AFTERCOOLER GP 2426168 - Caterpillar

Illustration 1 g00764110
Pump compartment (1) Pressure tap (right pump delivery pressure) (2) Pressure tap (left pump delivery pressure) (3) Pressure tap (power shift pressure)
Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) .
Illustration 2 g00764220
Pilot oil manifold (28) Connector (29) Swing parking brake solenoid valve
Disconnect connector (28) from swing parking brake solenoid valve (29) .
Start the engine.
Place the machine controls at the following settings: engine speed dial "10" and AEC switch OFF.Reference: Refer to Testing And Adjusting, "Engine Performance - Test" for engine rpm settings.
Move the swing joystick slowly and ensure that the swing parking brake is operating properly.
Illustration 3 g00764223
Swing motor (22) Adjustment plug (23) Locknut (24) Relief valve (right swing)
Slowly move the swing joystick for a full SWING RIGHT operation and check the pressure for relief valve (24) at pressure tap (2) .
Return the swing joystick to the NEUTRAL position.
If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
In order to adjust the swing relief valve, loosen locknut (23). Turn adjustment plug (22) until the pressure gauge reading at pressure tap (2) is the correct relief pressure.Note: Turning adjustment plug (22) clockwise increases the pressure. Turning adjustment plug (22) counterclockwise decreases the pressure.Note: Always make final pressure adjustments on pressure rise.
Tighten locknut (23) .
Illustration 4 g00764224
Swing motor (25) Relief valve (left swing) (26) Locknut (27) Adjustment plug
Slowly move the swing joystick for a full SWING LEFT operation and check the pressure for relief valve (25) at pressure tap (2) .
Return the swing joystick to the NEUTRAL position.
If the pressure reading at pressure tap (2) is not within the specification, adjust the swing relief valve.
In order to adjust the swing relief valve, loosen locknut (26). Turn adjustment plug (27) until the pressure gauge reading at pressure tap (2) is the correct relief pressure.Note: Turning adjustment plug (27) clockwise increases the pressure. Turning adjustment plug (27) counterclockwise decreases the pressure.Note: Always make final pressure adjustments on pressure rise.
Tighten locknut (26) .
After completing the test and/or the adjustment procedures for the swing relief valves, stop the engine.
Release the pressure in the hydraulic system. Refer to Testing And Adjusting, "Hydraulic System Pressure - Release".
Connect connector (28) to the solenoid valve for swing parking brake (29) .