Manual for Induction Motors and Generators
Trouble Shooting - 93
3BFP 000 050 R0101 REV E
***Following chapter for bearing type: Sleeve bearing
8.1.2.2 Lubrication system and sleeve bearings
***Following chart for bearing type: Sleeve bearing with self lubrication
Trouble shooting
Lubrication system and sleeve bearings
self lubrication
High bearing temperature
Oil leaks
Oil inside the machine
Bearing noise or vibration
Visibly poor oil quality
zzz
Insufficient lubrication
Low oil level Check bearing for leakage, add oil
z
zz zUnsuitable oil quality Check ABB oil recommendations
z
z Oil quality is reduced Incorrect oil change period Clean bearing and change oil
zz zzExcessive axial load Faulty coupling or mounting Check coupling, mounting and alignment
zz z Machine misalignment Realign machine
zzIncorrectly assembled bearing Verify correct bearing assemblage and adjustments
zzz Excessive amount of oil Clean bearing and add correct amount of lubricant
z
z
z
Oil impurities Change oil, check bearing condition, replace bearing shells
z
z Bearing currents Restore bearing insulation, replace bearing shells
z
z Complete bearing failure Replace bearing parts
z
z Normal wearing Replace bearing shells
z
z Operating speed too low Check the operating speed range of bearing
z Faulty instrumentation Faulty temperature detector Check bearing temperature measurement system
z Damaged or worn-out bearing seals Replace bearing seals
z External vacuum Rotating equipment nearby Check pressure levels, relocate rotating equipment
zz Internal over pressure Pressure compensation failure Remove cause for internal over pressure
z Damaged machine seal Replace or repair machine seal
z Poor oil ring or disc operation Open bearing and adjust operation
zzForeign matter inside the bearing Clean bearing and check seal condition
Damaged bearing shells
Experienced
malfunction
Corrective actionPossible cause
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