FAN GP-REVERSIBLE 2567451 - Caterpillar

Swing Hydraulic System
The swing hydraulic system uses only one control valve spool in the main control valve that supplies high-pressure oil to the swing motor.The swing motor is a fixed displacement, bidirectional piston type hydraulic motor. The swing motor has a pinion gear attached to the output shaft. The pinion gear engages with the internal gear teeth of the large swing gear (swing bearing). The swing gear is held stationary to the undercarriage structure. When the swing motor rotates, the upper structure rotates above the undercarriage structure.Swing joystick movement causes the swing pilot control valve to send pilot oil to the swing control valve spool. The swing control valve spool shifts and sends high-pressure pump supply oil from the idler pump to the swing motor. The movement of the swing control valve spool controls the oil flow rate and the direction of oil flow to the swing motor.Other components of the swing system include:
Swing control valve
Swing motor
Anti-reaction valves
Swing parking brake and swing parking brake solenoid
Swing driveNote: Refer to the appropriate sections in this manual for more information.