Terex Evoquip Bison 120, Operation Manual

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Maintenance 9
Operations Manual
Bison 120
20-07-2018
Page 9-59
Revision 2.0
9.12 Drive Belt Maintenance
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WARNING
Do not inspect or carry out work on belt drives before closing down the machine and implementing
the lockout and tag out procedure. Never operate the machine without effective drive guarding
in place.
NOTICE
The drive belt drive is a highly efficient power transmission medium, but optimum performance
will not be achieved without correct tensioning and alignment.
Drive belts should be inspected regularly for wear and also to monitor any pattern in the wear if
it is occurring. Insufficient belt tension will cause slippage leading to loss of drive efficiency, heat
generation and belt failure. Over tensioning will exert excessive loading on the shaft bearings
and can lead to premature failure.
When replacing a multi-belt drive always use a set of ‘matched’ new belts so that equal force
can be applied to all the belts. Ensure that any ventilation provided in the drive guarding is kept
clear to avoid overheating.
Do not allow contaminating material to come into contact with the drive elements.
(1) Alignment
It is important to align the pulleys, otherwise the belt flanks will wear quickly. Ensure axis are
parallel when viewed from all planes.
OMA00072
Figure 9.54 - Drive Belt Alignment Diagram
A - Correct installation, both shafts and pulleys are parallel and in alignment.
B - Incorrect, shafts are parallel from above but not from end view.
C - Incorrect, shafts are parallel and in alignment but pulleys are not in alignment.
D - Incorrect, shafts are not parallel to one another when seen from above.