O-RING 1R6596 - Caterpillar

Disconnect connector (5) from the solenoid valve for swing parking brake (4). Test Procedure - 568 GF
Start the engine.
Increase the hydraulic oil temperature to 50° 10°C (122° 18°F).
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF. Refer to Testing and Adjusting, "Engine Performance - Test (Engine Speed)" for engine rpm settings.
Place the hydraulic activation control lever in the UNLOCKED position.
Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
Illustration 4 g02074640
Swing motor
(6) Adjustment plug
(7) Locknut
(8) Relief valve (right swing)
(9) Adjustment plug
(10) Locknut
(11) Relief valve (left swing)
Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (8) at pressure tap (2). Refer to Table 2 for swing relief pressure.
Return the joystick to the NEUTRAL position.
Slowly move the swing joystick for a full SWING LEFT operation and check the pressure for relief valve (11) at pressure tap (2). Refer to Table 2 for swing relief pressure.
Return the joystick to the NEUTRAL position. Adjustment Procedure
In order to adjust the swing relief valve, loosen the locknut and turn the adjustment plug until the pressure