COVER 0996563 - Caterpillar

Loosen the locknut. Turn the adjustment screw clockwise for one half turn. Tighten the locknut.
Reset main relief valve pressure setting to the normal operating condition after the completion of the line relief test and adjust. Refer to Testing and Adjusting, "Relief Valve (Main) - Test and Adjust" for the machine.Temporary Setting of the Tool Relief Valve
A temporary setting of the tool relief valve is required before any line relief valves can be adjusted.
To adjust the tool relief valve pressure setting, operate the control input for extension of the attachment control valves to the FULL position and hold. Refer to Illustration 9 for the control input.
Check the tool relief valve pressure setting at pressure tap for the pump supplying oil to the tool.
Illustration 7 g02292622
Tool relief valve for the extension of the attachment control valves
Loosen the locknut. Turn the adjustment screw clockwise one quarter turn. Tighten the locknut.Note: Always make final pressure adjustments on pressure rise.
Continue Steps 3 and 4 until the pressure reading is above the line relief pressure setting. Refer to Table 2.
Reset the tool relief valve pressure setting to the normal operating condition after the completion of the line relief test and adjust. Refer to Testing and Adjusting, "One-Way/One or Two Pump - Electric Control: Relief Valve (Line) - Test and Adjust (Tool Relief Valve)" for the Tool Control System.Test Procedure
Start the engine.
Select a work tool to meet the following conditions.
One pump flowRefer to Testing and Adjusting, "Work Tool - Select" for the Tool Control System.
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.
Increase the hydraulic oil temperature to 50° 10°C (122° 18°F).
Enter the service mode.
Input the password "9992".
Select "Override Parameters".
Illustration 8 g02319174
Highlight "Power Shift Pressure" and press the OK key. Set the power shift pressure to the specification. Refer to Table 2 for the pressure specification. Confirm the power shift pressure setting at pressure tap (3).
Illustration 9 g02292583
Control Inputs for attachment control valves extended. (LJ) Left-hand joystick (RJ) Right-hand joystick (A) Thumb wheel (Forward) (A) Switch (FP) Electric foot pedal (A) Pedal (Forward)
Operate the control input in the appropriate direction in order to relieve the valve.Note: A continuous relief of the valve for more than 10 seconds is not allowed.
Check the main relief valve pressure setting at pressure tap (1) or pressure tap (2). Refer to Table 2 for the pressure specifications of the line relief valves.
Return the joystick to the NEUTRAL position.Adjustment Procedure
Attachment Control Valves Extend
Illustration 10 g02292496
Line relief valve for extension of the attachment control valves
To adjust the line relief valve pressure setting, operate the control input for extension of the attachment control valves to the FULL position and hold. Refer to Illustration 9 for the control input.
Check the pressure