Walker Rider Lawnmowers MB User manual

™
OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
and ILLUSTRATED PARTS MANUAL
Model MB (18 HP)
Please Read and Save These Instructions Effective Date: 09-01-06
For Safety, Read All Safety and Operation P/N 4000-3
Instructions Prior to Operating Machine

Foreword
Thank you. . .for purchasing a Walker mower. Every effort has been made to provide you with the
most reliable mower on the market, and we are sure you will be among our many satisfied custom-
ers. If for any reason this product does not perform to your expectations, please contact us at (970)
221-5614. Every customer is important to us. Your satisfaction is our goal.
Please. . .read this manual thoroughly! This manual is to be used in conjunction with the engine
manufacturer's manual for the specificengineonthemowermodelyouhave purchased. Beforeyou
operate your new mower,please read this entire manual. Some of the information is crucial for prop-
er operation and maintenance of this mower - it will help protect your investment and ensure that the
mower performs to your satisfaction. Some of the information is important to your safety, and must
be read and understood to help prevent possible injury to the operator or others. If anything in this
manual is confusing or hard to understand, please call our service department, at [phone],
for clarification before operating or servicing this mower.
This manual covers Model MB with the Briggs & Stratton Vanguard 18 HP gasoline engine.
All shields and guards must be in place for the proper and safe operation of this machine.
Where they are shown removed in this manual, it is for illustration purposes only. Do not operate
this machine unless all shields and guards are in place.
Specifications given are based on the latest information available at the time this manual was
produced.
Walker Mfg. Co. is continually striving to improve the design and performance of its products. We
reserve the right to make changes in specifications and design without thereby incurring any obli-
gation relative to previously manufactured products.
Sincerely,
WALKER MANUFACTURING COMPANY
Bob Walker, President

Table of Contents
1
Owner’s Manual
General Information________________ 3
HIGHLIGHTED INFORMATION _____________ 3
GLOSSARY ____________________________ 3
IDENTIFYING NUMBER LOCATIONS________ 3
ENGINE SERIAL NUMBER LOCATION ______ 4
SERVICING OF ENGINE AND
DRIVETRAIN COMPONENTS ______________ 4
Specifications _______________________ 5
Component Identification___________ 8
Safety Instructions _________________ 11
BEFORE OPERATING___________________ 11
OPERATING___________________________ 12
MAINTENANCE ________________________ 13
SAFETY, CONTROL, AND
INSTRUCTION DECALS _________________ 15
Assembly Instructions _____________ 17
SETUP INSTRUCTIONS _________________ 17
Battery Service_______________________ 17
Mower Deck Assembly ________________ 17
Deck Caster Wheels Installation ________ 17
Deck Discharge Shield Installation ______ 17
PTO Shaft Guard Installation __________ 18
Tilt-Up Roller Wheel Installation ________ 18
Mower Deck Installation on Tractor ______ 18
Deck Installation ____________________ 18
Deck Leveling ______________________ 20
PREOPERATING CHECKLIST ____________ 21
Operating Instructions_____________ 24
CONTROL IDENTIFICATION,
LOCATION, AND FUNCTION _____________ 24
Ignition Switch _______________________ 24
Engine Choke________________________ 25
Engine Throttle_______________________ 25
Forward Speed Control (FSC)___________ 25
Steering Levers ______________________ 25
Blade Clutch (PTO) ___________________ 25
Parking Brake________________________ 26
Transaxle Lockout Rods _______________ 26
Hourmeter___________________________ 26
STARTING THE ENGINE_________________ 28
ADJUSTING GROUND
SPEED AND STEERING _________________ 28
ENGAGING THE MOWER________________ 30
STOPPING THE MACHINE _______________ 31
ADJUSTING CUTTING HEIGHT ___________ 31
TRANSAXLE LOCKOUTS________________ 32
RECOMMENDATIONS FOR MOWING ______ 32
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT_______________ 33
Maintenance Instructions___________34
MAINTENANCE SCHEDULE CHART_______ 34
IMPORTANT TIPS FOR CARE OF THE
BRIGGS & STRATTON ENGINE___________ 35
Fuel System _________________________ 35
Starting_____________________________ 35
Cooling System ______________________ 35
Air Cleaner __________________________ 35
Oil _________________________________ 35
LUBRICATION_________________________ 36
Engine Oil___________________________ 36
Engine Break-In Oil ___________________36
Checking Engine Crankcase Oil Level ____36
Changing Engine Crankcase Oil/Oil Filter _36
Grease Fitting and Oil Point Lubrication__ 37
Mower Deck Gearbox Lubrication _______ 40
Transaxle Lubrication _________________ 40
Transaxle Oil and Filter Change_________ 40
CLEANING____________________________ 41
Engine Air Cooling System ____________ 41
Air Cleaner System ___________________ 42
Grass Buildup in Mower Housing _______ 42
Transaxle Cooling Fins________________ 43
CHECKING/SERVICING _________________ 43
Security of Air Cleaner System _________ 44
Battery _____________________________ 44
Cleaning the Terminals ________________44
Charging the Battery __________________44
Tire Pressure ________________________ 44
Wheel Nuts Torque ___________________ 44
Sharpen Mower Blades________________ 44
Drive Belts __________________________ 45
Mower Deck Gearbox Oil Seals _________ 45
Spark Plugs _________________________ 46
Breaker Points _______________________ 46
Fuel Lines and Clamps ________________ 46
Blade Brake Action ___________________ 46

Table of Contents
2
REPLACING/REPAIRING ________________ 46
Drive Belts __________________________ 46
Engine/PTO Belt ____________________ 47
Ground Drive Belt ___________________ 48
Fuel Filter ___________________________ 49
Blade Overload Shear Bolts ____________ 49
PTO Shear Pin _______________________ 49
Mower Blades________________________ 50
ADJUSTMENTS ________________________ 51
Transmission Control _________________ 51
Steering Lever Position Adjustment _____ 51
Steering Handles Adjustment __________ 51
Neutral Position Adjustment ___________ 52
Full Forward Speed Adjustment ________ 53
Straight Tracking Adjustment __________ 53
Neutral Switch Adjustment ____________ 54
Forward Speed Control Friction Adjustment 54
Tilt-Up Deck Adjustable Stop ___________ 54
PTO Belt Tension _____________________ 55
PTO Clutch __________________________ 55
Clutch Rod __________________________ 55
ELECTRICAL SYSTEM __________________ 55
Illustrated Parts Manual
TRACTOR DECALS_____________________ 56
BODY / CHASSIS ASSEMBLY ____________ 58
MAIN COMPONENT
POWER TRANSMISSION ________________ 60
ENGINE GROUP _______________________ 62
HYDROSTATIC GROUND
DRIVE ASSEMBLIES____________________ 64
STEERING CONTROL ASSEMBLIES_______ 66
ELECTRICAL ASSEMBLY________________ 68
LIGHT KIT / SPREAD TAIL WHEEL AXLE KIT 70
WIRING SCHEMATIC____________________ 72
Warranty___________________________ 73

General Information
3
HIGHLIGHTED INFORMATION
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.
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.
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:
•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.
•FORWARD SPEED CONTROL (FSC) controls
the maximum forward speed of the tractor;
functioning as a cruise control.
•GROUND DRIVE refers to the dual transaxles
which drive the main wheels.
•TRANSAXLE transmits and controls power
from the ground drive belt to the main drive
wheel.
•LEFT HAND (LH) refers to the left-hand side of
the tractor when the operator is seated facing
forward in the tractor seat.
•POWER TAKE-OFF (PTO) transmits engine
power to run the cutter blades.
•RIGHT HAND (RH) refers to the right-hand side
of the tractor when the operator is seated facing
forward in the tractor seat.
•SIDE DISCHARGE (SD) mows but does not
collect the mowed material.
•STEERING LEVERS steer the tractor by con-
trolling the two transaxles.
•TRACTOR is the prime mover,including the en-
gine, drive train, operator seat, and controls to
operate the mower.
•TRANSAXLE LOCKOUT RODS release the
transaxles to permit freewheeling the tractor.
IDENTIFYING NUMBER LOCATIONS
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 LH side of
the LH 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.
Fill In By Purchaser
Tractor Model No. _______________________
Tractor Serial No. _______________________
Deck Serial No. _______________________
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________