Komatsu PC500LC-10R Shop Manual page 308

COMPONENT PARTS OF WORK EQUIPMENT SYSTEM
When signal current is maximum (coil is energized)
1.
When the signal current flows into coil (4), coil (4) is energized.
Since the signal current is maximum at this time, the thrust force of plunger (5) also becomes the maxi-
mum.
2.
The spool (2) is pushed to the right by push-pin (6).
3.
The maximum rate of the pressurized oil flows from port (P) to port (C), and the circuit pressure between
EPC valve and control valve becomes the maximum.
4.
The port (T) closes and no pressurized oil flows into the hydraulic tank.
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10 STRUCTURE AND FUNCTION
PC500LC-10R
AEP2 1 6 3 8