COUPLING GP-PUMP 7Y1584 - Caterpillar

Illustration 1 g01358693
Location of Piston Pump (work tool) (1) Piston Pump (work tool) (2) Rear section of the hydrostatic pump (3) Inlet (4) OutletMachines that are equipped with the high flow hydraulic system use a piston pump for the work tool hydraulic system. Hydraulic oil for the work tool control valve is supplied by the piston pump (work tool) (1). The piston pump (work tool) (1) is mounted on the rear section of the hydrostatic pump (2).
Illustration 2 g01358687
Piston pump (work tool) (5) Head (6) Actuator piston (7) Bias spring (8) Piston (9) Slipper (10) Housing (11) Input shaft (12) Swashplate (13) Slipper retainer (14) Cylinder barrel (15) Cylinder spring (16) Valve plateThe piston pump (work tool) (1) is a variable displacement axial piston pump. The piston pump is controlled by a load sensing line. The pump is used to supply pressure oil to the work tool control valve. The movement of pistons (8) in the pump pulls oil from the hydraulic tank. The pressure oil from the hydraulic pump supplies the work tool control valve.When the engine is in operation and drive shaft (11) is rotating, the components that rotate are cylinder barrel (14), pistons (8), slipper pads (9), and the slipper retainer (13). There are nine piston assemblies in the barrel assembly. The components of the pump that remain are fastened to pump housing (10) .Oil from the hydraulic tank flows into pump head (5) at inlet passage (3). The oil then flows from inlet passage (3) through inlet passages in valve plate (16). When drive shaft (11) turns, the openings of cylinder barrel (14) move toward the inlet passages of valve plate (16) .Each piston (8) inside cylinder barrel (14) is held against swashplate (12) by the slipper retainer (10). Swashplate (12) can be at any angle between the maximum angle and the minimum angle.As pistons (8) follow the angle of swashplate (12), the pistons move in and out of cylinder barrel (14). When pistons (8) move out of cylinder barrel (14), oil is pulled into cylinder barrel (14) .The angle of swashplate (12) determines the amount of oil that is drawn into cylinder barrel (14). As cylinder barrel (14) rotates, the swashplate angle pushes pistons (8) back into cylinder barrel (14). Pistons (8) will then push oil out of cylinder barrel (14). The oil then flows through the outlet passages of valve plate (16) .The angle of swashplate (12) determines the amount of oil that is pushed out of cylinder barrel (14) .There are infinite swashplate angle positions. Swashplate (12) can be at any angle between the minimum angle and the maximum angle. The minimum angle is perpendicular with drive shaft (11). The discharge of oil is greater when the angle of swashplate (12) is greater. Oil is discharged through valve plate (16) to outlet passage (4) .When swashplate (12) is at a minimum angle, pistons (8) do not move in and out of rotating cylinder barrel (14). Therefore, no oil is drawn into the