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 TM 9-2330-326-14&P
H-31. BEARINGS (Cont.)
Improper Lubrication
Flaking metal lifting off across the full
Discoloration indicates high heat. Low
surface. Probable causes: lubrication
lubricant levels can produce high heat
break-down, improper viscosity, or lack
which further breaks down viscosity.
of lube.
Installation Damage
Nicks in the cage or retainer. Probable
Deformed ribs indicate rough handling,
cause: drift used during installation.
poor installation, or excessive press fit
from a wrong application or distorted
hub.
Broken inner ring indicates excessive
Dings and dents in the bearing surfaces
interference fit and excessive installation
indicate a drift was used during
pressure.
installation.
H-91
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