TRACK ASSY. 0878810 - Caterpillar

Illustration 1 g00988905
Pump Compartment (24) Pressure tap (power shift pressure) (25) Pressure tap (drive pump pressure) (26) Pressure tap (idler pump)
Attach a 38000 kPa (5500 psi) pressure gauge to pressure tap (26) .
Illustration 2 g00994459
Stop Valve
Close the stop valves that are mounted on each side of the stick. A stop valve is on each side of the stick. This will prevent oil flow to the work tool during this procedure.
Start the engine.
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 the machine for engine rpm settings.
Perform the calibration procedure for engine speed in Testing and Adjusting, "Governor Actuator - Calibrate"for the Engine and Pump Control System.
Set the pilot pressure to the specifications that are in Testing and Adjusting, "Relief Valve (Pilot) - Test and Adjust" for the machine.
Warm the hydraulic oil to 55° 5°C (131° 9°F).
Set the main relief valve to specifications. Refer to Testing and Adjusting, "Relief Valve (Main) - Test and Adjust" for the machine.
Perform the calibration for the proportional solenoid valve for negative flow control. Refer to Testing and Adjusting, "System 16: Solenoid Valve (Proportional Reducing) - Calibrate (Negative Flow Control)" for the Tool Control System.
Calibrate the power shift pressure. Refer to Testing and Adjusting, "Proportional Reducing Valve - Calibrate - Power Shift" for the Engine and Pump Control System.
Illustration 3 g00849680
(2) Right foot pedal
Press right foot pedal (2) in the FORWARD position and hold the foot pedal FORWARD.
At pressure tap (26) , check the pressure setting for the line relief valve that is mounted near the boom foot .
Release the right foot pedal.
The relief valve pressure setting for the work tool is 20600 1500 kPa (2990 220 psi). If the relief valve pressure setting for the work tool is not within the specification, adjust the relief valve pressure setting for the work tool 3447 kPa (500 psi)and 5171 kPa (750 psi) above the operating pressure setting of the tool.Note: Refer to the manufacturer of the tool.
Illustration 4 g00989153
(15) Locknut (16) Adjustment screw
In order to adjust the relief valve for the work tool, loosen the locknut. Then turn the adjustment screw until the pressure gauge reading at pressure tap (26) is 20600 1500 kPa (2990 220 psi).Note: Turning the adjustment screw clockwise increases the pressure. Turning the adjustment screw counterclockwise decreases the pressure.Note: Always make final pressure adjustments on pressure rise.
Tighten locknut (15) to a torque of 50 10 N m (37 7 lb ft).