Walker 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 Effective Date: 11-01-03
For Safety, Read All Safety and Operation P/N 9001
Instructions Prior to Operating Machine Price $5.00
™

Foreword
Thank you. . .for purchasing a Walker by Walker (Model MW). Every effort has been made to pro-
vide you with the most reliable product on the market, and we are sure you will be among our many
satisfied customers. If for any reason this product does not perform to your expectations, please
contact an authorized servicing dealer or Walker Manufacturing at [phone]. 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 specific engine on the mower model you are using. Before you op-
erate your new mower, please read this entire manual. Some of the information is crucial for proper
operation and maintenance of this product - it will help protect your investment and ensure that the
tractor 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 product.
This manual covers the Model MW Walk-Behind (15-HP) mower.
All shields and guards must be in place for the proper and safe operation of this mower.
Where they are shown removed in this manual, it is for illustration purposes only. Do not operate
this product unless all shields and guards are in place.
Specifications given are based on the latest information available at the time this manual was pro-
duced.
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
Owner’s Manual
General Information ________________ 1
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
Component Identification___________ 6
Safety Instructions __________________ 9
BEFORE OPERATING____________________ 9
OPERATING___________________________ 10
MAINTENANCE ________________________ 11
SAFETY, CONTROL,
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
Operating Instructions_____________ 21
CONTROL IDENTIFICATION,
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
TILT-UP DECK OPERATION/TRANSPORT__ 28
Maintenance Instructions__________ 28
IMPORTANT TIPS FOR CARE OF THE
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
PTO Linkage Lubrication ______________ 33

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
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
Maintenance And Service
Record Sheet_______________________ 61
Operator’s Notes___________________ 62
Warranty___________________________ 63

General Information
1
HIGHLIGHTED INFORMATION
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.
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 us-
ing 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)
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.
•LEFT HAND (LH) refers to the left-hand side of
the tractor when the operator is seated facing
forward from the operator position.
•NEUTRAL LOCKOUT releases the hydrostatic
transaxles to permit freewheeling the tractor.
•PISTOL GRIPS steer the tractor by controlling
the dual hydrostatic transaxles.
•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.
•SIDE DISCHARGE (SD) mows but does not
collect the mowed material.
•TRACTOR is theprimemover,including theen-
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 andserialnumbers
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 Serial Number Location
(Top View of Tractor)
Serial
Number Plate
Ref. Engine
Air Cleaner
Ref. RH
Drive Wheel
Tractor Model No. _______________________
Tractor Serial No. _______________________
Deck Serial No. _______________________
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________

2
General Information
Deck Serial Number Location
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 themowermodel coveredby thismanual, anen-
gine manual is available to cover the Kawasaki
FH430V.
Engine Serial Number Location
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:
Walker Manufacturing Company
5925 E. Harmony Road
Fort Collins, CO 80528
1-970-221-5614
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 Tecumseh Products Co.
(Deck & PTO) 900 North Street
Grafton, Wl 53024
Serial Number
Serial Number

Specifications
3
MODEL MW
ENGINE
Manufacturer/Model Kawasaki, FH430V, OHV, 2 Cyl. V-Twin (Air-Cooled)
Displacement 431CC (26.3 cu. in.)
HP (@ 3600 RPM) 15
Max. RPM (No Load) 4000
Governed RPM 3600
Max. Torque [ft-lb (N⋅m) @ RPM] 23.6 (32 N•m) @ 2400
Idle RPM 1500
Spark Plug Type Champion®RCJ8Y
Spark Plug Gap .030 in. (.75 mm)
Crankcase Capacity 1.8 qts (1.7 liters)
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 3 Gallons (11.4 liters)
Fuel Automotive Grade Unleaded Gasoline (87 Octane)
ELECTRICAL SYSTEM
Battery 12-Volt, Interstate PC1250
Charging System 12.5 Amp Alternator
Charging Output 15 Amp DC (Regulated)
System Polarity Negative Ground
Ignition Electronic Magneto
Starter Recoil Starter
Interlock Switch Ignition Lockout by Operator Presence Lever, Transmission Neutral
and Blade Clutch
TRANSMISSION
Manufacturer/Model Dual, Independent Hydro-Gear Integrated Transaxles
Steering Handle Pistol Grips
Forward Speed Control Variable Speed Controlled by Rocker Switch Near RH Thumb, with
Neutral Park Setting
Service Brake Mechanical Lockout for each Transmission (Single Lever Control)
Neutral Transmission Release by Manual Dump Valve

Specifications
4
MODEL MW
TRANSMISSION (continued)
Transmission Fluid
Factory Service 20W50 Multi-Viscosity Motor Oil
Transmission Fluid Capacity 79 fl. oz. (2336 ml.)
Transmission Cooling Cooling Fan Mounted on Drive Pulley
Ground Travel Speed
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)
Deck Caster Wheel (Optional) 8.25 x 2.75 Foamed Rubber
Drive 18 x 8.50-10 (Low-Profile)
Rear 2.80/2.50-4 Pneumatic (4-Ply)
Rear Wheel (Optional) 8.25 x 2.75 Foamed Rubber
TIRE PRESSURE
Deck Caster Wheel 20 PSI (137 kPa)
Drive 15 PSI (103 kPa)
Rear 20 PSI (137 kPa)
DIMENSIONS (Tractor and Mower)
Length 80 in. (203 cm)
Width 48-3/4 in. (124 cm)
Height 44-3/4 in. (114 cm)
Wheel Base (Tractor) 22 in. (56 cm)
Tread Width (Tractor) 29-1/4 in. (74 cm)

Specifications
5
MODEL MW
MOWER DECK
Width of Cut 36-, 42-, 48-, 52-, or 56-in.(91, 107, 122, 132, or 142 cm)
Cutting Height 1 to 4 in. (3 to 10 cm)
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)
Tractor and Deck 520 lb (236 kg)
* Dimensions and weight shown are for 48 in. (122 cm) SD Deck (Typical)
DRIVE BELTS
Engine PTO Walker P/N 9230
Ground Drive Walker P/N 9248
FRAME/BODY CONSTRUCTION
Frame/Body 3/16 Plate Steel
Deck 11 Gauge Steel
NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time
without notice or obligation.

Component Identification
6
Front View and Right Side View
NOTE: Control Identification
shown in Operating
Instructions section.
Engine
Cover
Counterweight Spring
and Protective Cover
Tilt-Up
Latch
Engine
Cover Latch
Throttle/Choke
Control & Cable
Fuel Tank
and Cap
Parking
Brake Handle
Fuel Filter
Tail Wheel
Right Hand
Drive Wheel
Spring Clip
Discharge Shield
Deck Support
Arms Tilt-Up
Hook
Deck Lift Handle
(Cutting Height Adjustment)
Deck
Caster Wheels
Tilt-Up
Handle
Footrests
Deck Support Pins
and Height Adjustment
Hitch Pins