3406E TRUCK ENGINE Caterpillar

Fan Drive

Usage:

Remove and Install Fan Drive

Typical Example

1. Loosen two bolts (2) and two nuts (3). Remove bolt (1), and remove fan drive belts (4).

2. Remove the nuts and bolts that hold the fan drive in place. Remove fan drive (5).

NOTE: The following steps are for installation of the fan drive.

3. Put fan drive (5) in position on the timing gear cover.

4. Install bolts (2) and nuts (3) loosely.

NOTE: Make a replacement of the belts as a set only.

5. Install fan belts (4). Install bolt (1). Make an adjustment to the belt tension with Tool (A). Measure the belt farthest away from the engine. Tighten new belts to a gauge indication of 120 ± 5. After the engine is operated at high idle for a minimum of 30 minutes, make another adjustment to the belt tension. The correct tension for used belts is a gauge indication of 90 ± 10.

6. Tighten bolts (2) and nuts (3) that hold the fan drive in place. Tighten bolts (2) to a torque of 105 ± 20 N·m (77 ± 15 lb ft). Tighten nuts (3) to a torque of 47 ± 9 N·m (416 ± 80 lb in).

Disassemble Fan Drive

Start By:

a. remove fan drive

Typical Example

1. Remove two bolts (2) that hold the fan adapter to the pulley.

2. Remove fan adapter (1) from the pulley.

Typical Example

3. Remove bolts (3) and washer (4). Remove seal (5).

Typical Example

4. Remove pulley (8) from bracket (6).

5. Remove bearing (10) and spacer (9) from the pulley. Remove spacer (7), seal (11) and bearing (12) from the pulley.

Assemble Fan Drive

Typical Example

1. Install bearing (12) in the rear of pulley (8).

Typical Example

2. Install lip seal (11) with Tooling (A). The lip of the seal must be away from the bearing. Put 5P-0960 Grease Cartridge on the lip of the seal.

3. Install spacer (7) so the end with the taper is toward the inside of pulley (8).

4. Install spacer (9) and bearing (4) in the front of the pulley.

Typical Example