Walker MS User manual

OPERATOR’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MS
™
Please Read and Save These Instructions Beginning S/N: 117172
For Safety, Read All Safety and Operation Effective Date: 05-07-12
Instructions Prior to Operating Machine P/N 5000-23

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. If for any reason this product does not perform to your expectations, please contact your local
dealer. 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 operate your new mower, please read this entire manual. Some of the information is crucial for
proper 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 any-
thing 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 MS with the Subaru Robin, EX40 (14 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.
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 obliga-
tion 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 ENGINE AND
DRIVETRAIN COMPONENTS ______________ 2
Specications________________________ 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
DRIVE BELTS ___________________________ 5
GHS SYSTEM___________________________ 6
SEAT __________________________________ 6
FRAME/BODY CONSTRUCTION ___________ 6
Component Identication ___________ 7
Safety Instructions _________________ 10
BEFORE OPERATING ___________________ 10
OPERATING ___________________________ 12
MAINTENANCE ________________________ 14
SAFETY, CONTROL, AND
INSTRUCTION DECALS _________________ 15
Assembly Instructions______________ 17
SETUP INSTRUCTIONS__________________ 17
Tire Installation (Tractor) _______________ 17
Battery Service _______________________ 17
Wet Battery Service __________________ 17
Dry Battery Service___________________ 17
Battery Charging_____________________ 18
Battery Installation ___________________ 18
Mower Deck Assembly_________________ 18
Deck Caster Wheels Installation _________ 18
Deck Discharge Chute Installation _______ 19
Deck Discharge Deector
Shield Installation ____________________ 19
PTO Shaft Guard Installation ___________ 19
Tilt-Up Roller Wheel Installation _________ 19
Mower Deck Installation on Tractor_______ 20
Deck Installation _____________________ 20
Deck Leveling _______________________ 22
PREOPERATING CHECKLIST_____________ 23
Operating Instructions _____________ 25
CONTROL IDENTIFICATION,
LOCATION, AND FUNCTION _____________ 25
Ignition Switch _______________________ 25
Engine Choke ________________________ 25
Engine Throttle _______________________ 26
Forward Speed Control (FSC) ___________ 26
Steering Levers_______________________ 26
Blade Clutch (PTO)____________________ 26
Parking Brake ________________________ 26
Transmission Lockout Levers ___________ 27
Hourmeter ___________________________ 27
Light Switch (For Optional Lights) _______ 27
STARTING THE ENGINE _________________ 29
ADJUSTING GROUND
SPEED AND STEERING__________________ 29
ENGAGING THE BLADE DRIVE ___________ 31
STOPPING THE MACHINE _______________ 32
ADJUSTING CUTTING HEIGHT____________ 32
TRANSMISSION LOCKOUT ______________ 33
RECOMMENDATIONS FOR MOWING ______ 33
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT _______________ 35
GRASS HANDLING SYSTEM (GHS) ________ 36
General Information ___________________ 37
Clogging Checklist____________________ 38
Using the Tilt-Up Deck _________________ 39
Using the GHS Catcher ________________ 39
Powerl ®__________________________ 39
“Full” Signal Horn ____________________ 39
Cleaning the GHS Exhaust Screen _______ 39
Dumping the Catcher __________________ 40
Tailgate Dumping ____________________ 40
Using the Dump Bag__________________ 40

Table of Contents
Maintenance Instructions __________ 42
MAINTENANCE SCHEDULE CHART _______ 42
IMPORTANT TIPS FOR CARE
OF THE SUBARU ENGINE________________ 43
Fuel System _________________________ 43
Starting _____________________________ 43
Cooling System ______________________ 43
Air Cleaner System____________________ 43
Oil__________________________________ 43
LUBRICATION _________________________ 44
Engine Oil ___________________________ 44
Engine Break-In Oil___________________ 44
Checking Engine Crankcase Oil Level ____ 44
Changing Engine Crankcase Oil_________ 45
Grease Fitting and Oil Point Lubrication __ 45
Mower Deck Gearbox Lubrication________ 48
Tractor PTO Gearbox Lubrication ________ 48
Gear Axle Lubrication _________________ 49
Hydrostatic Transmission Fluid _________ 49
Checking Hydrostatic
Transmission Fluid Level ______________ 49
CLEANING ____________________________ 50
Engine Air Cleaner System _____________ 50
Donaldson Radialseal™ Air Cleaner______ 50
Fuel Filter ___________________________ 52
Engine Cooling System ________________ 53
Cooling Air Intake System ______________ 53
Cylinder Head Cooling Fins ____________ 53
Grass Buildup in Mower Deck Housing ___ 54
GHS Blower__________________________ 55
GHS Exhaust Screen __________________ 55
Hydrostatic Transmission Cooling Fins ___ 56
CHECKING/SERVICING__________________ 56
Security of Air Filtration Components ____ 56
Battery______________________________ 56
Electrolyte Level _____________________ 56
Cleaning the Terminals ________________ 57
Charging the Battery__________________ 57
Tire Pressure_________________________ 57
Sharpen Mower Blades ________________ 57
Drive Belts___________________________ 59
Mower Deck Gearbox Oil Seals __________ 59
Spark Plug___________________________ 59
Breaker Points _______________________ 59
Fuel Lines and Clamps_________________ 59
Blade Brake Action____________________ 59
Safety Switch System__________________ 60
Forward Speed Control Friction Lock_____ 60
REPLACING/REPAIRING_________________ 61
Drive Belts___________________________ 61
Engine Belt _________________________ 62
PTO Drive Belt ______________________ 63
Ground Drive Belt ____________________ 64
Blade Overload Shear Bolts_____________ 65
PTO Shear Pin (If Equipped) ____________ 65
Mower Blades ________________________ 66
ADJUSTMENTS ________________________ 67
Steering Levers_______________________ 67
Tilt-Up Deck Adjustable Stop____________ 67
GHS Signal Horn Adjustment
(When Horn Sounds at Wrong Time)______ 67
Operator’s Notes _______________ 69
Warranty _____________________ 71

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 opera-
tion 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 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) 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.
•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.
•GROUND DRIVE refers to the dual hydrostatic
transmissions which drive the main wheels.
•HYDROSTATIC TRANSMISSION 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 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.
•SIDE DISCHARGE (SD) discharges mowed
material from the right side of the mower deck.
•STEERING LEVERS steer the tractor by con-
trolling the dual hydrostatic transmissions.
•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.
IDENTIFYING NUMBER LOCATIONS
The tractor serial number plate is afxed to the trac-
tor body just below the left rear corner of the seat.
The mower deck serial number plate is afxed
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 ______________________

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
engine serial number.
Serial Number
Engine Serial Number Location
(View From Right Side of Tractor)
SERVICING OF ENGINE AND DRIVETRAIN
COMPONENTS
The detailed servicing and repair of the engine,
hydrostatic transmission and gearboxes are not
covered in this manual. Only routine 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, au-
thorized servicing agent of the component manu-
facturer. 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 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
www.walkermowers.com
Service manuals are available for each of these
components from their respective manufacturers as
follows:
Subaru Engine Subaru Robin America Inc.
A division of Fuji
Industries, Ltd. Group
905 Telser Rd.
Lake Zurich, IL 60047
800-277-6246
http://www.subarupower.com/
Hydrostatic Eaton Fluid Power Group
Transmissions Hydraulics Business USA
14615 Lone Oak Road
Eden Prairie, MN 55344 USA
952-937-9800
www.eaton.com/hydraulics
Gearboxes (Deck) Peerless Gear
1555 South Jackson St.
Salem, IN 47167 USA
866-536-8310
www.peerlessgear.com

Specications
3
MODEL MS
ENGINE
Manufacturer/Model Subaru Robin, EX40, 1 Cyl. (Air-Cooled)
Displacement cu. in. (cc) 24.65 (404)
Max. Power HP (kW) 14.0 (10.4) @ 3600 RPM
Governed RPM 3600
Max. Torque lb·ft (N·m) 19.9 (27.0) @ 2400 RPM
Idle RPM 1300
Spark Plug Type NGK BPR5ES
Spark Plug Gap in. (mm) .030 (0.75)
Crankcase Capacity qt (L) 1.35 (1.3)
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 gal (L) 1.9 (7.2)
Fuel Automotive Grade Unleaded Gasoline (87 Octane)
Cooling System Air Cooled
Air Cleaner Remote mounted Donaldson RadialsealTM
(Walker P/N 5090-1 Primary/5090-3 Safety Filter)
ELECTRICAL SYSTEM
Battery 12 Volt, 300 CCA (Interstate SP-35)
Charging System Flywheel Alternator
Charging Output 13 Amp DC (Regulated)
System Polarity Negative Ground
Ignition Transistorized Electronic Magneto
Starter 12 Volt Electric Key and Solenoid Operated
Interlock Switches Ignition Lockout by Seat Switch, Transmission Neutral and Blade
Clutch
Circuit Breaker Replaceable Fuse (20A)
TRANSMISSION
Manufacturer/Model Dual Hydrostatic, Eaton Model 7, Each Wheel Independently Driven
Steering Hand Lever Control / Individual Wheel
Forward Speed Control Precision Friction Lock Lever, Cruise Control, with Neutral-Park
Position
Service Brake Dynamic Braking through Hydrostatic Transmission
Parking Brake Mechanical Pin Lock in Transmission Gear
Neutral Transmission Release by Manual Dump Valve
Final Drive Gear Drive Axle

Specications
4
MODEL MS
TRANSMISSION (continued)
Transmission Fluid
Factory Service Mobil 1 Synthetic Motor Oil (15W-50)
Transmission Oil Capacity oz. (L) 19 (.56)
Transmission Cooling Cooling Fan Mounted on Drive Pulley
Ground Travel Speed
Forward MPH (km/h)
Reverse MPH (km/h)
0-5 (0-8) 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 (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 Scrubber Brake
[Stops Blades within Five (5) Seconds of Disengagement]
Max. Blade Speed
[22 in. (56 cm) Blade] @ 3600
RPM Engine
2900 RPM
[16700 FPM (5090 m/min)]
TIRE SIZE
Deck Caster Wheel 8 x 3.00-4 Pneumatic (4-Ply)
Drive 18 x 6.50-8 (4-Ply)
Drive (Optional Wide Tire) 18 x 8.50-8 (4-Ply)
Rear 13 x 6.50-6 (4-Ply)
TIRE PRESSURE PSI (KPA)
Deck Caster Wheel 20 (137)
Drive 15 (103)
Rear 20 (137)
DIMENSIONS (Tractor and Mower)
Length in. (cm)
Tractor Only 64.5 (164)
Tractor Wheel Base 42.25 (107)
With 36 in. (91 cm) 87 (221)
With 42 in. (107 cm) 89 (226)

Specications
5
MODEL MS
DIMENSIONS (continued)
Width in. (cm)
Tractor Only
(Outside Standard Tire) 35 (89)
(Outside Optional Wide Tire) 37.75 (96)
With 36 in. (91 cm) 37 (94)
With 42 in. (107 cm) 43 (109)
Height in. (cm)
Tractor 44.5 (113)
Weight lb (kg)
Tractor Only 639 (290)
With DGHS36 715 (324)
With DGHS42 832 (377)
MOWER DECK
Width of Cut SD/GHS 36 or 42 in. (91 or 107 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
36 in. (91 cm) GHS Model 20 in. (51 cm) Two (2) Counter-Rotating Blades with a 4 in.
(10 cm) Center Overlap
42 in. (107 cm) GHS Model 22 in. (56 cm) Two (2) Counter-Rotating Blades with a 2 in.
(5 cm) Center Overlap
Deck Suspension Torsion-Flex Frame with Caster Wheels and
Counterweight Springs
DRIVE BELTS
Engine Walker P/N 5230-2
Ground Drive Walker P/N 5232
PTO Drive Walker P/N 5234-2

Specications
6
MODEL MS
GHS SYSTEM
Blower 10 in. Diameter, Three-Blade Paddle Wheel
Blower Brake Belt Scrubber Brake [Works in Combination with PTO Clutch, Stops
Blower within Five (5) Seconds of PTO Disengagement]
Max. Blower RPM 4000
Grass Catcher Capacity
gal / bu / L 63 / 6.7 / 238
Full Signal Oscillating Vane Switch Mounted on Grass Delivery Spout Triggers
Horn Signal
Powerl ®
Oscillating Delivery Spout Driven by 12 Volt Electric Gearmotor
Spreads Material throughout Interior of Catcher @ 25 Cycles/
Minute
SEAT Contour-Molded, with Nylon Backed Vinyl Cover and Integral
Foam Cushion
FRAME/BODY CONSTRUCTION
Frame All Welded Unitized Steel Chassis
Body 14 Gauge Steel
Deck 11 Gauge Steel
GHS Catcher and Chutes Molded Cross-Linked Polyethylene (UV Stabilized)
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.