Komatsu WA75-3 Wheel Loader Repair Manual

Shop Manual: 252 pages & 422 pages (2 versions)
Parts Catalog: 232 pages
Serial Number:
WA75-3 HA300051 and up
WA65-3 – HA940051 and up
WA65-3 Parallel Lift – HA050051 and up
WA75-3 – HA950051 and up
WA85-3 – HA960051 and up
WA90-3 – HA970051 and up
WA95-3 – HA980051 and up
Manuals: Shop Manual and Parts Catalog
00 SAFETY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .00-3
01 GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .01-1
10 STRUCTURE AND FUNCTION . . . . . . . . . . . . . . . . . . . . . .10-1
20 TESTING AND ADJUSTING . . . . . . . . . . . . . . . . . . . . . . . .20-1
30 DISASSEMBLY AND ASSEMBLY . . . . . . . . . . . . . . . . . . .30-1
90 APPENDIX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90-1
Manual Extract Power Train:

The engine power is transmitted to the drive axles through a hydrostatic system. The system consists of a variable displacement pump mounted on the engine and a variable displacement motor mounted on the rear axle transmission

distribution box. Power is transmitted from the variable displacement motor through the distribution box to the front and rear axles. The front axle is driven through a prop shaft from the distribution box.

Change in the direction driven is achieved by changing the oil flow direction from the variable displacement pump.
Changing from forward to reverse is done electrically and can be carried out under power. The force reaction takes place in the variable displacement drive motor.
The power transmitted to the front and rear axles passes through the pinion and crown wheels, through the limited slip differential to the half shafts.
The half shafts drive in turn the hub planetary reduction gears and through the planet carriers the wheels.