Komatsu PC200-8M0 Shop Manual page 178

SEN06120-00
Self-pressure reducing valve
Function
This valve serves to reduce the discharge
q
pressure of main pump and provide it for sole-
noid valves, EPC valves, etc. for use as the
control pressure.
Operation
When engine is stopped
Poppet (11) is pressed against the seat by
q
spring (12), so port (PR) is disconnected from
port (TS).
q Valve (14) is pressed to the left by spring (13),
so port (P2) is disconnected from (TS).
q Valve (7) is pressed to the left by spring (8), so
port (P2) is disconnected from port (A2).
36
10-402
402 Hydraulic system, Part 2
Functions and operation by valve
PC200, 200LC, 220, 220LC-8M0