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            Description

            Moisture contamination and degraded lubricants react with the bearing surfaces generating rust and etching pits

            Causes

            Moisture contamination

            Acid etching and rust on a tapered bearing cup.

            Acid etching and rust on a tapered bearing cup.

            Widespread acid etching on a cylindrical outer race.

            Widespread acid etching on a cylindrical outer race.

            Acid etching on a cylindrical bearing roller assembly.

            Acid etching on a cylindrical bearing roller assembly.

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