Walker Walker Mowers User manual

OPERATOR’S MANUAL
Safety,Assembly, Operating, and Maintenance Instructions
Model MBS29
Please Read and SaveThese Instructions Beginning S/N: 125598
For Safety, ReadAll Safety and Operation Effective Date: 01-09-12
Instructions Prior to Operating Machine P/N 2000-7

Foreword
Thank you. . .for purchasing a Walker mower. Every effort has been made to provide you with the
most reliable mower on the market, and we are sure you will be among our many satised custom ers.
Iffor anyreasonthisproductdoesnotperformtoyourexpectations,please contactyourlocaldealer.
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 specic engine on the mower model you have purchased. Before you
operateyournewmower,pleaseread this entiremanual. Someoftheinformation is crucialforprop-
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 contact your local authorized dealer or call our
service department, at [phone], for clarication before operating or servicing this mower.
This manual covers Model MBS29 with the Kohler ECH749 (29 HP) Electronic Fuel Injection (EFI)
gasoline engine.
All shields and guards must be in place for the proper and safe operation of this machine.
Where they are shown removed in this manual, it is for illustration purposes only. Do not operate
this machine unless all shields and guards are in place.
Specications given are based on the latest information available at the time this manual was pro-
duced for a tractor with standard equipment. Optional equipment is available and may affect the
standard specications listed.
Walker Mfg. Co. is continually striving to improve the design and performance of its products. We
reserve the right to make changes in specications and design without thereby incurring any obli-
gation relative to previously manufactured products.
Sincerely,
WALKER MANUFACTURING COMPANY
Bob Walker, President

Table of Contents
General Information ________________ 1
HIGHLIGHTED INFORMATION _____________ 1
GLOSSARY ____________________________ 1
IDENTIFYING NUMBER LOCATIONS ________ 1
ENGINE SERIAL NUMBER LOCATION_______ 2
SERVICING OF ENGINEAND
DRIVETRAIN COMPONENTS ______________ 2
Specications________________________ 3
ENGINE________________________________ 3
ELECTRICAL SYSTEM ___________________ 3
TRANSMISSION_________________________ 3
BLADE DRIVE __________________________ 4
TIRE SIZE ______________________________ 4
TIRE PRESSURE ________________________ 4
DIMENSIONS ___________________________ 4
CURB WEIGHT__________________________ 5
DRIVE BELTS___________________________ 5
SEAT__________________________________ 5
FRAME/BODY CONSTRUCTION____________ 5
DECK CHART___________________________ 5
Component Identication ___________ 6
Safety Instructions __________________ 9
BEFORE OPERATING ____________________ 9
OPERATING ___________________________ 11
MAINTENANCE ________________________ 13
SAFETY, CONTROL,AND
INSTRUCTION DECALS _________________ 14
Assembly Instructions______________ 18
SETUP INSTRUCTIONS__________________ 18
Battery Service _______________________ 18
Wet Battery Service __________________ 18
Dry Battery Service___________________ 18
Battery Charging_____________________ 19
Mower DeckAssembly_________________ 19
Deck Caster Wheels Installation_________ 19
Deck Discharge Deector
Shield Installation ____________________ 20
PTO Shaft Guard Installation ___________ 20
Tilt-Up Roller Wheel Installation _________ 20
Mower Deck Installation on Tractor_______ 21
Deck Installation _____________________ 21
Deck Leveling_______________________ 23
PREOPERATING CHECKLIST_____________ 24
Operating Instructions_____________ 26
CONTROL IDENTIFICATION,
LOCATION,AND FUNCTION _____________ 26
Ignition Switch _______________________ 26
Engine Throttle_______________________ 27
Body Latch __________________________ 27
Forward Speed Control (FSC) ___________ 27
Steering Levers_______________________ 28
Blade Clutch (PTO)____________________ 28
Parking Brake ________________________ 28
Oil Pressure Warning Light _____________ 29
Engine Service Light __________________ 29
Over Temperature Warning Light ________ 29
Transaxle Lockout Rods _______________ 30
Hourmeter___________________________ 30
STARTING THE ENGINE _________________ 32
ADJUSTING GROUND
SPEEDAND STEERING__________________ 32
ENGAGING THE BLADE DRIVE ___________ 34
STOPPING THE MACHINE _______________ 35
FUEL SELECTOR VALVE_________________ 36
ADJUSTING CUTTING HEIGHT____________ 36
Transport Position ____________________ 36
TRANSAXLE LOCKOUTS ________________ 37
RECOMMENDATIONS FOR MOWING ______ 37
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT _______________ 39
Maintenance Instructions __________ 40
MAINTENANCE SCHEDULE CHART _______ 40
IMPORTANT TIPS FOR CARE OF THE
KOHLER ENGINE_______________________ 41
Fuel System _________________________ 41
Starting/Stopping_____________________ 41
Cooling System ______________________ 41
Air Cleaner System____________________ 41
Oil__________________________________ 41
LUBRICATION _________________________ 42
Engine Oil ___________________________ 42
Engine Break-In Oil___________________ 42
Checking Engine Crankcase Oil Level ____ 42
Changing Engine Crankcase Oil/Oil Filter__ 42
Mower Deck Spindle Lubrication ________ 44
DRD52 or DSD60 Mower Deck Lubrication_ 44
Transaxle Lubrication _________________ 44
Transaxle Oil and Filter Change _________ 44
Grease Fitting and Oil Point Lubrication __ 45

Table of Contents
CLEANING ____________________________ 48
EngineAir Cleaner System _____________ 48
Turbine Precleaner ___________________ 48
Cummins/Fleetguard OptiAir™Air Cleaner 48
Engine Cooling System ________________ 50
CoolingAir Intake System______________ 50
Cylinder Head Cooling Fins ____________ 50
Grass Buildup in Mower Deck Housing ___ 51
Transaxle Housing ____________________ 53
CHECKING/SERVICING__________________ 54
Security ofAir Filtration Components ____ 54
Battery______________________________ 54
Electrolyte Level _____________________ 54
Cleaning the Terminals ________________ 55
Charging the Battery__________________ 55
Tire Pressure_________________________ 55
Wheel Nut Torque_____________________ 55
Sharpen Mower Blades ________________ 55
Drive Belts___________________________ 56
Spark Plugs__________________________ 56
Ignition Wires ________________________ 56
Fuel Lines and Clamps_________________ 57
PTO U-Joints_________________________ 57
Blade BrakeAction____________________ 57
Safety Switch System__________________ 57
Forward Speed Control Friction Lock_____ 57
REPLACING/REPAIRING_________________ 58
Drive Belts___________________________ 58
Engine/PTO Belt_____________________ 59
Ground Drive Belt ____________________ 60
Fuel Filter ___________________________ 61
Mower Blades ________________________ 61
Replacing Deck Drive Belt ______________ 63
ADJUSTMENTS ________________________ 64
Transmission Control__________________ 64
Steering Lever PositionAdjustment ______ 64
Steering HandlesAdjustment ___________ 64
Neutral PositionAdjustment ____________ 65
Full Forward SpeedAdjustment _________ 66
Straight TrackingAdjustment ___________ 66
FSC Neutral SwitchAdjustment _________ 67
Forward Speed Control
FrictionAdjustment___________________ 67
Blade Clutch (PTO)____________________ 68
Clutch Engagement/Belt Tension ________ 68
Clutch Disengagement/BrakeAction _____ 69
Idler Pulley Maximum TravelAdjustment __ 69
Blade Brake BandAdjustment __________ 70
Warranty___________________________ 71

General Information
1
HIGHLIGHTED INFORMATION
WalkerManufacturingrecommendsthatanyservice
requiringspecialtrainingortoolsbeperformedbyan
authorized Walker Mower dealer. There are several
generalpracticesto beawareofin theareaofsafety.
Most accidents associated with the operation or
maintenance of a Walker Mower are caused by
disregarding basic safety precautions or specic
warnings. Such accidents, in most cases, can be
prevented by being aware of the dangers present.
Information of special importance has been 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 denitions will help while using
this manual:
• DECKisthemowingattachmentmountedonthe
front of the tractor which includes the carrier
frame, deck housing, blade spindles, and cutter
blades.
• ELECTRONICCONTROLUNIT(ECU)controls
engine functions such as spark timing, fuel/air
ratio, etc.
• 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.
• LEFT HAND (LH) refers to the left-hand side of
the tractor when the operator is seated facing
forward in the tractor seat.
• POWER TAKE-OFF (PTO) transmits engine
power to run the cutter blades.
• REAR DISCHARGE (RD) discharges mowed
material from the back of the mower deck.
• RIGHT HAND (RH) refers to the right-hand side
of the tractor when the operator is seated facing
forward in the tractor seat.
• SIDE DISCHARGE (SD) discharges mowed
material from the right side of the mower deck.
• STEERING LEVERS steer the tractor by con-
trolling the two transaxles.
• TRACTOR is the prime mover, including the
engine,drivetrain,operatorseat,andcontrolsto
operate the mower.
• TRANSAXLE transmits and controls power
from the ground drive belt to the main drive
wheel.
• TRANSAXLE LOCKOUT RODS release the
transaxles to permit freewheeling the tractor.
IDENTIFYING NUMBER LOCATIONS
The tractor serial number plate is afxed to the tractor
body just below the left rear corner of the seat. The
mower deck serial number plate is afxed alongside
theangleironframingontheLHsideoftheLHmower
blade drive. Model and serial numbers are helpful
when obtaining replacement parts and maintenance
assistance. Forreadyreference,pleaserecordthese
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 ______________________

General Information
2
Serial Number
Tractor Serial Number Location
Serial Number
Mower Deck Serial Number Location
ENGINE SERIAL NUMBER LOCATION
Refer to the engine manual that accompanies this
manual or the photo below for the location of the en-
gine serial number.
Serial Number
Engine Serial Number Location
SERVICING OF ENGINEAND DRIVETRAIN
COMPONENTS
The detailed servicing and repair of the engine and
transaxle are not covered in this manual. Only rou-
tine maintenance and general service instructions
are provided. For the service of these components
during the limited warranty period, it is important to
nd a local, authorized servicing agent of the com-
ponent manufacturer. Any unauthorized work
done on these components during the warranty
period may void the warranty. If you have any dif-
culty nding an authorized outlet or obtaining
warrantyservice,pleasecontactourServiceDepart-
ment for assistance:
Walker Manufacturing Company
5925 E. Harmony Road
Fort Collins, CO 80528
1-970-221-5614
www.walkermowers.com
Servicemanualsareavailableforeachofthesecom-
ponents from their respective manufacturers as fol-
lows:
Kohler Engines Kohler Company
Kohler, WI 53044
800-544-2444
www.kohlerengines.com
Transaxles Hydro-Gear
1411 South Hamilton St.
Sullivan, IL61951
877-728-7410
http://www.hydro-gear.com

Specications
3
MODEL MBS29
ENGINE
Manufacturer/Model Kohler Command Pro® ECH749, 2 Cyl., OHV, Gasoline
(Air-Cooled), Electronic Fuel Injection (EFI)
Displacement cu. in. (cc) 45.6 (747)
Max Power HP (kW) 29.0 (21.6) @ 3600 RPM
Governed RPM 3600
Max. Torque lb·ft (N·m) 44 (60)
Idle RPM 1200
Spark Plug Type Champion®RC12YC
Spark Plug Gap in. (mm) .030 (0.76)
Crankcase Capacity qt (L) 1.9 (1.8)
Crankcase Lubricant SG/SH/SJ or Higher Grade Oil Only with 10W-30 Viscosity
Above 0° F (-18° C) or 5W-20 or 5W-30 below 32° F (0° C)
Oil Filter Kohler P/N 12 050 01-S
Fuel Tank Capacity gal (L) 9.4 (35.6)
Two Independent 4.7 Gallon Tanks with Selector Valve
Fuel Automotive Grade Unleaded Gasoline (87 Octane) or
Gasohol (Up to 10% Ethyl Alcohol, 90% Unleaded
Gasoline by Volume)
Cooling System Air Cooled
Air Cleaner Remote mounted Cummins/Fleetguard OptiAirTM
(Walker P/N 2090-1 Primary/2090-3 Safety Filter)
ELECTRICAL SYSTEM
Battery 12 Volt (340 CCA)
Charging System Flywheel Alternator
Charging Output 25Amp DC (Regulated)
System Polarity Negative Ground
Ignition Electronic Capacitive Discharge
Starter 12 Volt Electric Ring-Gear Type, Solenoid Operated
Interlock Switches Ignition Lockout by Seat Switch, Transmission Neutral and Blade
Clutch
Circuit Breaker Manual Reset (30A)
TRANSMISSION
Manufacturer/Model Dual, Independent Hydro-Gear®ZT3400 Integrated Transaxles
Steering Hand Lever Control / Individual Wheel
Forward Speed Control Precision Friction Lock Lever, Cruise Control, with Neutral-Park
Position
Service Brake Dynamic Braking through Transaxles
Parking Brake Internal Mechanical Cog Lock for each Transaxle
(Single Lever Control)
Neutral Transmission Release by Manual Dump Valve
Final Drive Direct Drive Axle from Transaxle

Specications
4
MODEL MBS29
TRANSMISSION (continued)
Transmission Fluid
Factory Service 20W-50 Multi-Viscosity Motor Oil (Minimum SL Grade Oil)
Transmission Oil Capacity qt (L) 2.4 (2.3)
Transmission Cooling Cooling Fan Mounted on Drive Pulley
Oil Filter Hydro-Gear®P/N 52114 (Walker P/N 2026-6)
Ground Travel Speed
Forward MPH (km/h)
Reverse MPH (km/h) 0-10 (0-16) Innitely Variable 0-5 (0-8) Innitely Variable
BLADE DRIVE
PTO Shaft Sliding Spline Shaft with Two (2) High-Speed U-Joints
Blade Spindle Each Blade (3) Mounts Directly on Belt Driven Spindles
Blade Drive Clutch and Brake Manual Belt Tightener Clutch and Band Brake
[Stops Blades within Five (5) Seconds of Disengagement]
TIRE SIZE
Deck Caster Wheel 13 x 5.00-6 Pneumatic (4-Ply)
Drive 22 x 10.50-12 (4-Ply Low-Prole)
Rear 13 x 5.00-6 (4-Ply)
TIRE PRESSURE PSI (KPA)
Deck Caster Wheel 20 (137)
Drive 15 (103)
Rear 20 (137)
DIMENSIONS (Tractor and Mower)
Length in. (cm) 100-1/4 (255)
Tractor Only 68-1/2 (174)
Wheel Base (Tractor) 42-5/8 (109)
With DRD52 105-1/2 (267)
With DSD60 107 (272)
Tractor w/Tilted Deck 83-1/2 (212)
Width in. (cm)
With DRD52 54-1/4 (138)
With DSD60 (Deector Up) 62 (158)
Tread Width 36-1/2 (93)
Height in. (cm) 47-1/2 (121)
Standard Tractor 46-3/4 (119)

Specications
5
MODEL MBS29
CURB WEIGHT lb (kg)
Tractor Only 745 (338)
Tractor with DRD52 Deck 1188 (539)
Tractor with DSD60 Deck 1280 (581)
DRIVE BELTS
Engine PTO Walker P/N 2230
Ground Drive Walker P/N 2248
SEAT Contour-Molded, with Nylon Backed Vinyl Cover and
Integral Foam Cushion (Suspension)
FRAME/BODY CONSTRUCTION
Frame/Body 3/16 Plate Steel/14 Gauge Sheet Steel
Deck 11 Gauge Steel
DECK DRD52 DSD60
Type Belt Driven, Rear Discharge Belt Driven, Side Discharge
Cutting Width in. (cm) 52 (132) 60 (152)
Cutting Height in. (cm) 1 to 5 (3 to 13)
Height Adjustment in. (cm) 1/4 (1) Increments, 17 Positions
Blade Length in. (cm) 18.4 (47) 20.5 (52)
Number of Blades 3
Direction of Rotation
(Viewed from top of deck) Clockwise
Deck Suspension Torsion-Flex Frame with Caster Wheels and Counterweight Springs
Maximum Blade RPM 3840 3330
Maximum Blade Tip Speed
ft/min (m/min) 18500 (5640) 17870 (5460)
NOTE: The manufacturer reserves the right to make changes in specications shown herein at any time
without notice or obligation. The specications listed are for a standard conguration tractor, and may
change with the addition of optional equipment.

Component Identication
6
Front View and Right Side View
NOTE: Control Identication
shown in Operating
Instructions section.
Deck
Discharge Shield
Deck
Caster Wheels
Tilt Bar
Deck Handle
Footrests
Counterweight Springs and
Protective Covers
Tilt-Up Latch
Forward Speed
Control (FSC)
Friction
Adjustment
Deck Height
Lift Chain Tilt-Up Hook
(Not Visible)
Deck Height
AdjustmentTrigger
HeightAdjustmentArm
(Cutting HeightAdjustment)
Deck SupportArm
(Not Visible)
Deck SupportArm
(Not Visible)
Body Lift
Handle BodyTilt-Up Latch