Walker Lawn Mower MT MTL MTEFI MTLEFI User Guide

OWNER’S MANUAL  
Safety, Assembly, Operating, and Maintenance Instructions  
Model MT (20.0 HP)  
Model MTL (25.0 HP)  
Model MTEFI (26.0 HP)  
(Covers 2004 Production)  
Please Read and Save These Instructions  
For Safety, Read All Safety and Operation  
Instructions Prior to Operating Machine  
Effective Date: 01-01-04  
P/N 8000-9  
Price $5.00  
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Table of Contents  
Operating Instructions_____________ 31  
General Information ________________ 4  
CONTROL IDENTIFICATION,  
HIGHLIGHTED INFORMATION _____________ 4  
GLOSSARY ____________________________ 4  
IDENTIFYING NUMBER LOCATIONS________ 4  
ENGINE SERIAL NUMBER LOCATION ______ 5  
SERVICING OF ENGINE AND  
LOCATION, AND FUNCTION _____________ 31  
Operating Controls ___________________ 31  
Engine Choke - (Model MT and MTL only) 31  
Engine Throttle _____________________ 32  
Forward Speed Control (FSC) _________ 32  
Steering Levers _____________________ 32  
Blade Clutch (PTO) __________________ 32  
Parking Brake ______________________ 32  
Front Body Latch Release ____________ 34  
Transmission Lockout Levers __________ 34  
Optional Cold Start Lever  
(Jackshaft Drive Belt Release) _________ 34  
Instrument Panel _____________________ 35  
Hourmeter _________________________ 36  
Voltmeter _________________________ 36  
Oil Pressure Warning Light ____________ 36  
Over Temperature Warning Light  
DRIVETRAIN COMPONENTS ______________ 5  
Specifications________________________ 6  
ENGINE________________________________ 6  
ELECTRICAL SYSTEM ___________________ 7  
TRANSMISSION_________________________ 7  
BLADE DRIVE __________________________ 8  
TIRE SIZE ______________________________ 8  
TIRE PRESSURE ________________________ 8  
DIMENSIONS (Tractor and Mower) _________ 8  
MOWER DECK__________________________ 8  
CURB WEIGHT__________________________ 9  
DRIVE BELTS___________________________ 9  
GHS SYSTEM (Optional)__________________ 9  
SEAT_________________________________ 10  
FRAME/BODY CONSTRUCTION __________ 10  
(Model MT and MTEFI Only) __________ 36  
Water Temperature Warning Light  
(Model MTL) _______________________ 36  
Water Temperature Gauge (Model MTL) _ 36  
Engine Service Light - Model MTEFI ____ 36  
Ignition Switch ______________________ 37  
Light Switch (For Optional Lights) _______ 37  
Warning Horn ______________________ 37  
Circuit Breakers ____________________ 37  
STARTING THE ENGINE_________________ 38  
ADJUSTING GROUND  
Component Identification__________ 11  
Safety Instructions _________________ 16  
BEFORE OPERATING___________________ 16  
OPERATING___________________________ 17  
MAINTENANCE ________________________ 18  
SAFETY, CONTROL  
SPEED AND STEERING _________________ 39  
ENGAGING THE MOWER________________ 40  
STOPPING THE MACHINE _______________ 41  
ADJUSTING CUTTING HEIGHT ___________ 42  
TRANSMISSION LOCKOUT ______________ 42  
RECOMMENDATIONS FOR MOWING ______ 43  
RECOMMENDATIONS FOR TILT-UP DECK  
OPERATION/TRANSPORT _______________ 44  
GRASS HANDLING SYSTEM (GHS) _______ 45  
General Information __________________ 46  
Clogging Checklist ___________________ 47  
Using the Tilt-Up Deck ________________ 48  
Using the GHS Catcher________________ 48  
Powerfil ® _________________________ 48  
“Full” Signal Horn ___________________ 48  
Cleaning the GHS Exhaust Screen ______ 48  
Dumping the Catcher _________________ 49  
Tailgate Dumping ___________________ 49  
Using the Dump Bag _________________ 49  
Power Dump Option _________________ 50  
AND INSTRUCTION DECALS _____________ 20  
Assembly Instructions _____________ 22  
SETUP INSTRUCTIONS _________________ 22  
Tire Installation (Tractor)_______________ 22  
Battery Service_______________________ 22  
Wet Battery Service __________________ 22  
Dry Battery Service __________________ 22  
Battery Charging ____________________ 23  
Battery Installation ___________________ 23  
Mower Deck Assembly ________________ 24  
Deck Caster Wheels Installation ________ 24  
Deck Discharge Chute Installation ______ 24  
Deck Discharge Shield Installation ______ 25  
PTO Shaft Guard Installation __________ 25  
Tilt-Up Roller Wheel Installation ________ 25  
Mower Deck lnstallation on Tractor ______ 25  
Deck Installation ____________________ 25  
Deck Leveling ______________________ 27  
PREOPERATING CHECKLIST ____________ 28  
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Table of Contents  
Mower Deck Gearbox Oil Seals _________ 71  
Spark Plugs _________________________ 71  
Ignition Wires________________________ 71  
Fuel Lines and Clamps ________________ 71  
Radiator Hoses and Clamps - MTL ______ 71  
Engine Starter _______________________ 71  
Blade Brake Action ___________________ 71  
PTO U-Joints ________________________ 71  
REPLACING/REPAIRING ________________ 72  
Drive Belts __________________________ 72  
Engine PTO Drive Belt _______________ 73  
Jackshaft Drive Belt _________________ 74  
GHS Blower Drive Belt _______________ 75  
Hydrostatic Ground Drive Belt _________ 76  
Fuel Filter - Model MT and MTL _________ 77  
Fuel Filter - MTEFI ____________________ 77  
Blade Overload Shear Bolts ____________ 77  
PTO Shear Pin _______________________ 78  
Mower Blades _______________________ 78  
Mower Deck Gearbox Replacement______ 79  
GHS Blower Assembly ________________ 80  
GHS Blower Assembly Removal _______ 80  
Blower Wheel Removal ______________ 80  
Blower Wheel Installation _____________ 81  
GHS Blower Assembly Installation ______ 81  
ADJUSTMENTS________________________ 82  
Safety Switches ______________________ 82  
Tail Wheel Bearing Preload ____________ 82  
Steering Levers ______________________ 82  
Blade Clutch (PTO) ___________________ 83  
Clutch Engagement/Belt Tension _______ 83  
Clutch Disengagement/Brake Action ____ 84  
Stop Block Eccentric Adjustment _______ 85  
Clutch Idler Pulley Travel Adjustment ____ 85  
Blade Brake Band Adjustment _________ 85  
Transmission Control _________________ 86  
Set Forward Travel Limit (Stop) ________ 86  
Steering Lever End Play Adjustment ____ 87  
Neutral Function Adjustment __________ 87  
Straight Ground Travel Adjustment _____ 88  
Forward Speed Control Friction Lock ____ 88  
Tilt-Up Deck Adjustable Stop ___________ 89  
Carburetor - MT ______________________ 89  
Engine Idle Adjustment _______________ 89  
Carburetor - MTL _____________________ 90  
Low Idle Speed (RPM) Adjustment ______ 90  
GHS “Full” Signal Horn  
Maintenance Instructions__________ 52  
MAINTENANCE SCHEDULE CHART _______ 52  
IMPORTANT TIPS FOR CARE  
OF THE KOHLER ENGINE _______________ 53  
Fuel System _________________________ 53  
Starting/Stopping_____________________ 53  
Cooling System - MT, MTEFI____________ 53  
Cooling System - MTL _________________ 53  
Air Cleaner System ___________________ 53  
Oil _________________________________ 54  
LUBRICATION _________________________ 54  
Engine Oil ___________________________ 54  
Engine Break-In Oil __________________ 54  
Checking Engine Crankcase Oil Level ___ 54  
Changing Engine Crankcase Oil/Oil Filter _ 55  
Grease Fitting and Oil Point Lubrication __ 55  
Mower Deck Gearbox Lubrication _______ 58  
DSD52 or DSD62 Mower Deck Lubrication 58  
Tractor PTO Gearbox Lubrication _______ 59  
Checking Gearbox Oil Level ___________ 59  
Changing Gearbox Oil ________________ 59  
Gear Axle Lubrication _________________ 59  
Hydrostatic Transmission Fluid _________ 60  
Checking Hydrostatic  
Transmission Fluid Level ______________ 60  
Changing Hydrostatic Transmission Fluid _ 60  
CLEANING ____________________________ 61  
Engine Air Cleaner System _____________ 61  
Turbine Precleaner __________________ 62  
Donaldson Radialseal™ Air Cleaner _____ 62  
Engine Cooling System - MT20 and MTEFI 64  
Air Intake System ___________________ 64  
Cylinder Head Cooling Fins ____________ 64  
Engine Cooling System - MTL __________ 64  
Radiator Screen and Cooling Fins ______ 64  
Flushing Radiator and Changing Coolant _ 65  
Grass Buildup in Mower Housing________ 65  
GHS Blower _________________________ 66  
GHS Exhaust Screen __________________ 66  
Hydrostatic Transmission Cooling Fins __ 67  
CHECKING/SERVICING _________________ 67  
Engine Cooling System - MTL __________ 67  
Coolant Level ______________________ 67  
Security of Air Filtration Components ____ 68  
Battery______________________________ 68  
Electrolyte Level ____________________ 68  
Cleaning the Terminals _______________ 69  
Charging the Battery _________________ 69  
Tire Pressure ________________________ 69  
Wheel Bolt Torque ____________________ 69  
Sharpen Mower Blades ________________ 69  
Drive Belts __________________________ 70  
with Grass-Pak® Switch _______________ 91  
Adjustment  
(When Horn Sounds at Wrong Time)_____ 91  
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Table of Contents  
ELECTRICAL SYSTEM __________________ 92  
Circuit Breakers ______________________ 92  
Wiring Diagram - Model MT_____________ 93  
Wiring Diagram - Model MTEFI __________ 94  
Wiring Diagram - Model MTL____________ 96  
Warranty ___________________________ 97  
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General Information  
HIGHLIGHTED INFORMATION  
LEFT HAND (LH) refers to the left-hand side of  
the tractor when the operator is seated facing  
forward in the tractor seat.  
Walker Manufacturing recommends that any ser-  
vice requiring special training or tools be performed  
by an authorized Walker Mower Dealer. There are  
several general practices to be aware of in the area  
of safety. Most accidents associated with the oper-  
ation or maintenance of a Walker Mower are  
caused by disregarding basic safety precautions or  
specific warnings. Such accidents, in most cases,  
can be prevented by being aware of the dangers  
present.  
POWER TAKE-OFF (PTO) transmits engine  
power to run the cutter blades and GHS blower.  
POWERFIL spreads the mowed material  
throughout the interior of the grass catcher by  
an oscillating delivery spout.  
RIGHT HAND (RH) refers to the right-hand side  
of the tractor when the operator is seated facing  
forward in the tractor seat.  
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.  
SIDE DISCHARGE (SD) mows but does not  
collect the mowed material.  
STEERING LEVERS steer the tractor by con-  
trolling the dual hydrostatic transmissions.  
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  
using this manual:  
TRACTOR is the prime mover, including the en-  
gine, drive train, operator seat, and controls to  
operate the mower.  
TRANSMISSION LOCKOUT releases the hy-  
drostatic transmissions to permit freewheeling  
the tractor.  
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.  
IDENTIFYING NUMBER LOCATIONS  
ELECTRONICCONTROL UNIT (ECU)controls  
engine functions such as spark timing, fuel/air  
ratio, etc.  
The tractor serial number plate is affixed to the trac-  
tor body just below the left rear corner of the seat.  
The mower deck serial number plate is affixed  
alongside the angle iron framing on the RH side of  
the RH mower blade drive. Model and serial num-  
bers are helpful when obtaining replacement parts  
and maintenance assistance. For ready reference,  
please record these numbers in the space provided.  
FORWARD SPEED CONTROL (FSC) controls  
the maximum forward speed of the tractor;  
functioning as a cruise control.  
GRASS HANDLING SYSTEM (GHS ) collects  
mowed material and deposits it in the catcher.  
Tractor Model No. _______________________  
Tractor Serial No. _______________________  
GRASS-PAK SWITCH is mounted on the  
grass delivery spout (in the catcher) and acti-  
vates the “full” signal horn when the grass  
catcher is full.  
Deck Serial No.  
_______________________  
GROUND DRIVE refers to the dual hydrostatic  
transmissions which drive the main wheels.  
Engine Model No. _______________________  
Engine Serial No. _______________________  
Date of Purchase _______________________  
HYDROSTATIC TRANSMISSION transmits  
and controls power from the ground drive belt to  
the main drive wheel.  
Fill In By Purchaser  
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