Description

Komatsu WA800-3 work shop manual. This is a factory work shop manual, 1224 pages.

Komatsu WA800-3 Wheel Loader---50001 and up

Service Repair Manual Covers:
Forward and safety
General
General assembly drawing.... .Ol-2
Specifications .............. 01-3
Weight table ................ 01-6
List of lubricant and water. 01-8

Structure and Function
Power train ..................10- 2
Power train system ...........10- 3
Engine control ...............10- 4
Servo cylinder ...............10- 5
Radiator and cooler ..........10- 9
Damper........................10-10
Torque converter and transmission piping .....10-11
Transmission hydraulic diagram ...............10-12
Transmission hydraulic
circuit diagram ..............................10-13
Torque converter .............................10-14
Transmission .................................10-19
Transfer .....................................10-27
Transmission control valve ...................10-28
Torque convertor oil cooler ..................10-46
Drive shaft ..................................10-47
Center support ...............................10-48
Axle..........................................10-49
Final drive ..................................10-54
Axle mount ...................................10-56
Center hinge pin..............................10-58
Tire and wheel................................10-59
Steering piping diagram ......................10-60
Steering column ..............................10-61
Joystick linkage .............................10-61-1
Steering pump.................................10-62
Switch pump ..................................10-64
Steering demand valve ........................10-66
Steering unit (Orbit-roll valve) .............10-77
Proportional solenoid valve ..................10-79-1
EPC valve ....................................10-79-2
Rotary valve .................................10-79-3
Tow-way restrictor valve .....................10-80
Diverter valve ...............................10-81
Brake piping .................................10-86
Brake circuit diagram.........................10-88
Brake valve ..................................10-90
Charge valve .................................10- 95
Accumulator (for brake) ......................10- 99
Slack adjuster ...............................10-100
Brake ........................................10-103
Parking brake ................................10-104
Spring cylinder ..............................10-106
Parking brake solenoid valve .................10-107
Hydraulic piping .............................10-108
Work equipment hydraulic circuit diagram .. ..10-112
Work equipment lever linkage .................10-115
Hydraulic tank ...............................10-116
Main piston pump..............................10-119
ES valve .....................................10-127
Servo valve ..................................10-129
PPC valve ....................................10-132
PPC relief valve .............................10-136
Accumulator (for PPC valve) ..................10-137
Work equipment control lever .............. 10-37-1
Work equipment EPC valve .................. ..10-137-4
Work equipment neutral lock
solenoid valve ...............................10-137-7
Main control valve ...........................10-138
Lubrication of work equipment ................10-152
Work equipment linkage .......................10-154
Bucket positioner and boom kick-out ..........10-156
Operation of proximity switch ................10-158
Cab...........................................10-162
ROPS canopy ..................................10-163
Air conditioner ..............................10-164
Electric circuit diagram .....................10-167
Machine monitor system........................10-168
Main monitor .................................10-170
Maintenance monitor...........................10-176
Multi monitor system (if equipped) ......... .10-177-1
Work equipment control system ......... ......10-177-23
Work equipment controller................... .10-177-29
Engine starting circuit ......................10-178
Engine stop circuit ..........................10-179
Preheating circuit ...........................10-180
Electric transmission control.................10-181
Kick-down, hold switch .......................10-184
Joystick steering system .....................10-184-1
AJSS (Advanced joystick
steering system) .............................10-184-6
Electric parking brake control ...............10-185

Testing and Adjusting
Standard value table
Standard value table for engine.............. 20- 2
Standard value table for chassis.. ...........20- 3
Standard value table for electrical parts ....20- 9
Testing and adjusting ........................20-101
Trouble shooting..............................20-201

Disassembly and Assembly..30-172 .............30-268
Maintenance Standard......40-2................40-56
Others Electric circuit diagrams...90-3.......90-35
And More......

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