Komatsu PC500LC-10R Shop Manual page 311

10 STRUCTURE AND FUNCTION
Check valve (When engine is stopped)
1.
The check valve is installed between port (P) and PPC sol-
enoid valve. When the engine is stopped, the reaction
force of spring (2) pushes plunger (1) to the left and port
(ACC) and port (P) are disconnected, thus the accumulat-
ed pressure in the accumulator is held.
Check valve (When engine is running)
1.
When the engine is running, the pilot pressure in port (P) pushes plunger (1) to the right, and port (P) and
port (ACC) are interconnected.
ATTACHMENT CIRCUIT SELECTOR VALVE
(Machine with attachment)
STRUCTURE OF ATTACHMENT CIRCUIT SELECTOR VALVE
General view and sectional view
P1: From attachment selector solenoid valve
PC500LC-10R
COMPONENT PARTS OF WORK EQUIPMENT SYSTEM
V: To control valve attachment 1 port
A EP2 1 63 3
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