OWNER’S MANUAL
Safety, Assembly, Operating, and Maintenance Instructions
Model MT (20.0 HP)
Model MTL (25.0 HP)
Model MTEFI (26.0 HP)
(Covers 2004 Production)
™
Please Read and Save These Instructions
For Safety, Read All Safety and Operation
Instructions Prior to Operating Machine
Effective Date: 01-01-04
P/N 8000-9
Price $5.00
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Table of Contents
Operating Instructions_____________ 31
General Information ________________ 4
CONTROL IDENTIFICATION,
HIGHLIGHTED INFORMATION _____________ 4
GLOSSARY ____________________________ 4
IDENTIFYING NUMBER LOCATIONS________ 4
ENGINE SERIAL NUMBER LOCATION ______ 5
SERVICING OF ENGINE AND
LOCATION, AND FUNCTION _____________ 31
Operating Controls ___________________ 31
Engine Choke - (Model MT and MTL only) 31
Engine Throttle _____________________ 32
Forward Speed Control (FSC) _________ 32
Steering Levers _____________________ 32
Blade Clutch (PTO) __________________ 32
Parking Brake ______________________ 32
Front Body Latch Release ____________ 34
Transmission Lockout Levers __________ 34
Optional Cold Start Lever
(Jackshaft Drive Belt Release) _________ 34
Instrument Panel _____________________ 35
Hourmeter _________________________ 36
Voltmeter _________________________ 36
Oil Pressure Warning Light ____________ 36
Over Temperature Warning Light
DRIVETRAIN COMPONENTS ______________ 5
Specifications________________________ 6
ENGINE________________________________ 6
ELECTRICAL SYSTEM ___________________ 7
TRANSMISSION_________________________ 7
BLADE DRIVE __________________________ 8
TIRE SIZE ______________________________ 8
TIRE PRESSURE ________________________ 8
DIMENSIONS (Tractor and Mower) _________ 8
MOWER DECK__________________________ 8
CURB WEIGHT__________________________ 9
DRIVE BELTS___________________________ 9
GHS SYSTEM (Optional)__________________ 9
SEAT_________________________________ 10
FRAME/BODY CONSTRUCTION __________ 10
(Model MT and MTEFI Only) __________ 36
Water Temperature Warning Light
(Model MTL) _______________________ 36
Water Temperature Gauge (Model MTL) _ 36
Engine Service Light - Model MTEFI ____ 36
Ignition Switch ______________________ 37
Light Switch (For Optional Lights) _______ 37
Warning Horn ______________________ 37
Circuit Breakers ____________________ 37
STARTING THE ENGINE_________________ 38
ADJUSTING GROUND
Component Identification__________ 11
Safety Instructions _________________ 16
BEFORE OPERATING___________________ 16
OPERATING___________________________ 17
MAINTENANCE ________________________ 18
SAFETY, CONTROL
SPEED AND STEERING _________________ 39
ENGAGING THE MOWER________________ 40
STOPPING THE MACHINE _______________ 41
ADJUSTING CUTTING HEIGHT ___________ 42
TRANSMISSION LOCKOUT ______________ 42
RECOMMENDATIONS FOR MOWING ______ 43
RECOMMENDATIONS FOR TILT-UP DECK
OPERATION/TRANSPORT _______________ 44
GRASS HANDLING SYSTEM (GHS) _______ 45
General Information __________________ 46
Clogging Checklist ___________________ 47
Using the Tilt-Up Deck ________________ 48
Using the GHS Catcher________________ 48
Powerfil ® _________________________ 48
“Full” Signal Horn ___________________ 48
Cleaning the GHS Exhaust Screen ______ 48
Dumping the Catcher _________________ 49
Tailgate Dumping ___________________ 49
Using the Dump Bag _________________ 49
Power Dump Option _________________ 50
AND INSTRUCTION DECALS _____________ 20
Assembly Instructions _____________ 22
SETUP INSTRUCTIONS _________________ 22
Tire Installation (Tractor)_______________ 22
Battery Service_______________________ 22
Wet Battery Service __________________ 22
Dry Battery Service __________________ 22
Battery Charging ____________________ 23
Battery Installation ___________________ 23
Mower Deck Assembly ________________ 24
Deck Caster Wheels Installation ________ 24
Deck Discharge Chute Installation ______ 24
Deck Discharge Shield Installation ______ 25
PTO Shaft Guard Installation __________ 25
Tilt-Up Roller Wheel Installation ________ 25
Mower Deck lnstallation on Tractor ______ 25
Deck Installation ____________________ 25
Deck Leveling ______________________ 27
PREOPERATING CHECKLIST ____________ 28
1
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Table of Contents
Mower Deck Gearbox Oil Seals _________ 71
Spark Plugs _________________________ 71
Ignition Wires________________________ 71
Fuel Lines and Clamps ________________ 71
Radiator Hoses and Clamps - MTL ______ 71
Engine Starter _______________________ 71
Blade Brake Action ___________________ 71
PTO U-Joints ________________________ 71
REPLACING/REPAIRING ________________ 72
Drive Belts __________________________ 72
Engine PTO Drive Belt _______________ 73
Jackshaft Drive Belt _________________ 74
GHS Blower Drive Belt _______________ 75
Hydrostatic Ground Drive Belt _________ 76
Fuel Filter - Model MT and MTL _________ 77
Fuel Filter - MTEFI ____________________ 77
Blade Overload Shear Bolts ____________ 77
PTO Shear Pin _______________________ 78
Mower Blades _______________________ 78
Mower Deck Gearbox Replacement______ 79
GHS Blower Assembly ________________ 80
GHS Blower Assembly Removal _______ 80
Blower Wheel Removal ______________ 80
Blower Wheel Installation _____________ 81
GHS Blower Assembly Installation ______ 81
ADJUSTMENTS________________________ 82
Safety Switches ______________________ 82
Tail Wheel Bearing Preload ____________ 82
Steering Levers ______________________ 82
Blade Clutch (PTO) ___________________ 83
Clutch Engagement/Belt Tension _______ 83
Clutch Disengagement/Brake Action ____ 84
Stop Block Eccentric Adjustment _______ 85
Clutch Idler Pulley Travel Adjustment ____ 85
Blade Brake Band Adjustment _________ 85
Transmission Control _________________ 86
Set Forward Travel Limit (Stop) ________ 86
Steering Lever End Play Adjustment ____ 87
Neutral Function Adjustment __________ 87
Straight Ground Travel Adjustment _____ 88
Forward Speed Control Friction Lock ____ 88
Tilt-Up Deck Adjustable Stop ___________ 89
Carburetor - MT ______________________ 89
Engine Idle Adjustment _______________ 89
Carburetor - MTL _____________________ 90
Low Idle Speed (RPM) Adjustment ______ 90
GHS “Full” Signal Horn
Maintenance Instructions__________ 52
MAINTENANCE SCHEDULE CHART _______ 52
IMPORTANT TIPS FOR CARE
OF THE KOHLER ENGINE _______________ 53
Fuel System _________________________ 53
Starting/Stopping_____________________ 53
Cooling System - MT, MTEFI____________ 53
Cooling System - MTL _________________ 53
Air Cleaner System ___________________ 53
Oil _________________________________ 54
LUBRICATION _________________________ 54
Engine Oil ___________________________ 54
Engine Break-In Oil __________________ 54
Checking Engine Crankcase Oil Level ___ 54
Changing Engine Crankcase Oil/Oil Filter _ 55
Grease Fitting and Oil Point Lubrication __ 55
Mower Deck Gearbox Lubrication _______ 58
DSD52 or DSD62 Mower Deck Lubrication 58
Tractor PTO Gearbox Lubrication _______ 59
Checking Gearbox Oil Level ___________ 59
Changing Gearbox Oil ________________ 59
Gear Axle Lubrication _________________ 59
Hydrostatic Transmission Fluid _________ 60
Checking Hydrostatic
Transmission Fluid Level ______________ 60
Changing Hydrostatic Transmission Fluid _ 60
CLEANING ____________________________ 61
Engine Air Cleaner System _____________ 61
Turbine Precleaner __________________ 62
Donaldson Radialseal™ Air Cleaner _____ 62
Engine Cooling System - MT20 and MTEFI 64
Air Intake System ___________________ 64
Cylinder Head Cooling Fins ____________ 64
Engine Cooling System - MTL __________ 64
Radiator Screen and Cooling Fins ______ 64
Flushing Radiator and Changing Coolant _ 65
Grass Buildup in Mower Housing________ 65
GHS Blower _________________________ 66
GHS Exhaust Screen __________________ 66
Hydrostatic Transmission Cooling Fins __ 67
CHECKING/SERVICING _________________ 67
Engine Cooling System - MTL __________ 67
Coolant Level ______________________ 67
Security of Air Filtration Components ____ 68
Battery______________________________ 68
Electrolyte Level ____________________ 68
Cleaning the Terminals _______________ 69
Charging the Battery _________________ 69
Tire Pressure ________________________ 69
Wheel Bolt Torque ____________________ 69
Sharpen Mower Blades ________________ 69
Drive Belts __________________________ 70
with Grass-Pak® Switch _______________ 91
Adjustment
(When Horn Sounds at Wrong Time)_____ 91
2
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Table of Contents
ELECTRICAL SYSTEM __________________ 92
Circuit Breakers ______________________ 92
Wiring Diagram - Model MT_____________ 93
Wiring Diagram - Model MTEFI __________ 94
Wiring Diagram - Model MTL____________ 96
Warranty ___________________________ 97
3
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General Information
HIGHLIGHTED INFORMATION
•
LEFT HAND (LH) refers to the left-hand side of
the tractor when the operator is seated facing
forward in the tractor seat.
Walker Manufacturing recommends that any ser-
vice 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 oper-
ation 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.
•
•
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.
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.
•
•
•
SIDE DISCHARGE (SD) mows but does not
collect the mowed material.
STEERING LEVERS steer the tractor by con-
trolling the dual hydrostatic transmissions.
GLOSSARY
There are many terms that are either unique to this
equipment or that are used as acronyms. The fol-
lowing terms and their definitions will help while
using this manual:
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.
•
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.
IDENTIFYING NUMBER LOCATIONS
•
•
ELECTRONICCONTROL UNIT (ECU)controls
engine functions such as spark timing, fuel/air
ratio, etc.
The tractor serial number plate is affixed to the trac-
tor 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 RH side of
the RH 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.
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.
Tractor Model No. _______________________
Tractor Serial No. _______________________
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.
Deck Serial No.
_______________________
•
•
GROUND DRIVE refers to the dual hydrostatic
transmissions which drive the main wheels.
Engine Model No. _______________________
Engine Serial No. _______________________
Date of Purchase _______________________
HYDROSTATIC TRANSMISSION transmits
and controls power from the ground drive belt to
the main drive wheel.
Fill In By Purchaser
4
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General Information
Serial Number
Serial Number
Tractor Serial Number Location
Engine Serial Number Location (MTL)
SERVICING OF ENGINE AND DRIVETRAIN
COMPONENTS
The detailed servicing and repair of the engine,
hydrostatic transmission, and gearboxes are not cov-
ered in this manual. Only routine maintenance and
general service instructions are provided. For the
service of these components during the limited war-
ranty period, it is important to find a local, authorized
servicing agent of the component manufacturer. Any
unauthorized work done on these components dur-
ing the warranty period may void the warranty. If
you have any difficulty finding an authorized outlet or
obtaining warranty service, please contact our Ser-
vice Department for assistance:
Serial Number
Mower Deck Serial Number Location
ENGINE SERIAL NUMBER LOCATION
Refer to the engine manual that accompanies this
manual for the location of the engine serial number.
For the mower model(s) covered by this manual, an
engine manual is available covering the Kohler en-
gines.
Walker Manufacturing Company
5925 E. Harmony Road
Fort Collins, CO 80528
1-970-221-5614
Service manuals are available for each of these
components from their respective manufacturers as
follows:
Kohler Engines
Kohler Company
Kohler, WI 53044
Hydrostatic
Transmissions
Eaton Corporation
15151 Highway 5
Eden Prairie, MN 55344
Gearboxes (Deck)
Tecumseh Products Co.
900 North Street
Serial Number
Grafton, Wl 53024
Engine Serial Number Location
(MT20 and MTEFI)
5
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Specifications
AIR COOLED
MT (20.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MODEL
ENGINE
Manufacturer/Model
Kohler Command CH20,
2 Cyl., Gasoline (Air Cooled)
Kohler AegisTM LH685, 2 Cyl.,
Gasoline (Liquid Cooled)
Kohler Command Pro
CH26, 2 Cyl., Gasoline (Air
Cooled), Electronic Fuel
Injection (EFI)
Displacement
Displacement
Displacement
CH20
CH26
LH685
38.1 cu. in. (624 cc)
44.0 cu. in. (725 cc)
41.1 cu. in. (674 cc)
HP (@ 3600 RPM)
HP (@ 3600 RPM)
HP (@ 3600 RPM)
CH20
CH26
LH685
20.0
26.0
25.0
3750
3600
Max. RPM (No Load)
Governed RPM
3750
3600
Max. Torque [ft-lb (N m) @ RPM]
CH20
CH26
LH685
32 (44.0) @ 2500
41.6 (56.4) @ 2700
35.9 (48.7) @ 2200
1200 ± 75
Idle RPM
1200 ± 75
Spark Plug Type
Spark Plug Gap
Champion RC12YC
.030 in. (.76 mm)
Champion RC14YC
.030 in. (.76 mm)
Crankcase Capacity
Crankcase Capacity
Crankcase Capacity
CH20
CH26
LH685
2.1 qts (2.0 liters)
2.1 qts (2.0 liters)
2.0 qts (1.9 liters)
Crankcase Lubricant
API SG, SH, SJ or higher
Grade Oil Only with 10W-30
Viscosity above 0° F (-18° C),
or 5W-20 or 5W-30 Viscosity
below 32° F (0° C)
API SG, SH, SJ or higher
Grade Oil Only with 10W-30
Viscosity above 0° F (-18° C),
or 5W-20 or 5W-30 Viscosity
below 32° F (0° C)
Oil Filter
12 050 01 S
12 050 01 S
Cooling System
Cooling System
Cooling System
Cooling System Capacity
(Approx.)
CH20
CH26
LH685
Air Cooled
Air Cooled
Liquid Cooled
1.25 Gallons (4.73 liters)
LH685
Coolant
50/50 Pre-Mix Anti-freeze/
water
Cooling Fan
Electric radiator cooling fan
with reversible self-cleaning
action
Fuel Tank Capacity
Fuel
5 Gallons (19.0 liters)
5 Gallons (19.0 liters)
Regular Grade Unleaded
Gasoline (87 Octane)
Regular Grade Unleaded
Gasoline (87 Octane)
6
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Specifications
AIR COOLED
MT (20.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MODEL
ELECTRICAL SYSTEM
Battery
12 Volt, 35AH, 295 CCA
Flywheel Alternator
15 Amp DC (Regulated)
Negative Ground
12 Volt, 35AH, 295 CCA
Flywheel Alternator
25 Amp DC (Regulated)
Negative Ground
Charging System
Charging Output
System Polarity
Ignition
Electronic Capacitive
Discharge
Electronic Capacitive
Discharge
Starter
12 Volt Electric Ring-Gear
Type, Solenoid Shift
12 Volt Electric Ring-Gear
Type, Solenoid Shift
Interlock Switch
Ignition Lockout by Seat
Switch, Transmission Neutral
and Blade Clutch
Ignition Lockout by Seat
Switch, Transmission Neutral
and Blade Clutch
Circuit Breaker
Manual Reset (30A)
Manual Reset (30A)
TRANSMISSION
Manufacturer/Model
Dual Hydrostatic, Eaton
Model 7, Each Wheel
Independently Driven
Dual Hydrostatic, Eaton
Model 7, Each Wheel
Independently Driven
Steering
Hand Lever Control /
Individual Wheel
Hand Lever Control /
Individual Wheel
Forward Speed Control
Precision Friction Lock Lever,
Cruise Control, with
Neutral-Park Position
Precision Friction Lock Lever,
Cruise Control, with
Neutral-Park Position
Service Brake
Parking Brake
Neutral
Dynamic Braking through
Hydrostatic Transmission
Dynamic Braking through
Hydrostatic Transmission
Mechanical Pin Lock in
Transmission Gear
Mechanical Pin Lock in
Transmission Gear
Transmission Release by
Manual Dump Valve
Transmission Release by
Manual Dump Valve
Final Drive
Gear Drive Axle
Gear Drive Axle
Transmission Fluid
Factory Service
Mobil 1 Synthetic Motor Oil
(15W50)
Mobil 1 Synthetic Motor Oil
(15W50)
Alternate Transmission Fluid
SAE 30W Straight Viscosity
Motor Oil
SAE 30W Straight Viscosity
Motor Oil
Transmission Fluid Capacity
Transmission Cooling
1 qt (1 liter)
1 qt (1 liter)
Cooling Fan Mounted on
Drive Pulley
Cooling Fan Mounted on
Drive Pulley
Ground Travel Speed
Forward m.p.h. (km/h)
Reverse m.p.h. (km/h)
0-5 (0-8) Infinitely Variable*
0-5 (0-8) Infinitely Variable
0-5 (0-8) Infinitely Variable*
0-5 (0-8) Infinitely Variable
* 6.5 m.p.h. with Optional Speed-Up Kit
7
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Specifications
AIR COOLED
MT (20.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MODEL
BLADE DRIVE
PTO Shaft
Quick Disconnect Splined
Shaft with Two High-Speed
U-Joints
Quick Disconnect Splined
Shaft with Two 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)
Each Blade (2) Mounts Direct
on Peerless Right Angle
Gearbox with Tee Gearbox
in Center Connected to PTO
Shaft (Complete Geared
Drive, Peerless Model 1000
Gearboxes)
Blade Drive Clutch and Brake
Manual Belt Tightener Clutch
and Band Brake (Stops
Manual Belt Tightener Clutch
and Band Brake (Stops
Blades within Five (5)
Blades within Five (5)
Seconds of Disengagement)
Seconds of Disengagement)
Max. Blade Speed
[22 in. (56 cm) Blade]
@ 3600 RPM Engine
2900 RPM
[16700 FPM (5090 m/min)]
2900 RPM
[16700 FPM (5090 m/min)]
TIRE SIZE
Deck Caster Wheel
Deck Caster Wheel (Optional)
Drive
2.80/2.50-4 Pneumatic (4-Ply)
8.25 x 2.75 Semi-Pneumatic
18 x 9.50-8 (4-Ply)
2.80/2.50-4 Pneumatic (4-Ply)
8.25 x 2.75 Semi-Pneumatic
18 x 9.50-8 (4-Ply)
Rear (Dual)
13 x 5.00-6 (4-Ply)
13 x 5.00-6 (4-Ply)
TIRE PRESSURE
Deck Caster Wheel
Drive
20 PSI (137 kPa)
15 PSI (103 kPa)
20 PSI (137 kPa)
20 PSI (137 kPa)
15 PSI (103 kPa)
20 PSI (137 kPa)
Rear
DIMENSIONS (Tractor and Mower)*
Length
91 in. (231 cm)
91 in. (231 cm)
49 in. (124 cm)
44 in. (112 cm)
42-1/4 in. (107 cm)
29-3/4 in. (76 cm)
Width
49 in. (124 cm)
Height
44 in. (112 cm)
Wheel Base (Tractor)
Tread Width (Tractor)
42-1/4 in. (107 cm)
29-3/4 in. (76 cm)
* See note under CURB WEIGHT
MOWER DECK
Width of Cut SD/GHS
Cutting Height
42 or 48 in. (107 or 122 cm)
1 to 4 in. (3 to 10 cm)
42 or 48 in. (107 or 122 cm)
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
7 Positions - 1/2 in. (1 cm)
Increment Hitch Pins Installed
in Multi-Position Deck Support
8
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Specifications
AIR COOLED
MT (20.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MODEL
MOWER DECK (continued)
Blade Size (Typical)
42 in. (107 cm) SD
22 in. (56 cm)
2 in. (5 cm) Center Overlap
(Two Blades, CW Rotation)
22 in. (56 cm)
2 in. (5 cm) Center Overlap
(Two Blades, CW Rotation)
48 in. (122 cm) GHS
Deck Suspension
25 in. (64 cm)
2 in. (5 cm) Center Overlap
(Two Blades, Counter Rotate)
25 in. (64 cm)
2 in. (5 cm) Center Overlap
(Two Blades, Counter Rotate)
Torsion-Flex Frame with
Caster Wheels and
Counterweight Springs
Torsion-Flex Frame with
Caster Wheels and
Counterweight Springs
CURB WEIGHT (Approximate)
SD Tractor Only
660 lb (299 kg)
785 lb (356 kg)
990 lb (449 kg)
705 lb (320 kg)
845 lb (383 kg)
1050 lb (476 kg)
GHS Tractor Only
Tractor and Mower*
*Dimensions and weight shown are for 48 in. (122 cm) GHS Model (typical).
Dimensions for Tractor and Mower with 42 in. (107 cm) deck are:
Length = 88 in. (224 cm)
Width = 43 in. (110 cm)
For SD Models, subtract 7 in. (18 cm) from the height.
Deck weight for 48 in. (122 cm) Tilt-Up deck = 205 lb (93 kg). Deck sizes range from 42 to 74 in.
(107 to 157 cm), with corresponding deck weights ranging from 170 to 400 lb (77 to 136 kg).
Optional (9.5 Bushel) Grass Catcher adds approx. 5 lb (2 kg) and 5 in. (13 cm) in Height
DRIVE BELTS
Engine PTO
Walker P/N 8230
Walker P/N 8230
Jackshaft Drive
Gates 3VX375
(or Walker P/N 6250)
Gates 3VX375
(or Walker P/N 6250)
Ground Drive, Micro-V
Blower (GHS Model)
Walker P/N 7248
Walker P/N 7248
Gates 3VX280
(or Walker P/N 7234-1)
Gates 3VX280
(or Walker P/N 7234-1)
GHS SYSTEM (Optional)
Blower
4 x 10 x 1/4 in. (10 x 25 x 1 cm)
Three-Blade Paddle Wheel
(Driven by Mower Engine)
4 x 10 x 1/4 in. (10 x 25 x 1 cm)
Three-Blade Paddle Wheel
(Driven by Mower Engine)
Blower Brake
Band Brake (Works in Combi-
nation with PTO Clutch, Stops
Blower within Five (5) Seconds
of PTO Disengagement)
Band Brake (Works in Combi-
nation with PTO Clutch, Stops
Blower within Five (5) Seconds
of PTO Disengagement)
Max. Blower Speed
3600 RPM
3600 RPM
Grass Catcher Capacity
65 Gallons (246 liters)/
7.0 Bushels
65 Gallons (246 liters)/
7.0 Bushels
Optional Grass Catcher
Capacity
89 Gallons (392 liters)/
9.5 Bushels
89 Gallons (392 liters)/
9.5 Bushels
9
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Specifications
AIR COOLED
MT (20.0 HP)
MTEFI (26.0 HP)
LIQUID COOLED
MTL (25.0 HP)
MODEL
GHS SYSTEM (Optional) (continued)
Full Signal (Grass-Pak® Switch)
Oscillating Vane Switch
Mounted on Grass Delivery
Spout Triggers Horn Signal
Oscillating Vane Switch
Mounted on Grass Delivery
Spout Triggers Horn Signal
Powerfil ®
Oscillating Delivery Spout
Driven by 12 Volt Electric
Gearmotor Spreads Material
throughout Interior of Catcher
@ 25 Cycles/Minute
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
Contour-Molded, with Nylon
Backed Vinyl Cover and
Integral Foam Cushion
FRAME/BODY CONSTRUCTION
Frame
All Welded Unitized Steel
Chassis
All Welded Unitized Steel
Chassis
Body
14 Gauge Steel
11 Gauge Steel
14 Gauge Steel
11 Gauge Steel
Deck
GHS Catcher and Chutes
Molded Cross-Linked
Polyethylene (UV Stabilized)
Molded Cross-Linked
Polyethylene (UV Stabilized)
NOTE: The manufacturer reserves the right to make changes in specifications shown herein at any time
without notice or obligation.
10
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Component Identification
NOTE: Control Identification
shown in Operating
Instructions section.
Catcher Door
Safety Latch
Turbine
Precleaner
Grass Handling System
9.5 Bushel Catcher (Optional)
7.0 Bushel Catcher Standard
(Not Shown)
Tilt-Up
Latch
Spring Clip
Transmission Control Rod
Adjustment Nut (LH)
Anti-Scuff
Roller
Deck Support Pins
and Height Adjustment
Hitch Pins
Catcher Lift /
Dump Handle
Fuel Tank
and Cap
Counterweight Spring
and Protective Cover
Transmission Control Rod
Adjustment Nut (RH)
Deck Lift Handle
(Cutting Height Adjustment)
Footrests
Deck Support Arms
Tilt-Up
Hook
Deck
Caster Wheels
Tilt-Up
Deck Handle
Front View and Right Side View
11
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Component Identification
Removable Grass
Catcher Screen
(Not Visible)
Catcher Door
Gas Spring
Catcher Exhaust
Deflector
Gas Spring
Cover
Catcher Lift /
Dump Handle
Instrument Panel
Guard
Catcher
Door
Instrument Panel Box
(Shock Mounted)
Dump
Plate
Catcher
Door Handle
Tailpipe
Muffler
Oil
Filter
Anti-Scuff
Roller
Fuel
Filter
Left Hand
Drive Wheel
Oil Drain
Plug
Tailwheel Fork
and Wheels
Rear View and Left Side View
12
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Component Identification
Model MT
Air Intake
Plenum
Air Cleaner
Cover
Fuel Filter
Fuel Pump
Donaldson Air Cleaner
Air Restriction Indicator
Muffler Grass
Shield
Throttle and
Choke Linkage
Fuel Pickup
Line
Air Intake Hose
Muffler Heat
Shield
Fuel Tank
Oil Dipstick/Oil Fill
Rubber Bumper
(Catcher Support)
Precleaner
Tube
Muffler
Jackshaft
20 Amp Fuse
(Starter Solenoid)
PTO Gearbox
Dipstick
Turbine
Precleaner
GHS Blower
RH Transmission
Lockout Lever
RH Hydrostatic
Transmission
30 Amp
Circuit Breaker
Neutral Safety
Switch
LH Hydrostatic
Transmission
PTO
Clutch Lever
Positive (+)
Battery Cable
Battery
Negative (-)
Battery Cable
LH Transmission
Lockout Lever
Top View (Engine Compartment) Model MT
13
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Component Identification
Model MTL
Fuel
Filter
Air Cleaner
Cover
Overflow Muffler
Tank
Overflow
Hose
Muffler
Shield
Tailpipe
Donaldson
Air Cleaner
Radiator
Hose
Low Idle
Adjustment Screw
Throttle and Choke
Linkage
Air Restriction Indicator
Fuel Pickup
Line
Radiator Cap
Air Intake Hose
Fuel Tank
Oil Dipstick/
Oil Fill
Precleaner
Tube
Radiator
Radiator
Guard
Air Intake
Plenum
Water
Pump
Top View (Engine Compartment) Model MTL
14
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Component Identification
Model MTEFI
Air Cleaner Cover
Fuel Pump
Fuel Line to Engine
(High Pressure)
Donaldson Air Cleaner
Cylinder Head
Temperature Switch
Muffler Grass
Shield
Air Restriction Indicator
Throttle Linkage
Fuel Pickup Line
Fuel Return Line
Air Intake Hose
Oil Dipstick/Oil Fill
Muffler
Rubber Bumper
(Catcher Support)
Fuel Tank
Precleaner
Tube
Ignition
Coil
Air Intake
Plenum
Top View (Engine Compartment) Model MTEFI
15
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Safety Instructions
Pay particular attention to any information labeled
DANGER, WARNING, CAUTION, IMPORTANT,
and NOTE in this manual.
Walker Manufacturing cannot predict every poten-
tially 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.
When you see the Safety Alert Symbol (
),
read, understand, and follow the instructions. Fail-
ure to comply with safety instructions may result in
personal injury.
The Walker Rider Lawnmower has been designed
withmanysafetyfeaturestoprotecttheoperatorfrom
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 in-
jury or damage to equipment or property.
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 warn-
ing is ignored and proper safety precau-
tions are not taken.
If you have any questions concerning setup, opera-
tion, 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 operat-
ing 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:
WARNING
A POTENTIAL hazard that COULD result in
severe personal injury or DEATH, if warn-
ing is ignored and proper safety precau-
tions are not taken.
Walker Manufacturing Company
5925 East Harmony Road
Fort Collins, CO 80528
CAUTION
2. Never allow children to operate rider mower.
Do not allow adults to operate without proper
instruction.
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 pre-
cautions are not taken.
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 and pets, a
safe distance away from the area being mowed.
Do not mow with bystanders in the area.
IMPORTANT: Identifies mechanical information de-
manding special attention, since it deals with the pos-
sibility of damaging a part or parts of the machine.
5. Do not operate the machine barefoot or wearing
sandals, sneakers, tennis shoes, or similar light-
weight footwear. Wear substantial protective
footwear.
NOTE: Identifies information worthy of special
attention.
16
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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.
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.
7. Prolonged exposure to loud noise can cause im-
pairment or loss of hearing. Operator hearing
protection is recommended; particularly for
continuous operation of the GHS Model due to
blower noise level. Wear a suitable hearing pro-
tective device, such as earmuffs or earplugs.
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 op-
erate the tractor without a deck or implement
installed.
8. Keep all protective shields and safety de-
vices in place. If a protective shield, safety
device, or decal is damaged, unusable, or miss-
ing, repair or replace it before operating the ma-
chine.
3. For a beginning operator, learn to steer (ma-
neuver) the tractor with a slow engine speed
before attempting any mowingoperation. Be
aware that, with the front mounted mower con-
figuration, the back of the tractor swings to the
outside during turns.
9. Be sure interlock switches are functioning
correctly, so the engine cannot be started un-
less the Forward Speed Control lever is in the
NEUTRAL-PARK position, and the PTO clutch
is in the DISENGAGED position. Also, the en-
gine should stop if the operator lifts off the seat
with the PTO clutch in the ENGAGED position.
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. Handle gasoline with care. Gasoline is highly
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-PARK posi-
tion. When the machine is stopped or moving
slowly, engage the parking brake.
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.
NOTE: The emergency stop procedure is
exactly the same procedure as used to nor-
mally stop and park this machine.
d. Always fill the fuel tank outdoors using care.
Filltoaboutoneinchfromthetopofthetank.
Use a funnel or spout to prevent spilling.
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 con-
trols are in the OPERATING position).
e. Replace the machine fuelcapandcontainer
cap securely and clean up any spilled fuel
before starting the engine.
7. Do not run the engine in a confined area with-
out adequate ventilation. Exhaust fumes are
hazardous and can be deadly.
11. Never attempt to make any adjustments
whiletheengineisrunning, exceptwherespe-
cifically instructed to do so.
8. Do not carry passengers - maximum seating
capacity is one (1) person.
17
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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.
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.
10. Avoid sudden starts 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 roadways.
18. In case of a clogged or plugged mower deck
or GHS catching system:
11. Disengage the blade drive when transporting
the machine across drives, sidewalks, etc. Ne-
ver raise the mower deck while blades are
rotating.
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.
12. The maximum recommended side slope op-
erating angle is 20 degrees or 33% grade.
When operating the machine on a slope, reduce
speed and use caution to start, stop, and ma-
neuver. To prevent tipping or loss of control of
the machine, avoid sharp turns or sudden
changes in direction.
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. To prevent accidental starting, disconnect
the spark plug wires. Thoroughly inspect the
mower and repair any damage before 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).
13. Never adjust cutting height with the engine
running. Before adjusting cutting height or ser-
vicing, 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.
14. For side discharge mower decks, do not oper-
ate with the grass deflector chute removed.
Keep the deflector in the lowest possible posi-
tion.
20. Do not touch the engine or muffler while the
engineisrunningorimmediatelyafterstopping
the engine. These areas may be hot enough to
cause serious burns.
15. For tractors equipped with tilt-up deck, observe
21. When leaving the machine unattended, dis-
engage the blade clutch (PTO), stop the en-
gine, and remove the key.
the following recommendations:
a. Do not move tractor with deck in tilt-up po-
sition.
22. For Model MTL, never remove the radiator
pressure cap when the engine is hot (hot
water may spray and cause burns).
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 dis-
charge chute or the back of the grass catcher.
MAINTENANCE
1. To prevent accidental starting of the engine
when servicing or adjusting the machine, re-
move the key from the ignition switch and dis-
connect the spark plug wires.
18
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Safety Instructions
2. To reduce fire hazards, keep the engine free of
c. Keep sparks, flames, and smoking materi-
als away from the battery at all times. To
avoid sparks, use care when removing bat-
tery cables from posts.
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 nuts frequently, mak-
ing sure they are tight.
d. Disconnect both battery cables before
unplugging any wiring connectors or mak-
ing repairs on the electrical system.
4. Perform only maintenance instructions de-
scribed in this manual. Unauthorized main-
tenance operations or machine modifications
may result in unsafe operating conditions.
IMPORTANT: Keep all applicable manuals
immediately accessible to anyone who may
operate or service this machine.
5. If the engine must be running to perform a main-
tenance adjustment, keep hands, feet, and
clothing away from moving parts. Do not wear
jewelry or loose clothing.
6. Always use the proper engine service man-
ual 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, perfor-
mance, durability, or use will VOID the warran-
ty 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 parts.
Substitute parts may result in product malfunc-
tion and possible injury to the operator and/or
others.
11. Use care when charging the battery or per-
forming maintenance on the battery and electri-
cal 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.
19
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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.
Adjacent to Blower Discharge Chute
Each End of Mower Deck (5808 All Decks Except 52, 56, 74)
through Body (5804)
(5808-1 52, 56, 74 Decks)
SD Deck Discharge Shield (5848)
Hydrostat Oil
Reservoir (5810-2)
Front Body Adjacent to
RH Steering Lever (7818)
Engine Shroud (5855)
On Body Adjacent to Clutch
Control Lever (5806)
Rear Cross Member of Front Body (8825)
Battery Hold-Down Bar (MTEFI only, 5844-2)
Right Side of Front Body, Below
Front Body Latch Release (7820)
Rear of Grass Catcher Exhaust Screen (5869)
20
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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.
Jackshaft Support Adjacent
to Dipstick (7827)
Deck Gearbox Cover (5807-3)
Deck Carrier Frame (8647)
Gear Axle (5810-1)
Deck Carrier Frame (8653)
On Engine (6810)
Deck Carrier Frame (5865)
Catcher Safety Latch,
RH Side (5874)
Right Side, Below Operator Seat (7809)
Left Side of Operator Seat (8819)
Top of Blower Housing (5819)
Catcher Door Hinge Bar,
LH and RH Sides (5868)
Left Side of Operator Seat (7819)
Instrument Panel MT (8823-2), MTEFI (8823-3), MTL (8823-4)
Fender, RH Side (7802)
21
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Assembly Instructions
SETUP INSTRUCTIONS
Raise front mower body up for battery access (refer
to Front Body Latch Release in Operating Instruc-
tions). Check the battery for electrolyte level and
charge. The electrolyte level should be at the bot-
tom 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.
Walker Mowers are shipped partially assembled.
After uncrating the tractor and mower deck, initial
setup is required.
NOTE: During the process of unpacking, any dam-
aged or missing parts should be noted and reported
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.
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 cre-
ated by damage to critical working parts and safety
systems.
Tire Installation (Tractor)
• Install the drive tires using the eight (8) lug bolts
that are supplied with the owner’s packet of materi-
als. Bolts are torqued to 75 to 85 ft-lb. Drive tires are
18 x 9.50-8, 4-ply; rear tires are 13 x 5.00-6, 4-ply.
Wet Battery Service
• Check and adjust the inflation of the tires. The
tire inflation recommendations are:
If the battery has been shipped wet, but the electro-
lyte level is low or the battery needs to be charged
then:
Drive = 15 PSI (103 kPa)
Rear = 20 PSI (137 kPa)
Battery Service
1. Fill each battery cell with drinking water to the
bottom of the vent wells.
CAUTION
2. Charge battery. Refer to Battery Charging in
Important Battery Service, Installation, and
Changing Tips for MTEFI:
this section.
Dry Battery Service
• Do not allow the battery cables to touch
opposing terminals. When connecting
battery cables attach the positive (+) cable
topositive(+)batteryterminalfirst,followed
by negative (-) cable to negative (-) battery
terminal.
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 techni-
cian can activate the battery safely. DO
NOT attempt to activate the battery unless
you are experienced in battery service
work. The following activation and charg-
ing instructions are provided for use by a
trained battery technician.
• Never start the engine when the cables
are loose or poorly connected to the
battery terminals.
• Never disconnect battery while engine is
running.
• Never use a quick battery charger to
start the engine.
• Never "jump start" the engine using
anothersource. Electricity fluctuationscan
damage the ECU (Electronic Control Unit).
• Do not charge battery with key switch
"on."
• Always disconnect negative (-) battery
cable lead before charging battery, and
also unplug harness from ECU before per-
forming any welding on equipment.
22
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Assembly Instructions
Battery Charging
DANGER
DANGER
Battery electrolyte is a poisonous and cor-
rosive sulfuric acid solution.
BATTERIES PRODUCE EXPLOSIVE GASES
• Avoid spillage and contact with skin,
• Charge the battery in a well-ventilated
area, so that gases produced while charg-
ing can dissipate.
eyes, and clothing - causes severe burns.
• To prevent accidents, wear safety gog-
gles and rubber gloves when working with
electrolyte.
• Keep sparks, flames, and smoking mate-
rials away from the battery at all times.
• Neutralize acid spills with baking soda
and water solution.
• Make sure the battery cap vents are
open after the battery is filled with acid
(check manifold vent on each cap).
To fill (activate) battery with electrolyte (if battery has
been shipped dry):
• Make sure the battery charger is unplug-
ged before connecting or disconnecting
cables to the battery.
1. Remove the battery hold down bar, disconnect
the battery cables and lift the battery out of the
tray.
1. Charge the battery at 15 amps for 10 minutes.
DO NOT exceed 20 amps maximum recom-
mended charging rate. Charge until specific
gravity is at least 1.250. Total charging time
should not exceed one (1) hour.
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 spe-
cific gravity to activate the battery. DO NOT use
water or any other liquid during initial activation.
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].
2. Remove the filler caps and carefully fill each cell
until the electrolyte is just 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. After the battery is filled with electrolyte, replace
the filler caps and charge the battery. Refer to
Battery Charging.
3. Install battery.
Battery Installation
IMPORTANT: Makesurebatteryissecurelymount-
ed in the frame. A loose battery may cause damage
to the case resulting in acid leakage and severe dam-
age 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 nega-
tive cables to the proper battery terminal (red cable
and boot connects to the Positive (+) terminal).
Slide the rubber boot up and over the battery post,
making sure it covers the post completely to pre-
vent an electrical short.
23
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Assembly Instructions
Grease Fitting
Locations
WARNING
Make sure the battery cap vents are open.
Improper venting of the battery COULD
cause a battery explosion.
Spacer Washer
Axle Spacer Tube
Deck Caster Wheel Installation
Battery Clamp
Secured by
Wing Nut(s)
(+) Battery Cable
Connection
NOTE: If semi-pneumatic wheels are installed,
make sure the spacer washers fit overthe spacer
tube and are not caught between the fork and the
end of the tube. The washers should move freely
on the axle spacer tube.
Battery Protector
Plate in Place
Battery Installation
Mower Deck Assembly
5. Grease the caster wheel bearings and caster
pivot bearings - one grease fitting for each wheel
and each pivot.
Deck Caster Wheels Installation
Deck Discharge Chute Installation
(GHS Rear Discharge Models Only)
1. Remove the bolt, nut, axle spacer tube, and
spacer washers from each deck caster wheel
fork.
Mount the discharge chute hinge on top of 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 nut on
the outside. Attach spring for tilt-up action from
chute to bracket on deck.
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.
Carrier Frame
Tube Sockets
Attach
Chute
Attach Guard
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.
Nut on Top
Discharge Chute and PTO Shaft Guard
Installation on Rear Discharge Deck
24
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Assembly Instructions
Deck Discharge Shield Installation
(Side Discharge Models Only)
Attach Spring
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
Roller Wheels
DO NOT operate the machine without the
grass deflector chute attached and in the
lowest possible position.
Tilt-Up Spring and Roller Wheel
Installation on Rear Discharge Deck
Mower Deck lnstallation on Tractor
Attach Shield
Deck Installation
1. Lightly grease each deck support arm (2) on the
tractor. Refer to Mower Deck Installation pho-
to on next page for location of deck support arm.
2. Engage the deck carrier frame tube sockets on
the tractor support arms (refer to Discharge
ChuteandPTOShaftGuardInstallationphoto
forsocketlocation). Slidethedeckontothesup-
port arms: all the way if SD equipped model,
approximately 3 in. (76 mm) if GHS equipped
model.
Discharge Shield Installation
on Side Discharge Deck
NOTE: When installing the DSD52 or DSD62
Mower deck, make sure to retract the dolly
wheel after mounting the deck on the tractor.
PTO Shaft Guard Installation
Position the shaft guard and mount with two 1/4-20
x 1/2 in. bolts.
3. If the deck is rear discharge (GHS equipped
model), the rear discharge chute will need to be
aligned and connected to the blower inlet dur-
ing the last 2 in. (51 mm) of slide action on the
support arms.
Tilt-Up Roller Wheel Installation
Mount the two (2) tilt-up roller wheels on the brack-
ets 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.
NOTE: Raising the mower body may be help-
ful in fitting and guiding the deck chute into the
blower.
4. Install the hitch 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) hitch pins are included in
the owner’s packet of materials.
25
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Assembly Instructions
5. Connect the mower deck PTO drive shaft
assembly to the tractor with the splined quick
disconnect coupler. This coupler simplifies
shaft alignment and installation.
6. Raise the front mower body (instead of lifting
the front of deck) and clip the counterweight
springs to the receptacle on front of body.
Lower the front body to tension the springs.
(Refer to Deck Counterweight Spring Instal-
lation Photo.)
a. Use the arrows on the shaft and tube to
align and slide the PTO quick coupler onto
the deck spline shaft.
Grease Deck
Support Arms
b. Reaching under the tractor, pull the ring
back on the coupler, slide onto the spline
shaft on the tractor, and release the ring.
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.
PTO Connection
Arrows on Shaft and Tube
(used to align when sliding together)
Pull Back Spring-Loaded
Coupler Ring
Mower Deck Installation
(PTO Shaft Connection)
7. With the counterweight springs connected, the
weight on the deck caster wheels should be
15 to 25 Ib (7 to 11 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 Installa-
tion photo.
Installing PTO Quick Coupler
Spring Tension Adjustment
Nut Located Under Lower
Spring Hook (Not Visible)
Spring-Loaded Coupler Ring
In Fully Forward Position
Counterweight Springs Clip
Onto Body With Forward
Body Tilted Up
Hitch Pins
Lock Deck On
Support Arms
Coupler Ring “Locked” Position
Deck Counterweight Spring Installation
26
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Assembly Instructions
2. Check the side-to-side level. Rotate each blade
sideways and measure the distance from blade
tip to ground on each side. If measurements
vary more than 1/8 in. (3 mm), add a washer
shim under the decksupport pins on the low side
to level the deck.
Deck Leveling
1. Position mower on a smooth, level surface. Set
the cutting height to the highest position - 4 in.
(102 mm) - for easy access under the deck to
measure blade height. Refer to ADJUSTING
CUTTING HEIGHT in Operating Instructions.
3. Check the front-to-rear level. Rotate the blades
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; shim the
rear (or front) deck support pins equally to
achieve at least 1/8 in. (3 mm) difference.
NOTE: A block of wood cut 4 in. (102 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.
NOTE: The mower deck and support frame
are jig welded; within normal tolerances, very lit-
tle, if any, shimming should be required to level
the deck. Tire pressure will influence the level-
ness of the deck. Check the tire pressure as a
possible cause of the deck not being level.
4 in. (102 mm)
Wood Block
Should be 1/8 in. (3 mm)
to 1/4 in. (6 mm) higher
at the rear of the blade
Should not vary more
than 1/8 in. (3 mm)
side-to-side
4 in. (102 mm)
Wood Block
Deck Leveling
27
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Assembly Instructions
PREOPERATING CHECKLIST
IMPORTANT: DO NOT mix oil with gasoline. Al-
ways use fresh, automotive grade gasoline. DO
NOT use premium, white, or high-test gasoline. DO
NOT use additives, such as carburetor cleaners, de-
icers, or moisture removing agents. DO NOT use
gasoline blended with methyl alcohol.
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 ev-
ery day, but the operator should be aware of the con-
dition of each.)
CHECK ENGINE CRANKCASE OIL LEVEL
Check the engine crankcase oil level before use and
after each 5 hours of continuous operation. Refer
to LUBRICATION for Checking Engine Crankcase
Oil Level in Maintenance Instructions.
For proper fuels and lubricants refer to Specifica-
tions.
FILL FUEL TANK
CHECK AND SERVICE ENGINE AIR CLEAN-
ER SYSTEM
Fill the fuel tank using clean, fresh automotive
grade unleaded gasoline (87 octane rating mini-
mum).
• Check air restriction gauge to make sure there is
no red indication showing.
• Check condition, cleanliness, and security of the
complete air cleaner system (clean air filter
every 100 hours). For detailed procedures,
refer to CLEANING the Engine Air Cleaner
System in Maintenance Instructions.
DANGER
Handle gasoline with care. Gasoline is
highly flammable and its vapors are ex-
plosive. Use safe refueling procedures:
ADJUST CARBURETOR (Initial Start-up Only)
• DO NOT fill fuel tank with the engine run-
ning.
For Model MT and MTL, refer to ADJUSTMENTS of
Carburetor in Maintenance Instructions.
• If the engine is hot, allow to cool before
refueling.
CHECK ENGINE COOLING SYSTEM - Model
MT and MTEFI
• Use an approved fuel container.
• Fuel the mower outdoors.
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 ac-
cess panels to inspect and clean].
• DO NOT smoke while refueling.
• Avoid spilling fuel; use a funnel or spout.
• DO NOT overfill the fuel tank; fill up to
about 1 in. (25 mm) below the top of tank.
Check performance of the cooling system by start-
ing the engine, holding a hand adjacent to the cylin-
der heads, and feeling the cooling airflow.
IMPORTANT: DO NOT permit dirt or other foreign
matter to enter the fuel tank. Wipe dirt from around
the filler cap before removing. Use a clean fuel stor-
age container and funnel.
DANGER
Make sure to keep hands clear of exhaust
pipe, muffler, and moving parts when
checking airflow.
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Assembly Instructions
CHECK ENGINE COOLING SYSTEM - Model
MTL
CHECK AND CLEAN GRASS BUILDUP UN-
DERNEATH MOWER DECK (and inside GHS
blower, if equipped)
• Check the radiator air intake screen to make
sure the screen is clean and free of obstruction.
Also, the radiator cooling fins should be inspect-
ed and cleaned if there is any buildup of dirt or
debris. (Remove the intake screen assembly to
inspect and clean.)
Refer to CLEANING the GHS Blower in Mainte-
nance Instructions for blower cleaning information.
DANGER
• Check the coolant levels in the radiator and over-
flow tank. If additional coolant is needed, refer to
CHECKING/SERVICING the Engine Cooling
System in Maintenance Instructions.
Never operate cutter blades with deck in
raised position because it is hazardous.
The tilt-up deck can be secured in the raised position
by unlocking the deck lock levers on each side of the
carrier frame and inserting the deck hook into the tilt-
up latch on the tractor body. Before operating the
tractor, make sure to re-engage the deck lock levers
after lowering the deck to the normal operating po-
sition.
WARNING
DO NOT remove the radiator pressure cap
when engine is hot.
CHECK GEAR AXLE OIL LEVEL
Tilt-Up Latch
Refer to Gear Axle Lubrication in Maintenance In-
structions.
INSPECT FOUR (4) DRIVE BELTS
Tilt-Up Latch
Engine PTO Drive, Jackshaft Drive, Hydrostatic
Ground Drive, and GHS Blower Drive (if equipped).
Tilt-Up Hook
on Deck
CHECK HYDROSTATIC TRANSMISSION OIL
LEVEL
Refer to LUBRICATION for Checking Hydrostatic
Transmission Fluid Level in Maintenance Instruc-
tions.
Deck Lock Lever
Deck Secured in TILT-UP Position
CHECK BATTERY ELECTROLYTE LEVEL
CAUTION
Refer to CHECKING/SERVICING the Battery in
Maintenance Instructions.
Do not operate machine with deck tilt-up
pivot joint unlocked.
CHECK FUNCTIONS OF INSTRUMENT PANEL
AND WARNING HORN
Turn the ignition key to the RUN position. Voltmeter,
Oil Pressure Light, and Warning Horn should all op-
erate, indicating normal function.
DANGER
Do not operate the mower with deck in tilt-
up position. Do not move the tractor with
the deck in the tilt-up position.
CHECK TIRE PRESSURE
Deck Caster Wheel = 20 PSI (137 kPa)
Drive
=
15 PSI (103 kPa)
Rear
=
20 PSI (137 kPa)
29
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Assembly Instructions
CHECK MOWER BLADE CONDITION, SHARP-
NESS, AND SECURITY OF MOUNTING
The blade mounting nut should be tightened to
60 ft-lb (81.3 N m). If blade sharpening is required,
refer to CHECKING/SERVICING for Sharpen
Mower Blades in Maintenance Instructions.
ADJUST MOWER CUTTING HEIGHT, IF RE-
QUIRED
Position the hitch pins in the four deck support pins.
Refer to the “Cutting Height Adjustment” decal on
the deck gearbox cover.
PERFORM ANY ADDITIONAL PROCEDURES
called for on the MAINTENANCE SCHEDULE
CHART in Maintenance Instructions.
30
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Operating Instructions
CONTROL IDENTIFICATION, LOCATION, AND
FUNCTION
Engine Choke - (Model MT and MTL only)
The choke control lever (black knob) is located on
the left side of the seat. To start a cold engine, move
the choke control forward to the ON position. After
engine starts, move the choke control toward the
OFF position, keeping enough choke to allow the
engine to run smoothly as it warms up. As soon as
possible, move the choke to the OFF position. A
warm engine requires little or no choke for starting.
Operating Controls
CAUTION
Before operating the mower, become fa-
miliar with the location and function of all
operator controls. Knowing the location,
function, and operation of these controls
is important for safe and efficient opera-
tion of the mower.
IMPORTANT: Make sure the choke is in the OFF
position during normal engine operation; running
with the choke in the ON position CAN damage the
engine.
Forward Speed Control
(FSC)
Steering Levers
Parking
Brake
Front Body
Latch Release
Blade Clutch (PTO)
Operating Controls
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Operating Instructions
Steering Levers
Each drive wheel is controlled by its own indepen-
dent steering lever, for both steering function and
FORWARD/REVERSE motion. The FSC lever sets
the maximum forward speed, and also sets the for-
ward position of the steering levers. The steering le-
vers operate only with a backward pulling
movement of the lever, which causes the drive
wheel for that lever to first slow down, stop, and then
reverse with a full backward lever stroke. The levers
are released to the FORWARD position for “straight-
ahead” ground travel.
Choke
Throttle
NOTE: Pushing forward on the steering levers will
not cause any change in tractor motion - there will
be no steering lever reaction and there will be no
machine damage.
Choke and Throttle Location (MT and MTL)
Engine Throttle
The throttle control lever (red knob) is located on the
left side of the seat and is used to control engine
speed. Moving the lever forward toward the FAST
position increases engine speed; moving it back-
ward toward the IDLE position decreases engine
speed.
Blade Clutch (PTO)
The blade clutch lever has two positions. Pulling the
lever UP engages the PTO that drives the mower
blades. Pushing the lever DOWN disengages the
PTO and engages the blade brake.
Forward Speed Control (FSC)
NOTE: On GHS equipped models, the Powerfil ®
motor and Grass-Pak® full signal switch are activat-
ed by engaging the blade clutch. Refer to Using the
GHS Catcher in this section for a complete descrip-
tion of GHS operation.
Forward Speed Control (FSC) has two functions:
One is to set forward travel speed, and the other is
to establish the NEUTRAL-PARK position. When
the FSC lever is moved into the FORWARD posi-
tion, a friction lock holds any forward speed setting
from 0 to 5 mph (0 to 8 km/h). The ground speed is
proportional to the lever position; the further the le-
ver is advanced forward, the faster the tractor
moves. It is not necessary to hold the FSC in posi-
tion since the friction lock maintains the selected le-
ver position. Pulling back on the steering levers
overrides the FSC setting and slows or stops for-
ward travel. Releasing the steering levers allows
the tractor to resume forward travel at the speed set
by the FSC lever. To stop and park the machine, the
FSC lever is moved backward to the NEUTRAL-
PARK position.
Parking Brake
The parking brake functions by locking a pin into the
hydrostatic transmission pinion gear teeth. Moving
the lever FORWARD engages the parking brake;
moving the lever BACKWARD releases the brake.
IMPORTANT: Stop the tractor completely before
engaging the parking brake. The parking brake uses
a positive mechanical lock similar to the PARK po-
sition on an automotive automatic transmission. If
the tractor is moving when the brake is engaged, it
will result in sudden stoppage and possible internal
damage to the axle drive.
NOTE: If pressure on the parking brake pin (e.g.
parked on a hill) makes it impossible to release the
parking brake with the parking brake lever, move the
mower gently forward or backward to release the
pin.
32
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Operating Instructions
The Forward Speed Control also Establishes the Neutral-Park Position of the Steering Levers
LEFT WHEEL
STEERING LEVER
RIGHT WHEEL
STEERING LEVER
FORWARD SPEED
CONTROL LEVER (FSC)
Full Forward
Ground Speed
Position
Forward Position
(No Control Change)
Intermediate
Ground Speed
Position
Neutral-Park
Position
Reverse Drive
Wheel Motion
Position
Neutral-Park
Position
Engaged
Position
PARKING
BRAKE
Disengaged
Position
MTL
MTEFI
MT
Disengaged
Position
Fast
Throttle
Position
Idle
Position
THROTTLE
ON Position
OFF Position
Engaged
Position
BLADE CLUTCH (PTO)
Pull Up to Engage
CHOKE (MT & MTL)
MT, MTEFI, and MTL Operating Controls (Top View from Drivers Point of View)
33
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