BUSHING 9U0757 - Caterpillar

Test
Start Electronic Technician.
Select the "Machine ECM" from the list of available controls.
From the top menu, select "Diagnostics".
From the pull-down menu, select "Diagnostic Tests".
Then select "Override Parameters".
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ET Screen (6) Boom Float Solenoid Override
Change the value of the "Boom Float Solenoid Override" (6) to "ON".Note: Do not leave this ET configuration screen during the entire test. Switching to another screen will cause the settings to be lost.
Start the engine.
Lower the left console.
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Power mode control button located on the soft panel switch
Push down on the power mode control button in order to activate power mode.Note: The indicator light will be illuminated when power mode is activated.
Use the Monitor in the cab in order to disable the Automatic Engine Speed Control.
Select the "Performance" menu from the main menu on the monitor.
Select "AESC Status" from the "Performance" menu and change the value to "Inactive".
Press the "OK" key.
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Joystick (front switch)
Disable the hydraulic modulation control, if equipped. Press the front switch on the right joystick in order to deactivate hydraulic modulation.
The air conditioning should be turned off for the following test.
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Engine speed dial
Set the engine speed dial at "1".Note: Be aware that the machine will be lifted from the ground if the Boom Down control is stalled.
Stall the Boom Up control in order to test the relief pressure for the head end and stall the Boom Down control in order to test the relief pressure for the rod end.
Check the minimum line relief pressure at the load sensing signal pressure tap.Note: Refer to Table 2 in this manual for the correct pressure.
If the minimum line relief pressure is correct, remove all of the modifications that were performed for this test.
If the minimum line relief pressure is incorrect, refer to the "Adjustment" procedure.Adjustment
Personal injury or death can result from sudden machine movement.Sudden movement of the machine can cause injury to persons on or near the machine.To prevent injury or death, make sure that the area around the machine is clear of personnel and obstructions before operating the machine.
Note: If an appropriate location is not available to fully extend the boom cylinders, exchange the functions of the boom line relief valves. Remove the line relief valve for boom cylinder head end (8) and the line relief valve for boom cylinder rod end (5) from the main control valve. Exchange the location of the line relief valves. Adjust the pressure of the boom line relief valve that is now attached in head end (8) . After completion of line relief valve adjustment, return the respective line relief valves to the original locations.
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Relief valve (SmartBoom function) (7) Locknut for adjustment screw (maximum relief pressure) (8) Adjustment screw (maximum relief pressure) (9) Locknut for adjustment screw (minimum relief pressure) (10) Adjustment screw (minimum relief pressure)
Turn adjustment screw (minimum relief pressure) (10) clockwise until stop while adjustment screw (maximum relief pressure) (8) is being held.
Loosen the hose on relief valve (4) and the elbow on relief valve (1) while screw (10) is held.
Loosen locknut (9) while