Walker MC 20 HP User Manual
OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MC (20 HP)
™
Please Read and Save These Instructions Effective Date: 03-01-07
For Safety, Read All Safety and Operation P/N 6000-13
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 contact us at (970)
221-5614. Every customer is important to us. Your satisfaction is our goal.
Please. . .read this manual thoroughly! This manual is to be used in conjunction with the engine
manufacturer's manual for the 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 info rma ti on is important to your 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 MC with the Kohler Command CH20 (20.0 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
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
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___________________________ 6
GHS SYSTEM (Optional)__________________ 6
SEAT__________________________________ 6
FRAME/BODY CONSTRUCTION ___________ 6
Component Identification___________ 7 Safety Instructions _________________ 10
BEFORE OPERATING___________________ 10
OPERATING___________________________ 11
MAINTENANCE ________________________ 12
SAFETY, CONTROL, AND
INSTRUCTION DECALS _________________ 14
Assembly Instructions _____________ 16
SETUP INSTRUCTIONS _________________ 16
Tire Installation (Tractor)_______________ 16
Battery Service_______________________ 16
Wet Battery Service __________________ 16
Dry Battery Service __________________ 16
Battery Charging ____________________ 17
Battery Installation ___________________ 17
Mower Deck Assembly ________________ 17
Deck Caster Wheels Installation ________ 17
Deck Discharge Chute Installation ______ 18
Deck Discharge Shield Installation ______ 18
PTO Shaft Guard Installation __________ 18
Tilt-Up Roller Wheel Installation ________ 18
Mower Deck Installation on Tractor ______ 19
Deck Installation ____________________ 19
Deck Leveling ______________________ 21
PREOPERATING CHECKLIST ____________ 22
Operating Instructions_____________ 24
CONTROL IDENTIFICATION,
LOCATION, AND FUNCTION _____________ 24
Ignition Switch_______________________ 24
Engine Choke________________________ 24
Engine Throttle ______________________ 25
Forward Speed Control (FSC) __________ 25
Steering Levers ______________________ 25
Blade Clutch (PTO) ___________________ 25
Parking Brake _______________________ 25
Transmission Lockout Levers __________ 25
Hourmeter __________________________ 26
Oil Pressure Warning Horn_____________ 26
Circuit Breaker (7 Amp) _______________ 26
Light Switch (For Optional Lights)_______ 26
STARTING THE ENGINE_________________ 28
ADJUSTING GROUND
SPEED AND STEERING _________________ 28
ENGAGING THE MOWER________________ 30
STOPPING THE MACHINE _______________ 31
ADJUSTING CUTTING HEIGHT ___________ 31
TRANSMISSION LOCKOUT ______________ 32
RECOMMENDATIONS FOR MOWING ______ 33
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT_______________ 34
GRASS HANDLING SYSTEM (GHS) _______ 35
General Information __________________ 36
Clogging Checklist ___________________ 37
Using the Tilt-Up Deck ________________ 38
Using the GHS Catcher________________ 38
Powerfil
“Full” Signal Horn ___________________ 38
Cleaning the GHS Exhaust Screen ______ 38
Dumping the Catcher _________________ 39
Tailgate Dumping ___________________ 39
Using the Dump Bag _________________ 39
®
_________________________ 38
Table of Contents
Maintenance Instructions__________ 41
MAINTENANCE SCHEDULE CHART _______ 41
IMPORTANT TIPS FOR CARE
OF THE KOHLER ENGINE _______________ 42
Fuel System _________________________ 42
Starting/Stopping_____________________ 42
Cooling System ______________________ 42
Air Cleaner System ___________________ 42
Oil _________________________________ 42
LUBRICATION _________________________ 43
Engine Oil ___________________________ 43
Engine Break-In Oil __________________ 43
Checking Engine Crankcase Oil Level ___ 43
Changing Engine Crankcase Oil/Oil Filter _43
Mower Deck Gearbox Lubrication _______ 44
DSD52 Mower Deck Lubrication_________ 45
Tractor PTO Gearbox Lubrication _______ 46
Checking Gearbox Oil Level ___________ 46
Changing Gearbox Oil ________________ 46
Gear Axle Lubrication _________________ 46
Hydrostatic Transmission Fluid _________ 46
Checking Hydrostatic
Transmission Fluid Level ______________ 46
Grease Fitting and Oil Point Lubrication__ 47
CLEANING ____________________________ 50
Engine Air Cleaner System_____________ 50
Turbine Precleaner __________________ 50
Donaldson Radialseal™ Air Cleaner _____ 51
Engine Cooling System________________ 52
Air Intake System ___________________ 52
Cylinder Head Cooling Fins ____________ 53
Grass Buildup in Mower Housing________ 53
GHS Blower _________________________ 54
GHS Exhaust Screen __________________ 55
Hydrostatic Transmission Cooling Fins __ 55
CHECKING/SERVICING _________________ 55
Security of Air Filtration Components ____ 55
Battery______________________________ 55
Electrolyte Level ____________________ 55
Cleaning the Terminals _______________ 56
Charging the Battery _________________ 56
Tire Pressure ________________________ 56
Sharpen Mower Blades ________________ 56
Drive Belts __________________________ 57
Mower Deck Gearbox Oil Seals _________ 58
Spark Plugs _________________________ 58
Fuel Lines and Clamps ________________ 58
Blade Brake Action ___________________ 58
REPLACING/REPAIRING ________________ 58
Drive Belts __________________________ 58
Engine PTO Drive Belt _______________ 60
Jackshaft Drive Belt
GHS Blower Drive Belt _______________ 62
Hydrostatic Ground Drive Belt _________ 63
Fuel Filter ___________________________ 64
Blade Overload Shear Bolts ____________ 64
PTO Shear Pin _______________________ 65
Mower Blades _______________________ 65
ADJUSTMENTS________________________ 66
Steering Levers ______________________ 66
Tilt-Up Deck Adjustable Stop ___________ 66
_________________ 61
Warranty___________________________ 67
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 drive gearboxes,
and cutter blades.
• FORW ARD SPEED CONTROL (FSC) controls
the maximum forward speed of the tractor;
functioning as a cruise control.
• GRASS HANDLING SYSTEM (GHS
mowed material and deposits it in the catcher.
®
) collects
• POWER TAKE-OFF (PTO) transmits engine
power to run the cutter blades and GHS blower .
• POWERFIL
throughout the interior of the grass catcher by
an oscillating delivery spout.
®
spreads the mowed material
• RIGHT HAND (RH) refers to the right-hand side
of the tractor when the operator is seated facing
forward in the tractor seat.
• SIDE DISCHARGE (SD) mows but does not
collect the mowed material.
• STEERING LEVERS steer the tractor by con-
trolling the 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 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 pr ovided.
• GRASS-PAK
grass delivery spout (in the catcher) and activates the “full” signal horn when the grass
catcher is full.
®
SWITCH is mounted on the
• GROUND DRIVE refers to the dual hydr os tatic
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.
Tractor Model No. _______________________
Tractor Serial No. _______________________
Deck Serial No. _______________________
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________
Fill In By Purchaser
1
General Information
Serial Number
Tractor Serial Number Location
Serial Number
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 find a local, authorized servicing agent of the component man ufacturer. Any unauthorized work done on these
components during the warranty period may void
the warranty. If you have any difficulty find ing 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
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 CH20 gasoline engine.
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
Hydrostatic Eaton Corporation
Transmissions 15151 Highway 5
Eden Prairie, MN 55344
Gearboxes (Deck) Tecumseh Power Co.
1555 S. Jackson Street
Salem, IN 47167
812-883-3575
Serial Number
Engine Serial Number Location
2
Specifications
MODEL MC
ENGINE
Manufacturer/Model Kohler Command CH20, 2 Cyl., Gasoline (Air-Cooled)
Displacement 38.1 cu. in. (624 cc)
HP (@ 3600 RPM) 20.0
Max. RPM (No Load) 3750
Governed RPM 3600
Max. Torque [ft-lb (N
Idle RPM 1200 ± 75
Spark Plug Type Champion
Spark Plug Gap .030 in. (.76 mm)
Crankcase Capacity 2 qts (1.9 liters)
Crankcase Lubricant API SG, SH, SJ or higher Grade Oil Only with 10W-30 Viscosity above
Oil Filter 28-050-01
Fuel Tank Capacity 3 Gallons (11.4 liters)
Fuel Regular Grade Unleaded Gasoline (87 Octane)
Cooling System Capacity Air Cooled
ELECTRICAL SYSTEM
Battery 12 Volt, 35 AH, 295 CCA
Charging System Flywheel Alternator
Charging Output 15 Amp DC (Regulated)
System Polarity Negative Ground
·m) @ RPM] 32 (43) @ 2500
®
RC12YC
0° F (-18° C), or 5W-20 or 5W-30 Viscosity below 32° F (0° C)
Ignition Electronic Capacitive Discharge
Starter 12 Volt Electric Ring-Gear Type, Solenoid Shift
Interlock Switch Ignition Lockout by Seat Switch, Transmission Neutral and Blade Clutch
Circuit Breaker Auto Reset (30A)
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
3
Specifications
MODEL MC
TRANSMISSION (continued)
Neutral Transmission Release by Manual Dump Valve
Final Drive Gear Drive Axle
Transmission Fluid
Factory Service Mobil 1 Synthetic Motor Oil (15W-50)
Alternate Transmission Fluid SAE 30W Straight Viscosity Motor Oil
Transmission Fluid Capacity 1 qt (1 liter)
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
PTO Shaft Quick Disconnect Spline Sha ft with Two High-Speed U-Joints
Blade Spindle Each Blad e (2) Mo u nts Direct on Pee rle ss Right Angle
0-5 (0-8) Infinitely Variable
0-5 (0-8) Infinitely Variable
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
[22 in. (56 cm) Blade] @ 3600
RPM Engine
TIRE SIZE
Deck Caster Wheel
36, 42, 48, 56
52, 62, 74
Deck Caster Wheel (Optional)
36, 42, 48, 56 8 x 3.00-4 Foamed Rubber
Drive 18 x 8.50-10 (4-Ply Low-Profile)
Drive (Optional Narrow Tire) 18 x 7.00-8 (4-Ply)
Rear 13 x 6.50-6 (4-Ply)
TIRE PRESSURE
Deck Caster Wheel 20 PSI (137 kPa)
Drive 15 PSI (103 kPa)
Rear
DIMENSIONS (Tractor and Mower)
Length
36 in. (91 cm) GHS Model 87 in. (221 cm)
42 in. (107 cm) GHS Model 89 in. (226 cm)
2900 RPM
[16700 FPM (5090 m/min)]
8 x 3.00-4 Pneumatic (4-Ply)
11 x 4.00-5 Pneumatic
20 PSI (137 kPa)
4
Specifications
MODEL MC
DIMENSIONS (continued)
Width
36 in. (91 cm) SD Model
(with Deflector)
42 in. (107 cm) SD Model
(with Deflector)
36 in. (91 cm) GHS Model 37 in. (94 cm)
42 in. (107 cm) GHS Model 43 in. (109 cm)
Height
SD Model 37-1/2 in. (95 cm)
GHS Model 49-1/2 in. (112 cm)
Wheel Base (Tractor) 42-1/4 in. (107 cm)
Tread Width (Tractor)
Standard Tires 28-1/4 in. (72 cm)
41-3/4 in. (106 cm)
47-3/4 in. (121 cm)
Optional Tires 29-3/4 in. (76 cm)
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) SD Model 20 in. (51 cm) Two (2) Clockwise-Rotating Blades with a 4 in.
(10 cm) Center Overlap
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) SD Model 22 in. (56 cm) Two (2) Clockwise-Rotating Blades with a 2 in.
(5 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
CURB WEIGHT (Approximate)
SD Tractor Only 622 lb (282 kg)
GHS Tractor Only 753 lb (342 kg)
SD Tractor and 36 in. SD Deck 752 lb (341 kg)
SD Tractor and 42 in. SD Deck 787 lb (357 kg)
GHS Tractor and 36 in. GHS Deck 878 lb (398 kg)
GHS Tractor and 42 in. GHS Deck 954 lb (433 kg)
5
Specifications
MODEL MC
DRIVE BELTS
Engine PTO Walker P/N 8230
Jackshaft Drive Gates 3VX385 (or Walker P/N 6251-1)
Ground Drive, Micro-V Walker P/N 7248
Blower (GHS Model) Walker P/N 7234-1
GHS SYSTEM (Optional)
Blower 4-1/2 x 10-1/2 x 1/2 in. (11 x 27 x 1 cm) Three-Blade Paddle Wheel
Blower Brake Band Brake (Works in Combination with PTO Clutch, Stops
Max. Blower Speed 3600 RPM
Grass Catcher Capacity* 89 Gallons (335 liters)/9.5 Bushels
Optional Grass Catcher Capacity 63 Gallons (238 liters)/6.7 Bushels
(Driven by Mower Engine)
Blower within Five (5) Seconds of PTO Disengagement)
Full Signal Oscillating Vane Switch Mounted on Grass Delivery Spout T riggers
Horn Signal
Powerfil
SEAT
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)
®
Oscillating Delivery Spout Driven by 12 Volt Electric Gearmotor
Spreads Mate rial throughout Interior of Catcher @ 25 Cycles/Minute
Contour-Molded, with Nylon Backed Vinyl Cover and Integral
Foam Cushion
*Optional (6.7 Bushel) Grass Catcher subtracts approx. 5 lb (2 kg) and 5 in. (13 cm) in Height
NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time
without notice or obligation.
6
Component Identification
NOTE: Control Identification
shown in Operating
Instructions section.
Catcher Door
Safety Latch
Anti-Scuff
Roller
Catcher Lift /
Dump Handle
Fuel Tank and Cap
Transmission Control
Rod Adjustment Nut
(RH)
Turbine
Precleaner
Grass Handling System
9.5 Bushel Catcher
Tilt-Up
Latch
Spring Clip
Counterweight Spring
and Protective Cover
Transmission Control Rod
Adjustment Nut (LH)
Deck Support Pins
and Height Adjustment
Hitch Pins
Deck Support Arms
Deck Lift Handle
(Cutting Height Adjustment)
Tilt-Up Hook
(Not Visible)
Front View and Right Side View
Tilt-Up
Deck Handle
Footrests
Deck
Caster Wheels
7
Component Identification
Catcher Door
Gas Spring
Protective Cover
Catcher Lift /
Dump Handle
Catcher Door
Gas Spr ing
Removable Grass
Catcher Screen
(Not Visible)
Catcher Exhaust
Deflector
Catcher
Door
Left Hand
Drive Wheel
Muffler
Tailpipe
Oil
Filter
Rear View and Left Side View
Oil Drain
Plug
Tailwheel Fork
and Wheel
Catcher
Door Handle
Anti-Scuff
Roller
8
Component Identification
Air Restriction
Indicator
Rubber Bumper
(Body Support)
(Not Visible)
Donaldson
Air Cleaner
Air Cleaner
Cover
Rubber Bumper
(Body Support)
Fuel Pump
Air Intake
Hose
Precleaner
Tube
Fuel Tank Cap
Jackshaft
PTO Gearbox
Dipstick
Turbine
Precleaner
RH Transmission
Lockout Lever
PTO
Clutch Lever
Positive (+)
Battery Cable
Muffler
Muffler Heat Shield
Throttle and
Choke Linkage
Oil Fill/
Dipstick
GHS Blower
RH Hydrostatic
Transmission
Neutral Safety
Switch
LH Hydrostatic
Transmission
Negative (-)
Battery Cable
Top View (Engine Compartment)
Battery
30 Amp
Circuit Breaker
LH Transmission
Lockout Lever
9
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 procedures, 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 con-
tained 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 s afety 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 ever yone, e specia lly child ren 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. Wear substantial pro-
tective footwear.
10
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; particularly
for continuous operation of the GHS Model due
to blower noise level. 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 switches are functionin g
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 the PTO clutch in the ENGAGED position.
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).
c. Keep matches, cigarettes, cigars, pipes,
open flames, or sparks away from the fuel
tank and fuel container.
d. Always fill the fuel tank outdoors using care.
Fill to about one inch from the top of the tank.
Use a funnel or spout to prevent spilling.
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.
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.
3. For a beginning operator, learn to steer (ma-
neuver) 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 a n emergency stop, the forw ard
motion of the tractor can always be stopped by
pulling the Forward Speed Control (FSC) into
the NEUTRAL-PARK position.
5. In case either of the transmission drive belts
break 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-P ARK 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.
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).
e. Replace the machine fuel cap and container
cap securely and clean up any spilled fuel
before starting the engine.
11. Never attempt to make any adjustments
while the engine is running, except where
specifically instructed to do so.
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.
11
Safety Instructions
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. Ne-
ver 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 tipp ing or loss of co ntrol of
the machine, avoid sharp turns or sudden
changes in direction.
13. Never adjust cutting height with the engine
running. Before adjusting cutting height or
servicing, disengage the blade clutch (PTO),
stop the engine, and remove the ignition key.
Wait for all movement to stop before getting off
the seat.
NOTE: A blade/blower brake should normally
stop drive line rotation within five (5) seconds of
disengaging the PTO clutch.
17. For GHS equipped models, use care when
closing the grass catcher door . Keep fingers
and hands away from the hinge and pinch
points when the door is being closed. Also,
keep fingers and hands clear of the door frame.
The door is held closed with springs and the
door may slam shut with considerable force.
18. In case of a clogged or plugged mower deck
or GHS catching system:
a. Disengage the blade clutch (PTO) and turn
the engine off before leaving the seat.
b. LOOK to make sure blade drive shaft and
blower drive pulley movement has stopped
before trying to unclog the system.
c. Disconnect the spark plug wires.
d. Never place hands under the deck or in the
GHS blower - use a stick or similar tool to
remove clogged material.
19. If the cutting blades strike a solid object or the
machine begins to vibrate abnormally, immedi-
ately disengage the blade clutch (PTO), stop
the engine, and wait for all moving parts to
stop. T o prevent accidental starting, disconnect
the spark plug wires. Thoroughly inspect the
mower and repair any damage be fore restarting
the engine and operating the mower . Make sure
cutter blades are in good condition and blade
nuts are torqued to 60 ft-lb (81.3 N
·m).
12
14. For side discharge mower decks, do not oper-
ate with the grass deflector chute removed.
Keep the deflector in the lowest possible position.
15. For tractors equipped with tilt-up deck, observe
the following recommendations:
a. Do not move tractor with deck in tilt-up po-
sition.
b. Never tilt body forward with deck in tilt-up
position.
16. For GHS equipped models, do not operate the
machine with the grass catcher in the DUMP
position or with the back door OPEN. Dan-
gerous projectiles may be thrown out of the discharge chute or the back of the grass catcher.
20. Do not touch the engine or muffler while the
engine is running or immediately after stopping
the engine. These areas may be hot enough to
cause serious burns.
21. When leaving the machine unattended, dis-
engage the blade clutch (PTO), stop the engine, and remove the key.
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.
Safety Instructions
2. T o reduce fire hazards, keep the engine free of
grass, leaves, excessive grease, and dirt.
3. Keep all nuts, bolts, and screws tigh t to ensu re
the machine is in a safe, working condition.
Check the blade mounting nuts 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. Unautho-
rized maintenance operations or modifications
to the engine may result in unsafe operating
conditions.
7. Altering the equipment or engine in any manner
which adversely affects its operation, performance, durability, or use will VOID the warran-
ty and may cause hazardous conditions.
c. Keep sparks, flames, and smok ing 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.
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 parts.
Substitute parts may result in product malfunction and possible injury to the operat or and/or
others.
11. Use care when charging 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.
13
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 Manual.
Each End of Mower Deck (5808)
SD Deck Discharge Shield (5848)
Adjacent to Blower Discharge Chute
through Body (5804)
Engine Shroud (5855)
Rear of Grass Catcher Exhaust Screen (5869)
Catcher Safety Latch,
RH Side (5874)
Hydrostat Oil
Reservoir (5810-2)
Gear Axle (5810-1)
14
Underside of Body (5861)
LH Side of Body,
Above Muffler (5805)
Lower Front Body (6807)
Bridge Assembly and
LH Gear Axle (5810-3)
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 Manual.
Top of Blower Housing (5819)
Deck Gearbox Cover (5807-3)
Jackshaft Support Adjacent
to Dipstick (7827)
Right Side of Body (5806)
Deck Carrier Frame (5865)
Fender, LH Side (5802-2)
On Engine (6810)
Right Side, Below Operator Seat (7809)
Catcher Door Hinge Bar, LH and RH Sides (5868)
Deck Carrier Frame (8653)
Deck Carrier Frame (8647)
Rear Bumper (5815)
Fender , RH Side (7802)
15
Assembly Instructions
SETUP INSTRUCTIONS
Walker Mowers are shipped partially assembled.
After uncrating the tractor and mower deck, initial
setup is required.
NOTE: During the process of unpacking, any damaged or missing parts sh ould be note d and reporte d
to the delivering carrier immediately (put in writing
within 15 days). The carrier will provide directions
for proceeding with a claim to receive compensation
for damage.
Tire Installation (Tractor)
• Install the drive tires using the eight (8) lug bolts
that are supplied with the owne r's packet of ma terials. Drive tires are 18 x 8.50-10, 4-ply; rear tire is
13 x 6.50-6, 4-ply.
• Check and adjust the inflation of the tires. The
tire inflation recommendations are:
Drive = 15 PSI (103 kPa)
Rear = 20 PSI (137 kPa)
Battery Service
Tilt mower body up (lift on rear of body) 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
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.
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.
• 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.
16
Assembly Instructions
3. After the battery is filled with electrolyte, replace
the filler caps and charge the battery. Refer to
Battery Charging.
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, f lames, 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).
• 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 electrolyte
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.
Battery Installation
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.
Install the battery in the mower as shown in Battery
Installation photo. Connect the positive and negative cables to the proper battery terminal (red cable
and boot connects to the Positive (+) terminal).
Slide the rubber boot up and ov er the battery p ost,
making sure it covers the post completely to pre-
vent an electrical short.
WARNING
Make sure the battery cap vent s are open.
Improper venting of the battery COULD
cause a battery explosion.
Battery Clamp
Secured by
Wing Nut(s)
(+) Battery Cable
Connection
Battery Installation
Mower Deck Assembly
Deck Caster Wheels Installation
1. Remove the bolt, nut, axle spacer tube, and
spacer washers from each deck caster wheel
fork.
NOTE: Spacer washers are used only when
the optional semi-pneumatic deck wheels (8.25
x 2.75) are installed.
2. Fit the axle spacer tube through the wheel hub,
position the spacer washer on each side of the
hub (if used), and fit the assembly into the wheel
fork.
3. Insert the 3/8-16 x 4-1/2 in. bolt through the
wheel fork with the bolt head to the outside and
install the 3/8-16 in. Keps nut.
4. Tighten the bolt and nut until the axle spacer
tube bottoms against the inside of the wheel
fork (will not turn) while the wheel and spacer
washers (if used) spin freely without binding.
17
Assembly Instructions
Grease Fitting
Locations
Spacer Washer
Axle Spacer Tube
Deck Caster Wheel Installation
5. Grease the caster wheel bearings and caster
pivot bearings - one grease fitting for ea ch wheel
and each pivot.
Deck Discharge Chute Installation (GHS Rear Discharge Models Only)
Mount the discharge chute hinge on top o f the deck
discharge opening using the 1/4-20 x 1/2 in. socket
button head bolt and 1/4-20 ESNA nut. Position the
bolt with the head inside of the chute and the n ut on
the outside.
Deck Discharge Shield Installation (Side Discharge Models Only)
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 shield att ached a nd in the
lowest possible position.
Attach Shield
Carrier Frame
Tube Sockets
Attach Guard
Nut on Top
Discharge Chute and PTO Shaft Guard
Installation on Rear Discharge Deck
Attach
Chute
Discharge Shield Installation
on Side Discharge Deck
PTO Shaft Guard Installation
Position the shaft guard as shown and mount with
two 1/4-20 x 1/2 in. bolts.
Tilt-Up Roller Wheel Installation
Mount the two (2) tilt-up roller wheels on the brackets on the rear skirt of the deck housing using the
P/N 8490 axle bolt, 3/8 in. wave spring washer and
3/8-16 in. Whiz locknut. Tighten the axle bolt until
the wheel rolls freely, but is not loose.
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