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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
H
igh bearing tem
p
erature
Lubri
cant l
eaks
B
earing noise or vibration
z
z
Insufficient lubrication
Insufficient amount of grease
Check bearing condition, add grease
z
z
z
Unsuitable grease quality or viscosity
Check ABB grease recommendations, change grease
z
Excessive axial forces
Faulty coupling or mounting
Check coupling, mounting and alignment
z
z
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
z
z
Faulty bearing seals
Check bearing seals and lubricant quality
z
Incorrectly assembled bearing
Replace bearing, ensure correct assembly
z
z
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