BEARING ASSEM. 4D4518 - Caterpillar

Note: Ensure that the brake accumulators are fully charged before you begin the following procedure. While the brake accumulators are charging, high pressure will be at the load sensing port.
Connect a differential pressure gauge to pressure taps (8, 9) on the pump discharge line and on the load sensing line.
Ensure that the hydraulic oil is at operating temperature. Place the transmission in NEUTRAL. Run the engine at low idle.
The difference between the two pressures is the margin pressure. The margin pressure should be 1600 100 kPa (232 15 psi).
If the margin pressure is out of range, loosen the locknut on margin spool (6) . Adjust margin spool (6) until the differential is 1600 100 kPa (232 15 psi). Tighten the locknut on the margin spool.High Pressure Cutoff (Testing and Adjusting)
Connect a 20000 kPa (2900 psi) pressure gauge to fan pump supply pressure tap (8) .
Disconnect the fan solenoid.
Run the engine at high idle.
The fan pump supply pressure should be 19000 700 kPa (2750 100 psi).
If the fan pump supply pressure is not 19000 700 kPa (2750 100 psi), loosen the locknut on high-pressure cutoff spool (5) . Continue to run the machine at high idle. Adjust the high-pressure cutoff spool until the gauge reads 19000 kPa (2750 psi). Tighten the locknut on the high-pressure cutoff spool.
Reconnect the fan solenoid when the adjustment is completed.Hydraulic Fan Speed (Testing and Adjusting)
Place the transmission in the NEUTRAL position. Engage the parking brake. Connect Caterpillar Electronic Technician (ET) to the diagnostic connector. The diagnostic connector is located to the left and behind the operator seat.
Illustration 7 g02260966
Start ET. When ET initializes, select the engine ECM from the choices that are available. Refer to Illustration 7.
Illustration 8 g02428248
Illustration 9 g02428436
Check all fault codes under the engine ECM. Ensure that no faults are present in the fan drive system. Ensure that no faults are present with the hydraulic oil temperature sensor, engine coolant temperature sensor and inlet manifold temperature sensor. If no faults are present, begin the calibration. Select "Service > Calibrations > Engine Cooling Fan Calibration". Refer to Illustration 8 and Illustration 9.
Illustration 10 g02428259
The screen that is shown in Illustration 10 will appear. Follow the instructions on the screen. Click on "OK".
Illustration 11 g02428276
The "Calibrations" screen will appear. Select both check boxes. Click on "Begin".
Illustration 12 g02428376
Ensure that the parking brake is set. Run the engine at high idle. Click on "Next" in the lower left corner of the screen.
Continue running the machine at high idle. Use the photo tach to measure