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TABLE 3 Belt Turns Over in Sheaves
Symptom / Observation Possible Causes
Belt turns over in the
sheaves and runs or can
turn over and come off
sheaves when no reason
can be seen.
4283528M1
Excessive lateral belt movement.
Trash or debris fell into the sheave
grooves.
Sheaves not aligned.
Worn sheave grooves (check with
groove gauge).
Belt tensile members broken or
damaged from not correct
installation (belt forced onto
sheaves).
Intermittent or shock loading of the
drive belt.
Belt strand lengths are not equal
(multiple strand or power band
belts).
General Information
Corrections / Remedy
Properly adjust the belt tension.
Clean trash and debris from the sheave
grooves.
Correct the cause of trash and debris entering
the grooves.
Make sure all protective shields are installed.
Align the driver, driven, and idler sheaves.
Check alignment with the drive loaded and
unloaded.
Properly adjust the belt tension.
Replace the worn sheaves.
Properly install a new original equipment belt
and adjust the belt tension and idler spring.
Properly install a new original equipment belt
and adjust the belt tension and idler spring.
Correct the cause of intermittent and shock
loading of the drive belt.
Properly install a new original equipment belts
and adjust the belt tension and idler spring.
01-29
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