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WA20-2
Komatsu WA20-2 User Manual
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2-1
OPERATION
39
41
Table of Contents
Table of Contents
7
1 Foreword
2
2 Safety Information
3
3 Introduction
4
4 Location of Plates, Table to Enter Serial No. and Distributor
5
Table of Contents
7
Safety
10
6 General Precautions
11
7 Precautions During Operation
16
Before Starting Engine
16
Operating Machine
18
Transportation
23
Battery
24
Towing
25
8 Precautions for Maintenance
26
Before Carrying out Maintenance
26
During Maintenance
30
Tires
34
9 Position for Attaching Safety Labels
36
Operation
40
10 General View
41
General View of Machine
41
General View of Controls and Gauges
42
11 Explanation of Components
43
Meter, Lamps
43
Switches
47
Control Levers, Pedals
49
Cap with Lock
53
Safety Bar
53
Tilt Hood
54
Towing Pin
54
Fuse
54
Fusible Link
55
Manual Pocket
56
Connectors
56
12 Operation
57
Check before Starting Engine
57
Starting Engine
68
Operations and Checks after Starting Engine
71
Moving Machine off
73
Changing Direction
75
Turning
75
Stopping Machine
76
Operation of Work Equipment
77
Work Possible Using Wheel Loader
78
Precautions for Operation
82
Adjusting Work Equipment Posture
84
Parking Machine
85
Checks after Completion of Operation
86
Stopping Engine
87
Check after Stopping Engine
87
Locking
87
Handling the Tires
88
13 Transportation
91
Loading, Unloading Work
91
Precautions for Loading
92
Lifting Machine
92
Precautions for Transportation
95
Removing and Installation of Canopy
95
14 Cold Weather Operation
97
Precautions for Low Temperature
97
Precautions after Completion of Work
99
After Cold Weather
99
15 Long-Term Storage
100
Before Storage
100
During Storage
100
After Storage
100
16 Troubleshooting
101
When Machine Runs out of Fuel
101
Towing the Machine
102
If Battery Is Discharged
105
Other Trouble
109
Maintenance
114
17 Guides to Maintenance
115
18 Outlines of Service
118
Outline of Oil, Fuel, Coolant
118
Outline of Electric System
121
19 Wear Parts List
122
20 Use of Fuel, Coolant and Lubricants According to Ambient Temperature
123
21 Standard Tightening Torques for Bolts and Nuts
127
Introduction of Necessary Tools
127
Torque List
129
22 Periodic Replacement of Safety Critical Parts
130
23. Maintenance Schedule Chart
137
23 Maintenance Schedule Chart
137
Maintenance Schedule Chart
139
Service Item Page
139
24 Service Procedure
140
Initial 250 Hours Service
140
INITIAL 250 HOURS SERVICE (Only after the First 250 Hours)
140
Change Oil in Engine Oil Pan, Replace Engine Oil Filter Cartridge
140
Replace Hydraulic Tank Filter Element and HST Filter Element
140
Check Engine Valve Clearance, Adjust
140
When Required
141
Replace Air Cleaner Element
141
Clean Inside of Cooling System
142
Drain Water and Sediment from Fuel Tank
146
Drain Water from Water Separator (WA30, 40, 50)
146
Check Transfer Case Oil Level, Add Oil
147
Check Axle Oil Level, Add Oil
148
Clean Transfer Case Breather
149
Clean Radiator Fin
150
Replace Bolt-On Cutting Edge (Option for WA20)
151
Adjust Parking Brake
152
Adjust Parking Brake Release Lever
153
Adjust Brake Pedal Stroke
154
Check before Starting
155
Check Bulb of Pilot Lamp
155
Check Coolant Level, Add Water
155
Check Fuel Level, Add Fuel
156
Check Oil Level in Engine Oil Pan, Add Oil
157
Check Parking Brake Alarm Buzzer
158
Check Effect of Parking Brake and the Pedal Stroke
158
Check Travel of Parking Brake Release Lever
158
Check Effect of Brake and the Pedal Stroke
158
Check Steering Wheel Play and Operation of Steering
158
Check Electric Wiring
159
Check Sound of Horn
159
Check Flashing of Lamps, Check for Dirt or Damage
160
Check Engine Exhaust Color and Sound
160
Check Operation of Gauges
160
Check Direction of Rear View Mirror, Check for Dirt or Damage
160
Every 50 Hours Service
161
Check Tire Inflation Pressure
161
Clean Air Cleaner Dust Cup
161
Every 250 Hours Service
162
Lubricating
162
Bucket Link Pin (2 Points)
162
Bucket Pin (2 Points)
162
Tilt Lever Pin (1 Point)
162
Lift Cylinder Pin (4 Points)
162
Dump Cylinder Pin (2 Points)
162
Lift Arm Pivot Pin (2 Points)
162
Steering Cylinder Pin (2 Points)
162
Check Oil Level in Hydraulic Tank, Add Oil
163
Check and Clean Air Cleaner Element
164
Check Tension of Fan Belt, Adjust
165
Check Battery Electrolyte Level
166
Check for Loose Wheel Hub Bolts, Tighten
166
Every 500 Hours Service
167
Replace Fuel Filter Element
167
Change Oil in Engine Oil Pan, Replace Engine Oil Filter Cartridge
168
Grease Rear Axle Pivot Pin (2 Points)
169
Every 1000 Hours Service
170
Every 2000 Hours Service
173
25 Specifications
176
Options, Attachments
178
26 Optional Parts and Attachments
179
27 Seat Belt
180
Fastening and Removing Belt
180
Adjust Belt Length
181
Check Seat Belt and Mounts
181
28 Equipment with Cab
182
Switches
182
Rear Window
186
Check and Maintenance
187
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Komatsu WA20-2 Specifications
General
Engine Power
30.6 kW
Operating Weight
4700 kg
Bucket Capacity
0.6 m³
Overall Length
5.13 m
Overall Width
1.85 m
Overall Height
2.61 m
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