Komatsu PC500LC-10R Shop Manual page 351

10 STRUCTURE AND FUNCTION
MOTOR PORTION OF TRAVEL MOTOR
OPERATION OF MOTOR PART OF TRAVEL MOTOR
During low-speed travel (motor swash plate angle is maximum)
1.
When the solenoid valve is de-energized, no pilot pressure oil flows from the self-pressure reducing valve
to port (P).
2.
Regulator valve (17) is pressed down by spring (18).
3.
The pressurized oil from control valve pushes the check valve (21), flows to the end cover (6), and via regu-
lator valve (17) to the chamber (b).
4.
A downward force is generated in regulator piston (9).
PC500LC-10R
COMPONENT PARTS OF TRAVEL SYSTEM
AEP20513
10-257