Komatsu PC500LC-10R Shop Manual page 297

10 STRUCTURE AND FUNCTION
15: Front pump
15a: Servo
15b: LS valve
15c: PC valve
16: Rear pump
16a: Servo
16b: LS valve
16c: PC valve
17: Control valve
17a: Self-pressure reducing valve
FUNCTION OF OIL FLOW ADJUSTER SYSTEM FOR ATTACHMENT
When the attachment control pedal is depressed fully, the oil flow to the attachment is controlled by setting the
working mode and oil flow with the machine monitor.
The operation of the attachment changes as shown in the table below, depending on the working mode.
Working mode
ATT/P, ATT/E
PC500LC-10R
B
OIL FLOW ADJUSTER SYSTEM FOR ATTACHMENT
17b: Merge-divider valve
17c: Travel junction valve
18: Attachment selector solenoid valve
19: PPC lock solenoid valve
20: Attachment flow adjustment EPC valve
21: Front pump PC-EPC valve
22: Rear pump PC-EPC valve
23: Attachment circuit selector valve
24: Attachment
25: Accumulator
Operation of attachment
Double-acting
Single-acting
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