Komatsu PC600LC-7 Manual page 149

STRUCTURE, FUNCTION AND MAINTENANCE STANDARD
BUCKET CURL HI CANCEL
Operation
When solenoid is de-energized
• The signal current does not flow from the control-
ler, so coil (3) is de-energized.
For this reason, spool (4) is returned to the neu-
tral position by spring (6).
As a result, the circuit between ports P and A is
connected, and the pressurized oil from the
PPC valve flows to the control valve.
When solenoid is energized
• When the signal current flows from the controller
to coil (3), coil (3) is energized and movable iron
core (2) is pushed to the right in the direction of
the arrow.
• For this reason, spool (4) is also pushed to the
right in the direction of the arrow.
As a result, port P is closed, and the pressure oil
from the control pump does not flow to the con-
trol valve.
At the same time, port A and port T are intercon-
nected, and the oil from the control valve is
drained to the tank.
PC600, 600LC-7
1. Connector
2. Movable iron core
3. Coil
4. Spool
5. Body
6. Spring
7. Plug
SOLENOID VALVE
10-117