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TM 9-2330-326-14&P
H-31.
BEARINGS (Cont.)
Contamination
Etching of the metal generally indicates
Grooves in the race indicate hard particles
water contamination, allowing oxidation to
in the lubricant.
attack the surfaces.
Scoring around the roller indicates
contamination  by  dirt,  grit  (from
outside), or metal particles (from
internal damage).
H-90



 


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