• Remove the cooling fan. Refer to the OEM service manual.
• Remove the cooling fan drive belt. Refer to Procedure 008-002 in Section 8.

NOTE: Optional two capscrew or four capscrew designs are available.

Remove the capscrews and the fan hub.

Inspect the fan hub for the following:

• Freedom of rotation
• Cracks
• Grease seal leakage.

Repair or replace the fan hub if the fan hub does not rotate freely or if there is evidence of cracks or grease seal leakage.

Measure the fan hub end clearance. The end clearance is dependent upon the fan hub style.

Replace the fan hub if the end clearance is not within specifications.

The end clearance on “Through-Bore” fan hubs (with bearing spacers) must be 0.08 mm to 0.40 mm [0.003 in to 0.016 in].

The end clearance on “Step-Bore” fan hubs (without bearing spacers) must be 0.08 mm to 0.25 mm [0.003 in to 0.010 in].

Install the new fan hub and the capscrews.

Hand tighten the capscrews.

Install the fan drive belts onto the fan hub and the accessory drive pulley. Do not tighten the belts.

Tighten the fan hub capscrews.

• Remove the cooling fan drive belt. Refer to Procedure 008-002 in Section 8.
• Remove the cooling fan. Refer to the OEM service manual.