Pressure Regulation

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Pressure Control (PC) Solenoid 5

The PC solenoid 5 is energized (ON) allowing actuator feed limit fluid to enter the PCS 5 signal circuit. PCS 5 signal fluid is then routed through orifice #41 to the auxiliary line boost valve.

Auxiliary Line Boost Valve

PCS 5 signal fluid, at the auxiliary line boost valve, opposes auxiliary line boost valve spring force and orificed auxiliary line boost fluid pressure to regulate line or auxiliary line pressure into the auxiliary line boost circuit. Auxiliary line boost fluid is routed to the fluid pump and auxiliary fluid pump valve in order to regulate auxiliary line fluid pressure.

Line Pressure Control (PC) Solenoid

The line PC solenoid is de-energized (OFF) allowing PCS line fluid pressure to exhaust through the solenoid.