Component Tests and General Diagnostics

Bearings-Inspection

NOTE: If any of the following conditions exists, replace the bearing.





1. Inspect bearing for bent cage.





2. Inspect bearings for galling (metal smears on roller ends).
^ Galling is caused by overheat, poor lubrication or overload.
^ If galling is found, replace bearing and inspect seals.





3. Inspect the bearing for princeling (surface indentations in the raceway).





4. Inspect bearing for cracked inner race.





5. Inspect the bearing and raceway for etching.
^ If etching is present inspect seals.





6. Inspect the bearing for heat discoloration (dark blue).
^ If heat discoloration is evident, check bearing and race for loss of temper. Draw a file across the component. If the file cuts the metal, there is a loss of temper.





7. Inspect the bearing for fatigue spelling (metal flaking).