Komatsu PC500LC-10R Shop Manual page 172

CLSS
1: Actuator
2: Control valve
3: Merge-divider valve
4: Main relief valve
5: Unload valve
Unload valve
It returns the minimum discharged volume from the pump to the tank at neutral. (although the flow amount is
little, there is no place for this oil to go)
Operating the lever causes the LS pressure which closes the valve.
10-78
10 STRUCTURE AND FUNCTION
6: PC valve
7: LS valve
8: Servo piston
9: Pump
10: Engine
PC500LC-10R