Walker MBSSD 27 HP User Manual
OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
and ILLUSTRATED PARTS MANUAL
Model MBSSD (27 HP)
™
Please Read and Save These Instructions Effective Date: 03-31-08
For Safety, Read All Safety and Operation P/N 2000-1
Instructions Prior to Operating Machine
Foreword
Thank you. . .for purchasing a Walker mower. Eve ry ef for t has been made to provid e you with th e
most reliable mower 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 cont act 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 specific 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 import ant to yo ur safety, and must
be read and understood to help prevent possible injury to th e oper ator or ot hers. If anything in this
manual is confusing or hard to understand, please call our service departmen t, at (970) 221-5614,
for clarification before operating or servicing this mower.
This manual covers Model MBSSD with the Kohler Command CH740 (27 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 a nd design without thereby incurrin g any obligation 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 ENGINE AND
DRIVETRAIN COMPONENTS ______________ 2
Specifications _______________________ 3 Component Identification___________ 6 Safety Instructions __________________ 9
BEFORE OPERATING____________________ 9
OPERATING___________________________ 10
MAINTENANCE ________________________ 12
SAFETY, CONTROL, AND
INSTRUCTION DECALS _________________ 13
Assembly Instructions _____________ 15
SETUP INSTRUCTIONS _________________ 15
Battery Service_______________________ 15
Wet Battery Service __________________ 15
Dry Battery Service __________________ 15
Battery Charging ____________________ 16
Mower Deck Assembly ________________ 16
Deck Caster Wheels Installation ________ 16
Deck Discharge Shield Installation ______ 16
PTO Shaft Guard Installation __________ 17
Tilt-Up Roller Wheel Installation ________ 17
Mower Deck Installation on Tractor ______ 17
Deck Installation ____________________ 17
Deck Leveling ______________________ 19
PREOPERATING CHECKLIST ____________ 20
Operating Instructions_____________ 22
STARTING THE ENGINE_________________ 26
ADJUSTING GROUND
SPEED AND STEERING _________________ 26
ENGAGING THE MOWER________________ 28
STOPPING THE MACHINE _______________ 29
FUEL SELECTOR VALVE________________ 29
ADJUSTING CUTTING HEIGHT ___________ 30
Transport Position____________________ 30
TRANSAXLE LOCKOUTS________________ 31
RECOMMENDATIONS FOR MOWING ______ 31
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT_______________ 32
Maintenance Instructions___________33
MAINTENANCE SCHEDULE CHART_______ 33
IMPORTANT TIPS FOR CARE OF THE
KOHLER ENGINE ______________________ 34
Fuel System _________________________ 34
Starting/Stopping ____________________ 34
Cooling System ______________________ 34
Air Cleaner System ___________________ 34
Oil _________________________________ 34
LUBRICATION_________________________ 35
Engine Oil___________________________ 35
Engine Break-In Oil ___________________35
Checking Engine Crankcase Oil Level ____35
Changing Engine Crankcase Oil/Oil Filter _35
Mower Deck Spindle Lubrication________ 37
DSD60 Mower Deck Lubrication ________ 37
Transaxle Lubrication_________________ 37
Grease Fitting and Oil Point Lubrication__ 37
Transaxle Oil and Filter Change_________ 40
CLEANING____________________________ 41
Engine Air Cleaner System_____________ 41
Cummins/Fleetguard OptiAir™
Air Cleaner _________________________41
Engine Cooling System _______________ 43
Air Intake System ____________________43
Cylinder Head Cooling Fins ____________43
Grass Buildup in Mower Housing _______ 44
Transaxle Cooling Fins________________ 46
CONTROL IDENTIFICATION,
LOCATION, AND FUNCTION _____________ 22
Ignition Switch _______________________ 22
Engine Choke ________________________ 23
Engine Throttle_______________________ 23
Forward Speed Control (FSC)___________ 23
Steering Levers ______________________ 23
Blade Clutch (PTO) ___________________ 23
Parking Brake________________________ 24
Transaxle Lockout Rods _______________ 24
Hourmeter___________________________ 24
Table of Contents
CHECKING/SERVICING _________________ 47
Security of Air Filtration Components ____ 47
Battery______________________________ 47
Cleaning the Terminals _______________ 47
Charging the Battery _________________ 47
Tire Pressure ________________________ 47
Wheel Nuts Torque ___________________ 47
Sharpen Mower Blades ________________ 47
Drive Belts __________________________ 49
Spark Plugs _________________________ 49
Fuel Lines and Clamps ________________ 49
Blade Brake Action ___________________ 49
REPLACING/REPAIRING ________________ 49
Drive Belts __________________________ 49
Engine/PTO Belt ____________________ 50
Ground Drive Belt ___________________ 51
Fuel Filter ___________________________ 52
Mower Blades________________________ 52
ADJUSTMENTS ________________________ 53
Transmission Control _________________ 53
Steering Lever Position Adjustment _____ 53
Steering Handles Adjustment __________ 54
Neutral Position Adjustment ___________ 54
Full Forward Speed Adjustment ________ 55
Straight Tracking Adjustment __________ 55
FSC Switch - Neutral Adjustment _______ 56
Forward Speed Control
Friction Adjustment___________________ 56
PTO Belt Tension_____________________ 56
PTO Clutch __________________________ 57
Clutch Rod __________________________ 57
ELECTRICAL SYSTEM __________________ 57
Illustrated Parts Manual
TRACTOR AND DECK DECALS___________ 58
BODY / CHASSIS ASSEMBLY ____________ 60
MAIN COMPONENT
POWER TRANSMISSION ________________ 62
ENGINE GROUP _______________________ 64
HYDROSTATIC GROUND
DRIVE ASSEMBLIES____________________ 66
STEERING CONTROL ASSEMBLIES_______ 68
ELECTRICAL ASSEMBLY________________ 70
60 INCH COMPLETE CARRIER
FRAME ASSEMBLY_____________________ 72
DSD60 DECK ASSEMBLY________________ 74
MULCH KIT____________________________ 76
WIRING SCHEMATIC____________________ 78
Warranty___________________________ 79
General Information
HIGHLIGHTED INFORMATION
Walker Manufacturing recommends that any service 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 operation 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 highlighted in bold type in this manual. Refer to Safety
Instructions for the meanings of DANGER, WARNING, CAUTION, IMPORTANT, and NOTE.
GLOSSARY
There are many terms that are either unique to this
equipment or that are used as acronyms. The following terms and their definitions will help while
using this manual:
• DECK is the mowing attachment moun ted on
the front of the tractor which includes the carrier
frame, deck housing, blade spindles, and cutter
blades.
• TRACTOR is the prime mover , including the en-
gine, drive train, operator seat, and controls to
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 affixed to the
tractor 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
numbers are helpful when obtaining replacement
parts and maintenance assistance. For ready
reference, please record these numbers in the
space provided.
Tractor Model No. _______________________
Tractor Serial No. _______________________
Deck Serial No. _______________________
• FORW ARD 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.
• RIGHT HAND (RH) refers to the right-hand side
of the tractor when the operator is seated fa cing
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.
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________
Fill In By Purchaser
1
General Information
Serial Number
Tractor Serial Number Location
Serial Number
Engine Serial Number Location
Serial Number
Mower Deck Serial Number Location
ENGINE SERIAL NUMBER LOCATION
Refer to the engine manual th at accompanies this
manual for the location of the engine serial number.
For the mower model covered by this manual, an
engine manual is available from Kohler covering the
Kohler Command CH740 engine.
SERVICING OF ENGINE AND DRIVETRAIN COMPONENTS
The detailed servicing and repair of the engine and
transaxle 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
find a local, authorized servicing agent of the component manufacturer. Any unauthorized work
done on these components during the warranty
period may void the warranty. If you have any dif-
ficulty finding an authorized outlet or obtaining
warranty service, please contact our Service Department for assistance:
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 ma nufacturers as
follows:
Kohler Engines Kohler Company
Kohler, WI 53044
800-544-2444
www.kohlerengines.com
Transaxles Hydro-Gear
1411 South Hamilton St.
Sullivan, IL 61951
2
Specifications
MODEL MBSSD
ENGINE
Manufacturer/Model Kohler Command CH740, 2 Cyl. OHV (Air-Cooled)
Displacement 44.0 cu. in. (725 cc)
HP (@ 3600 RPM) 27.0
Max. RPM (No Load) 3600 ± 100
Governed RPM 3600 ± 100
Max. Torque [ft-lb (N
Idle RPM 1200 ± 75
Spark Plug Type Champion RC14YC
Spark Plug Gap .030 in. (0.76 mm)
Crankcase Capacity 1.9 qts (1.8 liters)
Crankcase Lubricant SG/SH/SJ or Higher Grade Oil Only with 10W-30 Viscosity
Oil Filter 12 050 01 5 (2-1/2)
Fuel Tank Capacity 10 Gallons (38 liters)
Fuel Automotive Grade Unleaded Gasoline (87 Octane) or Ga sohol
Cooling System Air Cooled
ELECTRICAL SYSTEM
Battery 12 Volt (340 CCA)
Charging System 15 Amp Alternator
Charging Output 15 Amp DC (Regulated)
·m) @ RPM] 42.7 (57.9) @ 3000
Above 0° F (-18° C) or 5W20 or 5W30 below 32° F (0° C)
Two In dependent Five (5) Gallon Tanks with Selector Valve
(Up to 10% Ethyl Alcohol, 90% Unleaded Gasoline by Volume)
System Polarity Negative Ground
Ignition Electronic Capacitive Discharge
Starter 12 Volt Electric Key an d Solenoid Operated
Interlock Switch Ignition Lockout by Seat Switch, Transmission Neutral and Blade Clutch
Circuit Breaker Manual Reset (30A)
TRANSMISSION
Manufacturer/Model Dual, Independent Hydro-Gear Integrated Transaxles
Steering Hand Lever Control / Individual Wheel
Forward Speed Control Precision Friction Lock Lever, Cruise Control, with Neutral-Park
Position
3
Specifications
MODEL MBSSD
TRANSMISSION (continued)
Service Brake Dynamic Braking through Transaxles
Parking Brake (Internal) Mechanical Lockout for each Transaxle
Neutral Transmission Release by Manual Dump Valve
Final Drive Direct Drive Axle from Transaxle
Transmission Fluid
Factory Service 20W-50 Multi-Viscosity Motor Oil (Minimum SL Grade 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)
BLADE DRIVE
(Single Lever Control)
0-9 (0-14) Infinitely Variable
0-5 (0-8) Infinitely Variable
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 Mechanical Clutch with Internal Brake
[Stops Blades within Five (5) Seconds of Disengagement]
Max. Blade Speed
[20-1/2 in. (52 cm) Blade] @
3600 RPM Engine
TIRE SIZE
Deck Caster Wheel 13 x 5.00-6 Pneumatic (4-Ply)
Drive 22 x 10.50-12 (4-Ply Low-Profile)
Rear 13 x 5.00-6 (4-Ply)
TIRE PRESSURE
Deck Caster Wheel 20 PSI (137 kPa)
Drive 15 PSI (103 kPa)
Rear
DIMENSIONS (Tractor and Mower)
Length
Width
60 in. (152 cm) SD Model
(with Deflector)
Height 43-1/4 in. (110 cm)
Wheel Base (Tractor) 42-5/8 in. (109 cm)
Tread Width (Tractor) 36-1/2 in. (93 cm)
3200 RPM
[18300 FPM (5578 m/min)]
20 PSI (137 kPa)
100-1/4 in. (255 cm)
62 in. (158 cm)
4
Specifications
MODEL MBSSD
MOWER DECK
Width of Cut 60 in. (152 cm)
Cutting Height 1 to 5 in. (3 to 13 cm)
Height Adjustment 17 Positions - 1/4 in. (1 cm) Increments
Blade Size
60 in. (152 cm) SD Model 20-1/2 in. (52 cm) Three (3) Clockwise-Rotating Blades
Deck Suspension Torsion-Flex Frame with Caster Wheels and
CURB WEIGHT (Approximate)
Tractor Only 730 lb (331 kg)
SD Tractor and 60 in. SD Deck 1110 lb (503 kg)
DRIVE BELTS
Engine PTO Walker P/N 2230
Ground Drive Walker P/N 2248
Counterweight Springs
SEAT
FRAME/BODY CONSTRUCTION
Frame/Body 3/16 Plate Steel/14 Gauge Sheet Steel
Deck 11 Gauge Steel
Contour-Molded, with Nylon Backed Vinyl Cover and Integral
Foam Cushion (Suspension)
NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time
without notice or obligation.
5
Component Identification
Body Lift
Handle
Forward Speed
Control (FSC)
Friction
Adjustment
NOTE: Control Identification
shown in Operating
Instructions section.
Tilt-Up Latch
Counterweight Spring and
Protective Cover
Deck Support
Arm
Footrests
Tilt Bar
Deck Handle
Deck Height
Adjustment Trigger
Deck Support Arm
Height Adjustment Arm
(Cutting Height Adjustment)
Discharge Shield
Deck
Deck Height
Lift Chain
Tilt-Up Hook
(not visible)
Deck
Caster Wheels
Front View and Right Side View
6
Component Identification
Footrests
Footrest Catch
Assembly
Left Hand
Drive Wheel
Fuel Pickup
Line
Fuel Tank
and Cap
Tailpipe
Muffler
Spread
Tail Wheel
Battery
(not visible)
Rear View and Left Side View
7
Component Identification
LH Transmission
Control Arm
Steerin g Levers
Dampeners
RH Transmission
Control Arm
LH Transaxle
Expansion
Reservoir
LH Transaxle
LH Transaxle
Lockout Rod
Parking Brake
Cummins/Fleetguard
OptiAir™ Air Cleaner
Air Filter
Cover
Fuel Pickup Line
Fuel Tank
Fuel Tank Cap
RH Transaxle
Expansion
Reservoir
RH Transaxle
RH Transaxle
Lockout Rod
Clutch
PTO Clutch
Lever
Parking Brake
Linkage
Fuel Selector
Valve
Fuel Pump
(not visible)
Fuel Filter
Air Intake Hose
Oil Fill/
Dipstick
Muffler Heat
Rubber Bumpers
(Body Support)
Top View (Body Raised)
8
Shield
Air Intake
Plenum
Safety Instructions
Pay particular attention to any information labeled
DANGER, WARNING, CAUTION, IMPORTANT,
and NOTE in this manual.
When you see the Safety Alert Symbol ( ),
read, understand, and follow the instructions. Failure to comply with safety instructions may result in
personal injury.
The seriousness or degree of importance of each
type of information is defined as follows:
DANGER
An IMMEDIATE hazard that WILL result in
severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.
WARNING
A POTENTIAL hazard that COULD result in
severe personal injury or DEATH, if warning is ignored and proper safety precautions are not taken.
Walker Manufacturing cannot predict every potentially dangerous situation. Therefore, items labeled
as such in this manual do not cover all conceivable
situations. Any person using proc edures, tools, or
control techniques not recommended by Walker
Manufacturing must take full responsibility for safety .
The Walker Rider Lawnmower has been designed
with many safety features to protect the operator
from personal harm or injury. However , it is necessary
for the operator to use safe operating procedures at
all times. Failure to follow safety instructions
contained in this manual may result in personal
injury or damage to equipment or property.
If you have any questions concerning setup, operation, maintenance, or safety, please contact your
authorized Walker Mower Dealer or call Walker
Manufacturing Company at (970) 221-5614.
BEFORE OPERATING
1. Read and understand the contents of this
Owner's Manual before starting and operating the machine. Become thoroughly familiar
with all machine controls and how to stop the
machine and disengage the controls quickly.
Replacement Owner's Manuals are available by
sending the Model and Serial Number to:
CAUTION
Possible hazards or unsafe practices that
MAY result in MODERATE personal injury
or property damage, or machine damage, if
warning is ignored and proper safety precautions are not taken.
IMPORTANT: Identifies mechanical information
demanding special attention, since it deals with the
possibility of damaging a part or parts of the
machine.
NOTE: Identifies information worthy of special
attention.
Walker Manufacturing Company
5925 East Harmony Road
Fort Collins, CO 80528
2. Never allow children to operate rider mower.
Do not allow adults to operate without proper
instruction.
3. Clear the area to be mowed of any foreign
objects which may be picked up and thrown by
cutter blades. Pick up all sticks, stones, wire,
and any other debris.
4. Keep everyone, especially children a nd pets, a
safe distance away from the area being mowed.
Do not mow with bystanders in the area.
5. Do not operate the machine barefoot or wearing
sandals, sneakers, tennis shoes, or similar lightweight footwear. We ar substantial protective
footwear.
9
Safety Instructions
6. Do not wear loose fitting clothing that could get
caught in moving parts. Do not operate this
machine while wearing shorts; always wear
adequate protective clothing, including long
pants. Wearing safety glasses, safety shoes,
and a helmet is advisable and required by some
local ordinances and insurance regulations.
7. Prolonged exposure to loud noise can cause
impairment or loss of hearing. Operator hear-
ing protection is recommended. Wear a
suitable hearing protective device, such as earmuffs or earplugs.
8. Keep all protective shields and safety de-
vices in place. If a protective shield, safety
device, or decal is damaged, unusable, or missing, repair or replace it before operating the
machine.
9. Be sure interlock switche s are functioning
correctly, so the engine cannot be started unless the Forward Speed Control lever is in the
NEUTRAL-PARK position, and the PTO clutch
is in the DISENGAGED position. Also, the
engine should stop if the operator lifts off the
seat with either the Forward Speed Control
(FSC) out of the NEUTRAL-PARK position or
the PTO clutch in the ENGAGED position.
NOTE: There is a 1 to 1-1/2 second time delay
function on the seat switch to avoid engine
power interruption when driving over bumps.
10. Handle gasoline with care. Gasoline is highly
flammable and its vapors are explosive:
a. Use an approved fuel container.
b. Never add fuel to a running engine or hot
engine (allow hot engine to cool several
minutes).
11. Never attempt to make any adjustments
while the engine is running, except where specifically instructed to do so.
12. The electrical system battery contains sulfuric
acid. Avoid any contact with skin, eyes, and
clothing. Keep the battery and acid out of reach
of children.
WARNING
The engine exhaust from this product
contains chemicals known to the State of
California to cause cancer, birth defects
or other reproductive harm.
OPERATING
1. Operate the mower only in daylight or in good
artificial light with good visibility of the area being
mowed.
2. Sit on the seat when starting the engine and
operating the machine. Keep feet on the deck
footrests at all times when the tractor is moving
and/or mower blades are operating. Never
operate the tractor without deck or implement installed.
3. For a beginning operator, learn to steer
(maneuver) the tractor with a slow engine
speed before attempting any mowing operation. Be aware that, with the front mounted
mower configuration, the back of the tractor
swings to the outside during turns.
4. Remember, for an emergency stop, the forward
motion of the tractor can always be stopped by
pulling the Forward Speed Control (FSC) into
the NEUTRAL-PARK position.
10
c. Keep matches, cigarettes, cigars, pipes,
open flames, or sparks away from the fuel
tanks and fuel container.
d. Always fill the fuel tank(s) outdoors using
care. Fill to about one inch from the top of
the tank. Use a funnel or spout to prevent
spilling.
e. Replace the machine fuel cap(s) and con-
tainer cap securely and clean up any spilled
fuel before starting the engine.
5. In case the transmission drive belt breaks during
operation, and if the machine is on a slope, the
machine will freewheel down the slope. To
maintain control, immediately (1) Release the
steering levers and simultaneously (2) Move the
FSC to the NEUTRAL-PARK position. When
the machine is stopped or moving slowly,
engage the parking brake.
NOTE: This is exactly the same procedure
used to normally stop and park the machine.
Safety Instructions
6. Disengage the blade clutch and put the FSC in
the NEUTRAL-PARK position before starting
the engine (an ignition interlock switch normally
prevents starting of the machine if these controls
are in the OPERATING position).
7. Do not run the engine in a confined area
without adequate ventilation. Exhaust fumes
are hazardous and can be deadly.
8. Do not carry passengers - maximum seating
capacity is one (1) person.
9. Watch for holes, rocks, and roots in the terrain
and for other hidden hazards. When mowing tall
grass, mow higher than desired to expose any
hidden obstacles. Then, clean the area and
mow to the desired height.
10. Avoid sudden star ts or stops. Before backing
the machine up, look to the rear to be sure no
one is behind the machine. Watch carefully for
traffic when crossing or working near r oadways.
11. Disengage the blade drive when transporting
the machine across drives, sidewalks, etc. Never
raise the mower deck while blades are
rotating.
12. The maximum recommended side slope
operating angle is 20 degrees or 33% grade.
When operating the machine on a slope, reduce
speed and use caution to start, stop, and
maneuver. To prevent tipping or loss of control
of the machine, avoid sharp turns or sudden
changes in direction.
15. When using the tilt-up deck, observe the fol-
lowing recommendations:
a. Do not move tractor with deck in tilt-up
position.
b. Never tilt body forward with deck in tilt-up
position.
16. In case of a clogged or plugged mower deck:
a. Disengage the blade clutch (PTO), set the
parking brake, and turn the engine off before
leaving the seat.
b. LOOK to make sure blade drive shaft move-
ment has stopped before trying to unclog
the system.
c. Disconnect the spark plug wires.
d. Never place hands under the deck - use a
stick or similar tool to remove clogged ma-
terial.
17. If the cutting blades strike a solid object or the
machine begins to vibrate abnormally,
immediately disengage the blade clutch
(PTO), stop the engine, and wait for all
moving parts to stop. To prevent accidental
starting, disconnect the spark plug wires.
Thoroughly inspect the mower and r epair any
damage before restarting the engine and
operating the mower. Make sure cutter blades
are in good condition and blade bolts are
torqued to 64 ft-lb (86.8 N
·m).
13. Never adjust cutting height while the mower
is moving. Before adjusting cutting height or
servicing, move the Forward Speed Control
(FSC) into the NEUTRAL-PARK position,
engage the parking brake, and disengage the
blade clutch (PTO ). Tractor should not be mov-
ing while adjusting cutting height.
NOTE: The clutch brake should normally stop
drive line rotation within five (5) seconds of disengaging the PTO clutch.
14. Do not operate with the grass deflector
chute removed. Keep the deflector in the lowest possible position.
18. Do not touch th e engine or muffler while the
engine is running or immediately after stopping the engine. These areas may be hot
enough to cause serious burns.
19. When leaving the machine unattended, disen-
gage the blade clutch (PT O), stop the engine,
and remove the key.
11
Safety Instructions
MAINTENANCE
1. To prevent accidental starting of the engine
when servicing or adjusting the machine,
remove the key from the ignition switch and
disconnect the spark plug wires.
2. To r educe fire hazards, keep the engine free of
grass, leaves, excessive grease, and dirt.
3. Keep all nuts, bolts, and screws tight to ensure
the machine is in a safe, working condition.
Check the blade mounting bolts frequently , making sure they are tight.
4. Perform only maintenance instructions de-
scribed in this manual. Unauthorized maintenance operations or machine modifications
may result in unsafe operating conditions.
5. If the engine must be running to perform a maintenance adjustment, keep hands, feet, and
clothing away from moving parts. Do not wear
jewelry or loose clothing.
6. Always use the proper engine service
manual when working on the engine.
Unauthorized maintenance operations or
modifications to the engine may result in
unsafe operating conditions.
11. Use care when cha rging the battery or performing maintenance on the battery and
electrical system:
a. Make sure the battery charger is unplugged
before connecting or disconnecting cables
to the battery.
b. Charge the battery in a well-ventilated
space, so gases produced while charging
can dissipate. Make sure the battery vents
in the caps are open.
c. Keep sparks, flames, and smoking materi-
als away from the battery at all times. To
avoid sparks, use care when removing battery cables from posts.
d. Disconnect both battery cables before
unplugging any wiring connectors or
making repairs on the electrical system.
IMPORTANT: Keep all applicable manuals
immediately accessible to anyone who may
operate or service this machine.
7. Altering the equipment or engine in any manner
which adversely affects its operation, performance, durability , or use will VOID the warranty
and may cause hazardous conditions.
8. Never attempt to disconnect any safety devices
or defeat the purpose of these safety devices.
9. Do not change the engine governor settings or
overspeed the engine. The governor has been
factory-set for maximum-safe engine operating
speed.
10. Use genuine factory replacement part s. Substitute parts may result in product malfunction
and possible injury to the operator and/or
others.
12
Safety Instructions
SAFETY, CONTROL, AND INSTRUCTION DECALS
Safety, Control, and Instruction Decals are installed on the machine;
if any are missing, illegible, or damaged, a replacement should be ordered and installed before
putting the machine into operation. The Decal Part Number is listed below and in the Parts Section.
Each End of Mower Deck (5808)
LH Fender (2802-1)
Deck Carrier Frame (2748)
SD Deck Discharge Shield (5848)
Engine Shroud (5855)
RH Fender (2802-2)
PTO Guard (8746)
13
Safety Instructions
DRIVE BELT
WALKER P/N 2731
CARLISLE P/N R3VX1250-2
BELT TWIST
DRIVE PULLEY
WALKER P/N 2240-1
BELT TWIST
2749
BLADE PULLEY
WALKER P/N 2240
SAFETY, CONTROL, AND INSTRUCTION DECALS
Safety, Control, and Instruction Decals are installed on the machine;
if any are missing, illegible, or damaged, a replacement should be ordered and installed before
putting the machine into operation. The Decal Part Number is listed below and in the Parts Section.
BELT ROUTING
DRIVE BELT
WALKER P/N 2731
CARLISLE P/N R3VX1 250-2
BELT TWIST
BLADE PULLEY
WALKER P/N 2240
DRIVE PULLEY
WALKER P/N 2240-1
Deck Housing (2749)
On Precleaner Mount (4107-1)
BELT TWIST
2749
Rear Body, Underside (2107-4)
On Trans fer Mount (2010-4)
Rear Body,
Above Muffler (5805)
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Front Body Adjacent to
RH Steering Lever (2807-1)
Deck Carrier Frame (8653)
Deck Housing (8653-1)
On Engine (6810)
Center Body Behind Transaxles
Deck Carrier Frame (8647)
(9804)
Assembly Instructions
SETUP INSTRUCTIONS
Walker Mowers are shipped partially assembled to
our distribution network, and are typically assembled
by the selling dealer. For any additional assembly
besides the following, contact your Walker dealer.
Battery Service
Raise mower body up for battery access. Check the
battery for electrolyte level and charge. The
electrolyte level should be at the bottom of the vent
wells [1/4 to 1/2 in. (6 to 13 mm) above plates]. If the
specific gravity is less than 1.225, the battery needs
charging. If the battery has been shipped dry, or is
wet but needs service, refer to the following
instructions.
IMPORTANT: Make sure battery is securely
mounted in the frame. A loose battery may cause
damage to the case resulting in acid leakage and se vere damage to the machine. A hazard may be created by damage to critical working parts and safety
systems.
Wet Battery Service
Dry Battery Service
DANGER
Activating a battery can be dangerous.
The battery should be taken to a reliable
service station, battery store, or power
equipment dealer where a trained technician can activate the batter y safely. DO
NOT attempt to activate the battery unless
you are experienced in battery service
work. The following activation and charging instructions are provided for u se b y a
trained battery technician.
DANGER
Battery electrolyte is a poisonous and corrosive sulfuric acid solution.
• Avoid spillage and contact with skin,
eyes, and clothing - causes severe burns.
If the battery has been shipped wet, but the electrolyte
level is low or the battery needs to be charged then:
1. Fill each battery cell with drinking water to the
bottom of the vent wells.
2. Charge battery. Refer to Battery Charging in
this section.
• To prevent accidents, wear safety gog-
gles and rubber gloves when working with
electrolyte.
• Neutralize acid spills with baking soda
and water solution.
T o fill (activate) battery with electrolyte (if battery has
been shipped dry):
1. Remove the battery hold-down bar, disconnect
the battery cables and lift the battery out of the
tray.
IMPORTANT: Battery must be removed from
the mower before filling with electrolyte.
IMPORTANT: Obtain and use only battery
grade sulfuric acid electrolyte with a 1.265 specific gravity to activate the battery . DO NOT use
water or any other liquid during initial activation.
2. Remove the filler caps and carefully fill each cell
until the electrolyte is just above the plates.
3. After the battery is filled with electrolyte, replace
the filler caps and charge the battery. Refer to
Battery Charging.
15
Assembly Instructions
Battery Charging
DANGER
BA TTERIES PRODU CE EXPLOSIVE GASES
• Charge the battery in a well-ventilated
area, so that gases produced while charging can dissipate.
• Keep sparks, fla mes, and smoking mate-
rials away from the battery at all times.
• Make sure the battery cap vents are open
after the battery is filled with acid (check
manifold vent on each cap).
Deck Caster Wheel Installation
• Make sure the battery charger is unplug-
ged before connecting or disconnecting
cables to the battery.
1. Charge the battery at 15 amps for 10 minutes.
DO NOT exceed 20 amps maximum recommended charging rate. Charge until specific
gravity is at least 1.250. Total charging time
should not exceed one (1) hour.
2. After charging the battery , adjust the e lectrolyte
level to the bottom of the vent wells [1/4 to 1/2 in.
(6 to 13 mm) above the plates].
IMPORTANT: DO NOT overfill the battery.
Electrolyte will overflow through the vented caps
onto parts of the machine and WILL result in
severe corrosion.
3. Install battery.
Mower Deck Assembly
Deck Caster Wheels Installation
Deck Discharge Shield Installation
Attach the deck side discharge shield by positioning
the shield hinge lug in front of the deck mount and
fastening with two 3/8-16 x 1-1/4 in. bolts, 3/8-16
ESNA nuts, and 3/8 in. wave spring washers. The
wave washers fit between the two hinging surfaces.
Tighten the nuts until the shield moves freely but is
not loose.
WARNING
DO NOT operate the machine without the
grass deflector chute attached and in the
lowest possible position.
Attach Shield
16
1. Remove the bolts and washers from each deck
caster wheel.
2. Install wheel on fork using bolts and washers.
NOTE: Valve stem and grease zerk should
face to the inside of machine.
3. Tighten the bolts and washers.
Deck Discharge Shield Installation
Assembly Instructions
PTO Shaft Guard Installation
Position the shaft guard as shown and mount with
two 1/4-20 x 1/2 in. bolts.
Carrier Frame
Tube Sockets
Attach
Guard
PTO Shaft Guard Installation
Tilt-Up Roller Wheel Installation
Mount the two (2) tilt-up roller wheels on the bracket s
on the rear skirt of the deck housing using the
P/N 8490 axle bolt, 3/8 in. wave s pring wash er and
3/8-16 in. Whiz locknut. Tighten the axle bolt until the
wheel rolls freely, but is not loose.
Mower Deck Installation on Tractor
Deck Installation
1. Lightly grease each deck support arm ( 2) on the
tractor. Refer to Mower Deck Inst allation photo
for location of deck support arm.
2. Engage the LH deck carrier frame tube socket
first on the tractor support arms and then the RH
tube socket, slide the deck onto the support arms
approximately 3 in. (76 mm).
Retract Coupler Ring
Roller Wheel
Roller Wheel Installation
3. Retract spring-loaded coupler ring on the PTO
Tube (provided in Owner’s Packet) and insert
coupler tool. Refer to Quick Coupler Installa-
tion Tool photo.
Quick Coupler
Installation Tool
PTO Tube
Pull Back Spring-Loaded
Coupler Ring
Quick Coupler Installation Tool
17
Assembly Instructions
4. Reaching under the tractor , join the PT O tube to
the PTO shaft (align arrow decals). Slide the
PTO tube onto the spline shaft on the tractor
PTO drive shaft.
Arrows on Shaft and Tube
(used to align when sliding together)
Grease Deck
Support Arms
Mower Deck Installation (PTO Shaft Connection )
5. Slide the deck the rest of the way on the deck
arms.
PTO
Connection
IMPORTANT: To prevent damage to the
mower, make sure the PTO shaft assembly is
securely locked on the tractor, with the locking
balls fully seated in the groove and the ring in the
full forward position (refer to the Coupler Ring
“Locked” Position photo). After installation,
pull on the shaft to check for security.
Spring-Loaded Coupler Ring
In Fully Forward Position
Coupler Ring “Locked” Position
8. Raise the mower body (instead of lifting the
front of deck) and clip the counterweight springs
to the receptacle on front of body. Lower the
body to tension the springs. (Refer to Deck
Counterweight Spring Installation Photo.)
Deck Support
Arms
Mower Deck Installation
6. Install the lynch pin through the hole on the end
of each support arm to lock the deck in place
(refer to Deck Counterweight Spring Installa-
tion photo). Two (2) lynch pins are included in
the owner's packet of materials.
7. Remove Installation Tool from coupler ring and
make sure the ring has “snapped” securely on
the spline shaft.
IMPORTANT: DO NOT operate tractor with
Quick Coupler Installation Tool installed.
9. With the counterweight springs connected, the
weight on the deck caster wheels should be 15
to 25 Ib (6.8 to 11.3 kg). Check this weight by lifting on the front of the deck carrier frame. If
required, the spring tension can be adjusted by
tightening or loosening the elastic stop nuts located underneath the lower spring hook. Refer
to Deck Counterweight Spring Installation
photo.
Lynch Pins
Lock Deck On
Support Arms
(not visible)
Deck Counterweight Spring Installation
Counterweight Springs
Clip Onto Body
With Body Tilted Up
Spring Tension Adjustment
Nut Located Under Lower
Spring Hook (not visible)
18
Assembly Instructions
Deck Leveling
1. Position mower on a smooth, level surface. Set
the cutting height to the highest position - 5 in.
(127 mm) - for easy access under the deck to
measure blade height. Refer to ADJUSTING
CUTTING HEIGHT in Operating Instructions.
NOTE: A block of wood cut 5 in. (127 mm) high
is a convenient gauge to measure blade height
above ground during the leveling process.
WARNING
The machine must be shut off during this
procedure.
2. Check the side-to-side level. Rotate the outside blades sideways and measure the
distance from blade tip to ground on each side.
If measurements vary more than 1/8 in. (3 mm),
adjust the height adjustment rod on the high side
to level the deck.
3. Check the front-to-rear level. Rotate the cen-
ter blade to point forward. Measure the
distance from blade tip to ground on the front
and rear . The rear of the blade should be 1/8 to
1/4 in. (3 to 6 mm) higher than the front of the
blade; remove the chain from the deck height
adjuster clevis and adjust equally to achieve at
least 1/8 in. (3 mm) difference. Reinstall
chains.
NOTE: The mower deck and support frame are
jig welded; within normal tolerances, very little, if
any , adjustment s should be required to level the
deck. Tire pressure will influence the levelness
of the deck. Check the tire pressure as a possible cause of the deck not being level.
Height Adjustment
Front
Rod End
Should not vary more
than 1/8 in. (3 mm)
side-to-side
5 in. (127 mm)
Wood Block
Rod
Rear
Rod End
Front
Rod End
Should be 1/8 in. (3 mm)
to 1/4 in. (6 mm) higher
at the rear of the blade
Rear
Rod End
5 in. (127 mm)
Wood Block
Deck Leveling
19
Assembly Instructions
PREOPERATING CHECKLIST
Before operating the mower for the first time, and as
a routine before daily operations, it is important to
make sure the mower is properly prepared and ready
for operation. The following is a list of items to be
checked. (For a mower with frequent operation,
some of these items will not need to be checked every
day , but the operator should be aware of the condition
of each.)
For proper fuel and lubricants refer to Specifications.
FILL FUEL TANK(S)
Fill the fuel tank(s) using clean, fresh, automotive
grade unleaded gasoline (87 octane rating minimum) or gasohol (up to 10% ethyl alcohol, 90%
unleaded gasoline by volume). See engine manual
for complete fuel recommendations.
DANGER
Handle gasoline with care. Gasoline is highly flammable and its vapors are explosive.
Use safe refueling procedures:
• DO NOT fill fuel tank(s) with the engine
running.
• If the engine is hot, allow to cool before
refueling.
• Use an approved fuel container.
• Fuel the mower outdoors.
CHECK ENGINE CRANKCASE OIL LEVEL
Check the engine crankcase oil level before use and
after each 8 hours of continuous operation. Refer
to LUBRICATION for Checking Engine Crankcase
Oil Level in Maintenance Instructions.
CHECK AND SERVICE ENGINE AIR CLEAN-
ER SYSTEM
• Check air restriction gauge to make sure there is
no red indication showing.
• Check condition, cleanliness, and security of the
complete air cleaner system (inspect air filter
every 100 hours). For detailed procedures,
refer to CLEANING the Engine Air Cleaner
System in Maintenance Instructions.
CHECK ENGINE COOLING SYSTEM
Check that the engine cooling air intake screen is
free of obstruction by grass clippings or debris and
clean if required. Also, cylinder head cooling fins
should be inspected and cleaned if any build-up of
debris is noted [remove two (2) cylinder head access panels to inspect and clean].
CHECK SECURITY OF DRIVE TIRE MOUNT-
ING NUTS
The eight (8) Drive Tire mounting nuts should each
be torqued to 75-85 ft-lbs. (101.7-115.2 N
INSPECT FOUR (4) DRIVE BELTS
·m).
20
• DO NOT smoke while refueling.
• Avoid spilling fuel; use a funnel or spout.
• DO NOT overfill the fuel tank(s); fill up to
about 1 in. (25 mm) below the top of tank.
IMPORTANT: DO NOT permit dirt or other foreign
matter to enter the fuel tanks. Wipe dirt from around
the filler cap(s) before removing. Use a clean fuel
storage container and funnel.
IMPORTANT: DO NOT mix oil with gasoline.
Always use fresh, automotive gr ade unleaded gasoline or gasohol. DO NOT use premium, white, or
high-test gasoline. DO NOT us e additives, such as
carburetor cleaners, deicers, or moisture removing
agents. DO NOT use gasoline blended with methyl
alcohol.
Engine/PTO and Ground Drive.
CHECK HYDROSTATIC TRANSAXLE OIL
LEVEL
Refer to LUBRICATION for Transaxle Lubrication
in Maintenance Instructions.
CHECK TIRE PRESSURE
Deck Caster Wheel = 20 PSI (137 kPa)
Drive = 15 PSI (103 kPa)
Rear = 20 PSI (137 kPa)
Assembly Instructions
CHECK FUNCTION OF SAFETY INTERLOCK
SWITCHES
CAUTION
Refer to Operating Instructions to check for proper
operation of safety switches, both during engine
starting and with the operator leaving the seat with
tractor moving forward or with mower blades engaged.
CHECK AND CLEAN GRASS BUILDUP
UNDERNEATH MOWER DECK
Refer to CLEANING the Grass Buildup in Mower
Housing in Maintenance Instructions for deck tilt-up
and deck cleaning information.
DANGER
Never operate cutter blades with deck in
raised position because it is hazardous.
The tilt-up deck can be secured in the raised po sition
by disengaging the locking arms on each side of the
carrier frame and inserting the deck hook into the tiltup latch on the tractor body. Before operating the
tractor, make sure to re-engage the locking arms after
lowering the deck to the normal operating position.
Do not operate machine with locking
arms disengaged.
DANGER
Do not operate the mower with deck in tiltup position. Do not move the tractor with
the deck in the tilt-up position.
CHECK MOWER BLADE CONDITION, SHARP-
NESS, BALANCE, AND SECURITY OF
MOUNTING
The blade mounting bolt should be tightened to 64 ft-lb
(86.8 N
CHECKING/SERVICING for Sharpen Mower
Blades in Maintenance Instructions.
Refer to ADJUSTING CUTTING HEIGHT in Operating Instructions.
·m). If blade sharpening is required, refer to
ADJUST MOWER CUTTING HEIGHT, IF RE-
QUIRED
Tilt-Up Latch
Deck Secured in Tilt-Up Position
PERFORM ANY ADDITIONAL PROCEDURES
called for on the MAINTENANCE SCHEDULE
CHART in Maintenance Instructions.
21
Operating Instructions
CONTROL IDENTIFICATION, LOCATION, AND FUNCTION
CAUTION
Before operating the mower, become familiar with the location and function of all
operator controls. Knowing the location,
function, and operation of these controls
is important for safe and efficient ope ration of the mower.
Ignition Switch
The ignition switch is located on the right fro nt of the
body and is used to start and stop the engine. The
switch has three positions: “O” is the OFF position,
RUN is the position the key returns to after starting,
and “S” is the START position. When starting the
engine, turn the key clockwise to the “S” position. Do
not hold the key in the “S” position long er than 10
seconds. If the engine does not start, return the key
to the “O” position for at least 60 seconds before
making a restart attempt. Prolonged cranking can
damage the starter motor and shorten battery life.
Release the key when the engine starts, and it will
return to the RUN position. T o stop the engine, rotate
the key counterclockwise to the “O” position.
OFF
Ignition Switch
ON
START
Forward Spe ed
Control (FSC)
Blade Clutch
(PTO)
Body
Latch
Ignition
Switch
Operating Controls
Parking
Brake
Steering
Levers
Choke
(not visible)
Throttle
Hourmeter
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