3408C & 3412C MARINE ENGINES Caterpillar


Fan Belts

Usage:

Remove Fan Belts

Start By:

a. remove fan

1. Loosen four nuts (1) fastening the fan drive bracket to the engine.

2. Loosen bolt (3) to loosen fan belts (2).

3. Remove three fan belts (2).

Install Fan Belts

NOTE: Inspect the fan belts for damage, cracks or wear. Replace with new belts if necessary.

1. Install three fan belts (2) on the pulleys.

2. Tighten bolt (3) until fan belts (2) are tightened.

3. If belts are new, tighten bolt (3) until fan belts (2) reach a tension of 534 ± 22 N (120 ± 5 lb). Use Tool (A) to determine the belt tension.

4. If belts are used, tighten bolt (3) until fan belts (2) reach a tension of 400 ± 44 N (90 ± 10 lb). Use Tool (A) to determine the belt tension.

5. Tighten four nuts (1) fastening the fan drive to the front housing.

End By:

a. install fan

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