Parker EME
Maintenance
and service
192-510014 N04 March 2010
19
3.5
Checking / exchanging / tensioning timing belt
Visual inspection of the timing belt
A certain sign of wear may have different causes so that it is not always possible, to determine the
exact cause. The following table shows possible causes for typical damages:
Kind of error
mögliche Ursache
Action
Abnormal wear of loaded tooth
flanks of the belt
Faulty belt pre-tension
Exchange timing belt, set pre-tension.
Overload
Exchange timing belt, set pre-tension.
Check, if the load is in the admissible range.
Abnormal wear at the tooth root
surface of th belt
Pre-tension too high
Exchange timing belt, set pre-tension.
Drive torque too high
Verify drive dimensioning.
Abnormal wear at the side flank of
the belt
Faulty alignment of timing belt
Exchange timing belt, set pre-tension.
Twisted edge of the
roller/pulley
Please contact us.
Sheared off belt teeth
Pre-tensioning too weak
Overload (by collision)
Exchange timing belt, set pre-tension.
Splits at the belt teeth
Faulty belt pre-tension
Exchange timing belt, set pre-tension.
Overload
Exchange timing belt, set pre-tension.
Check, if the load is in the admissible range.
Deterioration of the belt
material
Exchange timing belt, set pre-tension.
Breaking of the timing belt
Faulty belt pre-tension
Exchange timing belt, set pre-tension.
Overload
Exchange timing belt, set pre-tension.
Check, if the load is in the admissible range.
Softening of the timing belt material
Operating temperature too
high
Exchange timing belt, set pre-tension.
Lower operating temperature.
Contact with solvent
Exchange timing belt, set pre-tension.
Do not clean belt with solvents.
Skipping of teeth, loss of machine
zero
Pre-tension too low
Wrong motor position (below)
with vertical application
Set pre-tension correctly.
If possible move drive
upwards
Alternatively: Increase pre-tension
or reduce load in lengthwise direction.
