PLATE AS 9V9614 - Caterpillar

Illustration 1 g00284670
(1) Pressure compensator valve (2) Push-pull/cushion-hitch pump
Illustration 2 g00286804
Pressure Compensator Valve (3) Pressure compensator spool (4) Passage for pump outlet (5) Passage to the control piston (6) Spring (7) SetscrewPressure compensator valve (1) helps to regulate the output pressure of push-pull/cushion-hitch pump (2) .When the engine is running and the output pressure of the push-pull/cushion-hitch pump (2) is less than the setting of pressure compensator valve (1) , pressure compensator valve (1) signals push-pull/cushion-hitch pump (2) to increase the output pressure. Hydraulic oil from the outlet opening of push-pull/cushion-hitch pump (2) flows into passage (4) in pressure compensator valve (1) .When the engine is running and the output pressure of push-pull/cushion-hitch pump (2) is less than the setting of pressure compensator valve (1) , hydraulic pressure in passage (4) is low. Initially, pressure compensator spool (3) prevents hydraulic oil from flowing from passage (4) into passage (5) . The force of spring (6) prevents the movement of pressure compensator spool (3) toward setscrew (7) . This lack of flow through passage (5) signals push-pull/cushion-hitch pump (2) to increase the output pressure.The output pressure of push-pull/cushion-hitch pump (2) increases. The pressure in passage (4) increases until the hydraulic pressure on pressure compensator spool (3) overcomes the force of spring (6) . Pressure compensator spool (3) moves toward setscrew (7) .After pressure compensator spool (3) moves a sufficient distance toward setscrew (7) , hydraulic oil flows from passage (4) into passage (5) . The hydraulic oil then flows to the control piston of push-pull/cushion-hitch pump (2) . The control piston moves the swashplate of push-pull/cushion-hitch pump (2) to a minimum angle. Push-pull/cushion-hitch pump (2) maintains an output pressure of approximately 16000 kPa (2320 psi) .If the output pressure of cushion-hitch pump (2) decreases, the oil pressure decreases in passage (4) . Spring (6) moves pressure compensator spool (3) away from setscrew (7) . The flow from passage (4) into passage (5) is stopped by pressure compensator spool (3) . Hydraulic pressure to the control piston decreases to zero. The control piston activates push-pull/cushion-hitch pump (2) in order to increase output pressure again.Note: The hydraulic pressure in passage (4) that can move pressure compensator spool (3) is approximately 16000 kPa (2320 psi). This hydraulic pressure is the specified pressure setting of pressure compensator valve (1) . Use setscrew (7) to adjust pressure compensator valve (1) to the specified setting.