LINES GP-ENGINE OIL 9Y8902 - Caterpillar

Ensure that the key start switch is in the OFF position. Access to the fan blade is through door (1) on either side of the radiator group.
Clean a small area on the surface of one fan blade. Position the reflective tape so that the tape is visible. Then attach a piece of the reflective tape to the fan blade.
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Place photo pickup (2) into the holder on magnetic base (3) and tighten the screw. Attach magnetic base (3) to the fan guard assembly.
When the reflective tape and photo pickup (2) are in alignment, the LED indicator (red light) will come on. Position photo pickup (2) accordingly.Note: When you start the engine, vibration of the machine may cause the photo pickup to become misaligned. If necessary, adjust the position of magnetic base (3) in order to realign photo pickup (2) .
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.
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Start ET. When ET initializes, select the engine ECM from the choices that are available. Refer to Illustration 7.
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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.
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The screen that is shown in Illustration 10 will appear. Follow the instructions on the screen. Click on "OK".
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The "Calibrations" screen will appear. Select both check boxes. Click on "Begin".
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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 the fan speed. Adjust the current for the fan solenoid by using the arrows at the bottom of the screen. Increasing the current will decrease the fan speed. Decreasing the current will