9 TROUBLESHOOTING
The following information is intended to serve as an aid in identifying and correcting defects and faults.
In some cases, such problems may be caused by the plant or machine onto which the gear unit is
assembled, and hence, the cause and eventual solution can be found in the Manufacturer’
documentation for the machine/plant in question.
Bearing temperature too high
Oil level too low Top up oil level
Oil too old Replace oil
Defective bearings Contact authorised workshop
Operating temperature too high
Oil level too high Check oil level
Oil too old Replace oil
Impurities in oil Replace oil
Abnormal running noise
Gears damaged Contact authorised workshop
Bearing axial backlash too high Contact authorised workshop
Bearings defective or worn Contact authorised workshop
Service load too high
Correct service load to nominal values
given in Sales Catalogue
Impurities in oil Replace oil
Abnormal noise at gear unit mounting
Mounting bolts loose Tighten down to specified torque
Mounting bolts worn Replace bolts
Oil leaks
Oil level too high Check oil level
Casing/coupling seals inadequate Contact authorised workshop
Gaskets worn Contact authorised workshop
Gear unit does not run or runs with
difficulty
Oil viscosity too high
Replace oil (see table of recommended
lubricants)
Oil level too high Check oil level
Service load too high Redesign drive for actual service load
Output shaft does not turn with motor
running
Gears damaged Contact authorised workshop
PROBLEM CAUSE SOLUTION
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