Komatsu PC88MR-10 Shop Manual page 200

10 Structure and function
Travel motor
Specifications
(PC88MR-C400-030-K-00-A)
Displacement (cm 3 /rev)
Rated speed (rpm)
Parking brake releasing pressure (MPa {kg/cm
Speed selector pressure (MPa {kg/cm
Reduction ratio
Operation of travel motor
At high travel speed (motor swash plate angle is minimum)
1. 2nd travel speed selector solenoid valve
2. Regulator valve
3. Spring
4. Check valve
5. Regulator piston
6. Swash plate
7. Parking brake piston
8. Main pump
9. Travel control valve
10. Merge-divider valve
11. Self-pressure reducing valve
12. Brake valve
Since 2nd travel speed selector solenoid valve (1) is de-energized, the pressurized oil from main pump (8)
does not flow into port (P).
10-122
Model
2 })
2 })
(PC88MR-C400-044-K-00-A)
GM10VA-B
Hi
Lo
Hi
Lo
0.63 {6.42}
30.5
54.3
2,628
1,507
2.94 {30}
45.97
PC88MR-10