770G and 772G Off-Highway Truck/Tractors Caterpillar


Hydraulic Fan System

Usage:

770G ECM

Verify that the Fan Drive is ON

The fan drive may be turned ON or the fan drive may be turned OFF through the Electronic Technician (ET). When the Fan drive is ON, the fan drive is in a variable speed mode. When the fan drive is OFF, the fan drive is in the locked up mode.

Locking up the fan drive can verify that the fan drive is mechanically sound and hydraulically sound. In order to change the mode of the fan drive, use ET and the procedure that follows:



    Illustration 1g02285157
    Typical view

  1. After connecting with ET, select the engine ECM.


    Illustration 2g02285137
    Typical view

  2. Select the tool configuration icon.


    Illustration 3g02285233
    Typical view

  3. After selecting the tool configuration icon, select the "ECM Configuration Parameters".


    Illustration 4g02285733
    Typical view

  4. Select the "Engine Fan Control" with a double click.


    Illustration 5g02285753
    Typical view

  5. Select the drop-down menu next to the value. Select the "ON" parameter in order to enable the engine fan control. Ensure that the new value reads "ON". Select the "OK" button.


    Illustration 6g02285773
    Typical view

  6. Select "YES" in order to enable the engine fan control.

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