Troubleshooting - BONFIGLIOLI HDP Series Installation Use And Service Manual

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's technical
documentation for the machine/plant in question.
PROBLEM
Bearing temperature too high
Operating temperature too high
Abnormal running noise
Abnormal noise at gear unit mounting
Oil leaks
Gear unit does not run or runs with
difficulty
Output shaft does not turn with motor
running
34
CAUSE
Oil level too low
Oil too old
Defective bearings
Oil level too high
Oil too old
Impurities in oil
Gears damaged
Bearing axial backlash too high
Bearings defective or worn
Service load too high
Impurities in oil
Mounting bolts loose
Mounting bolts worn
Oil level too high
Casing/coupling seals inadequate
Gaskets worn
Oil viscosity too high
Oil level too high
Service load too high
Gears damaged
SOLUTION
Top up oil level
Replace oil
Contact authorised workshop
Check oil level
Replace oil
Replace oil
Contact authorised workshop
Contact authorised workshop
Contact authorised workshop
Correct service load to nominal values
given in Sales Catalogue
Replace oil
Tighten down to specified torque
Replace bolts
Check oil level
Contact authorised workshop
Contact authorised workshop
Replace oil (see table of recommended
lubricants)
Check oil level
Redesign drive for actual service load
Contact authorised workshop