
F029  
46  
54  
F004  
36  
48  
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32  
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39  
42  
40  
26  
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39  
45  
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F002  
F009  
44  
F002  
F009  
38  
43  
17  
38  
F255  
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41  
34  
38  
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F015  
38  
35  
F035  
F255  
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26  
36  
F009  
37  
49  
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56  
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17  
F348  
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4
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10  
11  
19  
7
3
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9
20  
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18  
21  
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4
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26  
24  
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1
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22  
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23  
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57  
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58  
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4
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59  
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WALKER MODEL MW  
Beginning S/N 2004-68081  
RED/YEL  
BRN/WHT  
BRN  
S1 = START CIRCUIT  
S2 = START/ACCESSORY CIRCUIT  
M = MAGNETO GROUND CIRCUIT  
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A = ACCESSORY CIRCUIT  
G = GROUND CIRCUIT  
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60  
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61  
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Operator’s Notes  
62  
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LIMITED WARRANTY  
FOR  
WALKER  
COMMERCIAL RIDER MOWER  
1.  
WHAT THIS WARRANTY COVERS, AND FOR HOW LONG:  
Walker Manufacturing company will, at its option, repair or replace, without charge, any part covered by this warranty which  
is found to be defective in material and/or 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 Walker’s  
request, customer will make the defective part available for inspection by Walker and/or return the defective part to Walker,  
transportation charges prepaid. All parts and components of the Walker Mower are covered by this warranty except the  
following components which are warranted separately by their respective manufacturers:  
Kawasaki Engine  
HydroGear Transaxles  
Peerless Gearboxes  
Battery  
Tires  
The available warranties covering these items are furnished with each mower. Walker does not assume any warranty obli-  
gation, liability or modification for these items, which are covered exclusively by the stated warranty of the respective man-  
ufacturers noted above.  
2.  
WHAT THIS WARRANTY DOES NOT COVER:  
A.  
B.  
This warranty does not cover defects caused by depreciation or damage caused by normal wear, accidents, improper  
maintenance, improper use or abuse of the product, alterations, or failure to follow the instructions contained in the  
Owner’s Manual for operation and maintenance.  
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.  
4.  
HOW TO OBTAIN SERVICE UNDER THIS WARRANTY:  
Warranty service can be arranged by contacting the dealer where you purchased the mower or by contacting Walker Man-  
ufacturing Company, 5925 East Harmony Road, Ft. Collins, CO 80528. Proof of the date of purchase may be required to  
verify warranty coverage.  
WARRANTY LIMITATION:  
A.  
THERE IS NO OTHER EXPRESS WARRANTY. ANY WARRANTY THAT MAY BE IMPLIED FROM THIS  
PURCHASE INCLUDING MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE IS HEREBY  
LIMITED TO THE DURATION OF THIS WARRANTY AND TO THE EXTENT PERMITTED BY LAW ANY AND ALL  
IMPLIED WARRANTIES ARE EXCLUDED. Some states do not allow limitations on how long an implied warranty  
lasts, so the above limitations may not apply to you.  
B.  
WALKER WILL NOT BE LIABLE FOR ANY INCIDENTAL, CONSEQUENTIAL, OR SPECIAL DAMAGES AND/OR  
EXPENSES IN CONNECTION WITH THE PURCHASE OR USE OF THE MOWER. Some states do not allow the  
exclusion or limitation of incidental or consequential damages, so the above limitation(s) or exclusion(s) may not  
apply to you.  
C. Only the warranty expressed in this limited 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 specific legal rights, and you may also have other rights which vary from state to state.  
63  
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WALKER MFG. CO. 5925 E. HARMONY ROAD, FORT COLLINS, CO 80528 (970) 221-5614  
FORM NO. 110103  
PRINTED IN USA  
©2004 WALKER MFG. CO  
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