Special Tools

1. Remove the air cleaner. Refer to the appropriate procedure:

•	Air Cleaner Element Replacement for the 6.6L engine

•	Air Cleaner Replacement for the 7.2L Caterpillar engine

•	Air Cleaner Replacement for the 8.1L engine

•	Air Cleaner Replacement for the 7.8L engine

2. Remove the fan shroud. Refer to Engine Coolant Fan Shroud Replacement.
3. Remove the drive belt. Refer to Drive Belt Replacement.



4. Install the J 46406 in order to secure the pulley.
5. Remove the fan clutch assembly (2).
6. Inspect the following components for cracks, distortion, or other damage:

•

The belt

•

The hub

•	The adapter

•	The pulley

7. Remove the bolts from the fan clutch.
8. Separate the fan clutch from the fan blade.

1. Install the fan clutch (2) to the fan blade (1).

Caution: Refer to Fastener Caution in the Preface section.

2. Install the bolts to the fan clutch.

Tighten
Tighten the bolts to 25 N·m (18 lb ft).

3. Install the fan clutch assembly to the pulley.
4. Install the J 38425 onto the fan clutch nut.

Install the J 46406 in order to secure the pulley.

Tighten
Tighten the nut to 145 N·m (107 lb ft).

5. Install the drive belt. Refer to Drive Belt Replacement.
6. Install the fan shroud. Refer to Engine Coolant Fan Shroud Replacement for the 6.6L engine.
7. Install the air cleaner. Refer to the appropriate procedure:

•	Air Cleaner Element Replacement for the 6.6L engine

•	Air Cleaner Replacement for the 7.2L Caterpillar engine

•	Air Cleaner Replacement for the 8.1L engine

•	Air Cleaner Replacement for the 7.8L engine