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MDD (20.9 HP)
Walker MDD (20.9 HP) User Manual
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OWNER’S MANUAL
Safety
, Assembly
, Ope
rating, and Maintenance I
nstructions
Model MDD (20.9
HP Diesel)
Please Read and Save
These Instr
uctions
Effective Da
te:
12-01-0
3
For Safety
, Read All Safet
y and Op
eration
P/N 700
0-6
Instruc
tions Pr
ior to O
peratin
g Mac
hine
Price
$5.00
™
2
Table of Contents
Default Chapter
3
Table of Contents
3
General Information
5
Highlighted Information
5
Glossary
5
Identifying Number Locations
5
Engine Serial Number Location
6
Servicing of Engine and Drivetrain Components
6
Specifications
7
Engine
7
Electrical System
7
Transmission
7
Blade Drive
8
Tire Size
8
Tire Pressure
8
DIMENSIONS (Tractor and Mower)
9
Specifications
9
Mower Deck
9
Curb Weight
9
Drive Belts
10
GHS SYSTEM (Optional)
10
Seat
10
Frame/Body Construction
10
Component Identification
11
Safety Instructions
15
Before Operating
15
Operating
16
Maintenance
18
Safety, Control, and Instruction Decals
19
Assembly Instructions
21
Setup Instructions
21
Tire Installation (Tractor)
21
Battery Service
21
Wet Battery Service
21
Dry Battery Service
21
Battery Charging
22
Battery Installation
22
Mower Deck Assembly
22
Deck Caster Wheels Installation
22
Deck Discharge Chute Installation
23
Deck Discharge Shield Installation
23
PTO Shaft Guard Installation
23
Tilt-Up Roller Wheel Installation
23
Mower Deck Lnstallation on Tractor
24
Deck Installation
24
Deck Leveling
26
Preoperating Checklist
27
Operating Instructions
29
Control Identification, Location, and Function
29
Operating Controls
29
Engine Throttle
29
Forward Speed Control (FSC)
30
Steering Levers
30
Blade Clutch (PTO)
30
Parking Brake
30
Front Body Latch Release
30
Transmission Lockout Levers
31
Cold Start Lever (Jackshaft Drive Belt Release)
31
Instrument Panel
33
Voltmeter
34
Water Temperature Gauge
34
Oil Pressure Warning Light
34
Water Temperature Warning Light
34
Ignition Switch
34
Light Switch (for Optional Lights)
35
Hourmeter
35
Circuit Breakers
35
Warning Horn
35
Starting the Engine
35
Adjusting Ground Speed and Steering
37
Engaging the Mower
38
Stopping the Machine
39
Adjusting Cutting Height
39
Transmission Lockout
40
Recommendations for Mowing
41
Recommendations for Tilt-Up Deck Operation/Transport
42
Grass Handling System (Ghs)
43
General Information
44
Clogging Checklist
45
Using the Tilt-Up Deck
46
Using the GHS Catcher
46
Powerfil
46
Full" Signal Horn
46
Cleaning the GHS Exhaust Screen
46
Dumping the Catcher
47
Tailgate Dumping
47
Using the Dump Bag
47
Power Dump Option
48
Maintenance Instructions
50
Maintenance Schedule Chart
50
Important Tips for Care of the Kubota Engine
51
Fuel System
51
Starting/Stopping
51
Cooling System
51
Air Cleaner System
51
Oil
51
Lubrication
52
Engine Oil
52
Engine Break-In Oil
52
Checking Engine Crankcase Oil Level
52
Changing Engine Crankcase Oil/Oil Filter
52
Grease Fitting and Oil Point Lubrication
53
Mower Deck Gearbox Lubrication
56
DSD52 or DSD62 Mower Deck Lubrication
56
Tractor PTO Gearbox Lubrication
57
Checking Gearbox Oil Level
57
Changing Gearbox Oil
57
Gear Axle Lubrication
57
Hydrostatic Transmission Fluid
58
Checking Hydrostatic Transmission Fluid Level
58
Changing Hydrostatic Transmission Fluid
58
Cleaning
59
Engine Air Cleaner System
59
Turbine Precleaner
60
Donaldson Radialseal™ Air Cleaner
60
Engine Cooling System
62
Radiator Screen and Cooling Fins
62
Flushing Radiator and Changing Coolant
62
Grass Buildup in Mower Housing
62
GHS Blower
63
GHS Exhaust Screen
64
Hydrostatic Transmission Cooling Fins
64
Checking/Servicing
64
Engine Cooling System
64
Coolant Level
64
Fan Belt Tension
65
Security of Air Filtration Components
65
Battery
65
Electrolyte Level
65
Cleaning the Terminals
65
Charging the Battery
66
Tire Pressure
66
Sharpen Mower Blades
66
Drive Belts
67
Mower Deck Gearbox Oil Seals
67
Fuel Lines and Clamps
68
Radiator Hoses and Clamps
68
Engine Valve Clearance
68
Fuel Injection Nozzle Pressure
68
Fuel Valve Solenoid
68
Blade Brake Action
69
Replacing/Repairing
69
Drive Belts
69
Engine PTO Drive Belt
71
Jackshaft Drive Belt
72
GHS Blower Drive Belt
73
Hydrostatic Ground Drive Belt
74
Engine Fan Belt
75
Fuel Filter
76
Blade Overload Shear Bolts
76
PTO Shear Pin
77
Mower Blades
77
Mower Deck Gearbox Replacement
78
GHS Blower Assembly
79
GHS Blower Assembly Removal
79
Blower Wheel Removal
79
Blower Wheel Installation
80
GHS Blower Assembly Installation
80
Replacing Fuel Valve Solenoid
80
Adjustments
81
Safety Switches
81
Tail Wheel Bearing Preload
81
Steering Levers
81
Blade Clutch (PTO)
82
Clutch Disengagement/Brake Action
82
Clutch Engagement/Belt Tension
82
Transmission Control
83
Set Forward Travel Limit (Stop)
83
Steering Lever End Play Adjustment
84
Neutral Function Adjustment
84
Straight Ground Travel Adjustment
84
Forward Speed Control Friction Lock
85
Tilt-Up Deck Adjustable Stop
85
Fuel Valve Solenoid Linkage
85
GHS "Full" Signal Horn with Grass-Pak ® Switch
86
Troubleshooting (When Horn Fails to Operate)
86
Electrical System
87
Circuit Breakers
87
Wiring Diagram - Model MDD
88
Maintenance and Service Record Sheet
89
Operator's Notes
90
Warranty
91
4
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Walker MDD (20.9 HP) Specifications
General
Engine Power
20.9 HP
Manufacturer
Walker
Fuel Type
Gasoline
Cutting Width
48 inches
Deck Material
Steel
Transmission
Hydrostatic
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