Manual for Induction Motors and Generators
92 - Trouble Shooting
3BFP 000 050 R0101 REV E
8.1.2 Lubrication system and bearings
***Following chapter for bearing type: Rolling bearing
8.1.2.1 Lubrication system and rolling bearings
Trouble shooting
Lubrication system and antifriction bearings
oil supply and self lubrication
High bearing temperature
Lubricant leaks
Bearing noise or vibration
zz
Insufficient lubrication
Insufficient amount of grease Check bearing condition, add grease
zzz
Unsuitable grease quality or viscosity
Check ABB grease recommendations, change grease
z Excessive axial forces Faulty coupling or mounting Check coupling, mounting and alignment
zz Incorrect regreasing period Check ABB recommendations, regrease
z
z Faulty operating conditions Check ABB operating and grease recommendations
z
z Excessive lubrication Clean bearing and add correct amount of lubricant
z
z Impurities in grease Change grease, check bearing condition
z
z Bearing currents Check bearing and insulation condition
z
z Complete bearing failure Replace bearing
z
z Normal wearing Replace worn bearing parts
z Faulty instrumentation Faulty temperature detector Check bearing temperature measurement system
zzFaulty bearing seals Check bearing seals and lubricant quality
z Incorrectly assembled bearing Replace bearing, ensure correct assembly
zz
Outer ring is rotating due to unbalanced load
Rebalance machine, repair bearing bore and replace bearing
z Bearing noise due to deformed roller element Replace bearing
z Foreign matter inside the bearing Clean bearing assembly, check seal conditions and replace bearing
Experienced
malfunction
Possible cause Corrective action
Damaged bearing parts
Reduced grease quality
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