Tools Required

J 38425 Fan Hub Wrench

Notice: If a fan blade is bent or damaged, do not repair and use the damaged part. Replace a bent or damaged fan assembly with a new fan assembly. Using a fan with a different diameter, pitch, number of blades, or type of blade material may effect the cooling efficiency, performance and engine noise level.

Inspect the hub and the drive components if a fan assembly fails.

A fan assembly may fail due to an imbalance in the hub. The blades may not be the cause.

1. Tilt the cab. Refer to Cab Tilting in General Information.




Important: The fan clutch (2) has a left hand thread and must be rotated clockwise for removal.

2. Position wrench on shaft flats.
3. Insert the J 38425 onto the fan hub.
4. Remove the fan (1) and the fan clutch (2).
5. Remove the following components:

•	The fan blade (1) to fan clutch bolts

•	The washers

6. Remove the fan blade (1) from the fan clutch (2).
7. Inspect the belts and the pulley for the following conditions:

•

Cracks

•	Distortion

•	Other damage

8. Replace the above components as necessary.

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

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the fan blade to fan clutch bolts and the washers.

Tighten
Tighten the fan to fan clutch bolts to 21 N·m (16 lb ft).

3. Install the fan (1) and the fan clutch (2).

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

4. Lower the cab. Refer to Cab Tilting in General Information.