The engine cooling fan is typically driven by a crankshaft- driven belt. In some applications, the fan is located off the
engine for a remote mounted cooling system .
The cooling fan is supplied by the OEM and they must be contacted for any service-related information. This
procedure only highlights some of the items related to cooling fans.
If the fan is belt-driven, a slipping belt will result in a slower fan speed and reduced cooling. A malfunctioning
automatic belt tensioner can be the problem. Refer to Procedure 008-087 in Section 8.
Check the bearings in the fan hub and other pulleys to make sure they are not causing excessive belt vibration
and slippage. Refer to Procedure 008-036 in Section 8.
The cooling fan must be inspected periodically. Check for cracks, loose rivets, and bent or loose blades.
Check the fan to make sure it is securely mounted.
Tighten the capscrews, if necessary.
Do not straighten a bent fan blade or continue to use a damaged fan. A bent or damaged fan blade can fail
during operation and cause personal injury or property damage.
Replace a damaged cooling fan with an exact equivalent cooling fan only. Although same size cooling fans can
appear similar, there are potential differences in the blade pitch and profile.
