Komatsu PC200-8M0 Shop Manual page 234

SEN06121-00
Operation
1) When signal current is 0 (coil is de-energized)
q When there is no signal current flowing from the controller to coil (4), coil (4) is de-energized.
Spool (2) is pushed to the left by spring (3).
q
q Port (C) closes and the pressurized oil from the front pump does not flow to the control valve.
q The pressurized oil from the control valve is drained to the tank through port (C) and port (T).
36
10-403
403 Hydraulic system, Part 3
PPC valve
PC200, 200LC, 220, 220LC-8M0