BOLT 7B9215 - Caterpillar

Table 1
Lubrication System and Anti-friction Bearings
Experienced Malfunction Possible Cause Corrective Action
High Bearing Temperature Lubrication Leaks Bearing Noise or Vibration
Yes No Yes Insufficient lubrication Insufficient amount of grease Check bearing condition, add grease
Yes Yes Yes Unsuitable grease quality or viscosity Check grease recommendations, change grease
Yes No No Excessive axial forces Faulty coupling or mounting Check coupling, mounting and alignment
Yes No Yes Reduced grease quality Incorrect regreasing period Check recommendations, re-grease
Yes No Yes Faulty operating conditions Check operating and grease recommendations
Yes Yes No Excessive lubrication Clean bearing and add correct amount of lubricant
Yes No Yes Damaged bearing parts Impurities in grease Change grease, check bearing condition
Yes No Yes Bearing currents Check bearing and insulation condition
Yes No Yes Complete bearing failure Replace bearing
Yes No Yes Normal wearing Replace worn bearing parts
Yes No No Faulty instrumentation Faulty temperature detector Check bearing temperature measurement system
No Yes Yes Faulty bearing seals Check bearing seals and lubricant quality
Yes No No Incorrectly assembled bearing Replace bearing, ensure correct assembly
Yes No Yes Outer ring is rotating due to unbalanced load Rebalance machine, repair bearing bore and replace bearing
No No Yes Bearing noise due to deformed roller element Replace bearing
No No Yes Foreign matter inside the bearing Clean the bearing assembly, check seal conditions and replace bearing
Table 2
Lubrication System and Sleeve Bearings Self Lubrication
Experienced Malfunction Possible Cause Corrective Action
High Bearing Temperature Oil Leaks Oil Inside the Machine Bearing Noise or Vibration Visibly Poor Oil Quality
Yes No No Yes Yes Insufficient lubrication Low oil level Check bearing for leakage, add oil
Yes Yes Yes No Yes Unsuitable oil quality Check oil recommendations
Yes No No Yes No Oil quality is reduced Incorrect oil change period Clean bearing and change oil
Yes Yes No Yes Yes Excessive axial load Faulty coupling or mounting Check coupling, mounting and alignment
Yes Yes No Yes No Machine misalignment Realign machine
Yes No No Yes No Incorrectly assembled bearing Verify correct bearing assemblage and adjustments
Yes Yes Yes No No Excessive amount of oil Clean bearing and add correct amount of lubricant
Yes No No Yes Yes Damaged bearing shells Oil impurities Change oil, check bearing condition, replace bearing shells
Yes