79032966 A Rev. 01-55
General Information
TABLE 4 Drive Belt Makes Noise
Symptom / Observation Possible Causes Corrections / Remedy
Belt makes noise. Belt slippage. Properly adjust belt tension.
Belt or sheaves contaminated with
oil, grease, or chemicals.
Repair cause of oil, grease, or chemicals.
Clean belt and sheave grooves with a
degreasing solvent that is not flammable or
toxic, then wash the belts with a soap and
water solution.
Properly adjust belt tension.
Belt makes a slapping
sound.
Belt tension too loose. Properly adjust belt tension.
Belt strand lengths are not equal. Properly install a new original equipment belt
and adjust the belt tension and idler spring.
Driver and driven sheaves not
aligned.
Align sheaves and check alignment with
sheaves loaded and unloaded.
Properly adjust belt tension.
Idler sheave not aligned. Align sheaves and check alignment with
sheaves loaded and unloaded.
Properly adjust belt tension.
Belt makes a rubbing
sound.
Belt rubbing on some obstruction. Remove obstruction and align drive to give
needed clearance.
Belt makes an not normal
or loud noise.
Belt profile does not equal sheave
groove profile.
Replace worn sheaves.
Properly install a new original equipment belt
and adjust the belt tension and idler spring.
Worn sheave grooves (check with
groove gauge).
Replace worn sheaves.
Properly install a new original equipment belt
and adjust the belt tension and idler spring.
Trash or debris fell into sheave
grooves.
Clean trash and debris from the sheave
grooves.
Correct the cause of trash and debris entering
the sheave grooves and make sure all the
protective shields are installed.
Drive makes a grinding
sound.
Damaged or failed shaft bearings. Replace damaged or failed bearings as
required.
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