6.7L Cummins Cooling System – Drive Belt, Cooling Fan – Clean and Inspect for Reuse

Inspect the drive belt for damage.
Transverse (across the belt) cracks are acceptable.
Longitudinal (direction of belt ribs) cracks that intersect with transverse cracks are not acceptable.
If the belt is frayed, punctured, or material is missing, the belt is unacceptable for reuse and must be replaced.

Inspect the belt grooves for:
โ€ข Embedded debris
โ€ข Uneven/excessive rib wear
โ€ข Exposed belt cords.
Inspect the backside of the belt for:
โ€ข Glazing (high heat)
โ€ข Embedded debris
โ€ข Exposed belt cords.
If any of the above conditions are present, the belt is unacceptable for reuse and must be replaced.

Inspect the idler and drive pulleys for wear or cracks.
Plastic pulleys often have a build-up of road dirt and belt material that is not to be confused with wear.
The dirt can be removed with a suitable tool to check for wear.
Clean , check, and reuse all pulleys in the front end accessory drive if not damaged, rather than replacing.
Pulleys damaged from embedded debris MUST be replaced .
Inspect the tensioner. Refer to Procedure 008-087 in Section 8.

Inspect all system pulleys for embedded debris:
โ€ข Rocks, stones
โ€ข Metal
โ€ข Belt material.
Remove the debris from the grooves of the pulley. If the pulley has been deformed as a result of foreign material
embedment, the pulley MUST be replaced.