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FIG. 32: Replace all the belts on multiple belt drives.
Never replace a single belt or part of a multiple belt drive.
If a new belt is used with old belts, the load will not be
divided evenly between the belts. Mixing new and old
belts can lead to early belt failure and not even sheave
wear.
(A) Indicates a new belt position.
(B) Indicates a used belt position.
FIG. 33: When replacing a belt, never force a belt over
the rim of a pulley. Do not pry or use force to install the
belt (A). This can break the cords in the belt. Loosen all
the tensioners before installing the new belt. If the belt still
can not be easily installed, run the belt over the rim while
rotating the pulley (B).
Tension the belts making sure the belts are at the correct
tension. More belts are damaged by not enough tension
than by too much tension. But, do not over tension the
belt as this damages the belt tensile members and puts
an additional load on the shafts and bearings.
Rotate the belt drive three revolutions. Check the belt
tension and adjust as necessary.
Check the drive alignment and adjust as necessary.
Install the guards or shields.
Start the drive, looking and listening for any not normal
noise or vibration. If possible, stop the drive and check the
bearings and sheaves for excessive heat. If the bearings
and sheaves are too hot the belt tension can be too high
or the bearings are not properly lubricated or failing.
Temperature can be checked with an infrared pyrometer.
4283528M1
General Information
A
B
B
FIG. 32
A
FIG. 33
A
D-5595d
B
D-5595b
01-25
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