VALVE GP-SOLENOID 2655214 - Caterpillar

Illustration 1 g02932661
(1) Accumulator (2) Pilot oil manifoldAccumulator (1) stores pilot pressure oil for use at the main control valves. During some operations, the pilot system needs more oil because there is insufficient flow from the pilot pump. Accumulator (1) will provide pilot pressure oil to the pilot system when the pilot pump flow is inadequate. Insufficient supply of pilot oil flow to the pilot system may be caused by the following two reasons:
Implements are lowered while the engine is stopped and oil supply to the main control valves is stopped.
Combined operations
Illustration 2 g02933077
Accumulator (1) Accumulator (2) Pilot oil manifold (3) Gas chamber (4) Bladder (5) Bowl (6) Oil ChamberPilot oil flows through the pilot filter into pilot oil manifold (6) .Accumulator (1) provides oil to the pilot line as makeup oil. During combined operations, the pilot system needs more oil because there is not enough flow from the pilot pump. When implements are lowered with the engine stopped, makeup oil supply is provided by accumulator (1) .Accumulator (1) stores hydraulic pressure oil by taking advantage of the compressibility of nitrogen gas in gas chamber (2) .