LEVER 1424001 - Caterpillar

Illustration 1 g00542589
Pump compartment (1) Pressure tap (power shift pressure) (2) Pressure tap (front pump delivery pressure) (3) Pressure tap (rear pump delivery pressure)
Connect a 60000 kPa (8700 psi) pressure gauge to pressure tap (2) .
Illustration 2 g00342655
Swing motor (26) Connector (27) Solenoid valve for swing parking brake
Disconnect connector (26) from the solenoid valve for swing parking brake (27) .
Start the engine.
Place the machine controls at the following settings: Power Mode, engine speed dial "10" and AEC switch OFF. Make reference to Testing And Adjusting, "Operational Checks" for engine rpm settings.
Increase the hydraulic oil temperature to 55° 5°C (131° 9°F).
Move the joystick for the swing slowly and ensure that the swing parking brake is operating properly.
Illustration 3 g00342653
Relief valves (swing motor) (22) Adjustment plug (23) Locknut (24) Relief valve (right swing) (25) Relief valve (left swing)
Slowly move the swing joystick for a full SWING RIGHT operation. Hold the swing joystick in this position.
Check the pressure for relief valve (24) at pressure tap (2) .
Return the swing joystick to the NEUTRAL position.
The pressure setting for the swing relief valve is 24000 980 kPa (3500 140 psi). If the pressure setting of the swing relief valve 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 24000 980 kPa (3500 140 psi).Note: Turning adjustment plug (22) clockwise increases the pressure. Turning adjustment plug (22) counterclockwise decreases the pressure.
Tighten locknut (23) to a torque of 160 30 N m (120 22 lb ft).
Slowly move the swing joystick for a full SWING LEFT operation. Hold the swing joystick in this position.
Check the pressure for relief valve (25) at pressure tap (2) .
Return the swing joystick to the NEUTRAL position.
The pressure setting for the swing relief valve is 24000 980 kPa (3500 140 psi). If the pressure setting of the swing relief valve is not within the specification, adjust the swing relief valve.
Adjust relief valve (25) for left swing in the same manner as relief valve (24) for right swing.Note: Always make final pressure adjustments on pressure rise.