SUPPLEMENT FOR 768C TRACTOR & 769C TRUCK & 771C QUARRY TRUCK Caterpillar

Start By:

a. remove the fan drive and belt tightener (later) as a unit

1. Remove bolt and plate (1) that holds belt tightener (5) to the shaft on fan drive (4).

2. Remove spring anchor pin (3) that holds the spring to belt tightener (5), and remove bolt (2).

3. Separate belt tightener (5) from fan drive (4). The following steps are for installation of the fan belt tightener.

4. Install belt tightener (5) on the shaft of fan drive (4).

5. Install bolt and plate (1) that holds belt tightener (5) to the shaft on fan drive (4).

6. Put the tightener spring in position in the fan belt tightener, and install pin (3).

End By:

a. install the fan drive and belt tightener (later) as a unit