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Bearings and Races

    Fig 1: Identifying Bent Roller Cage
    GM1648Courtesy of GENERAL MOTORS CORP.
  1. Inspect the bearing rollers and races for the following:
    • Pitting
    • Scoring or grooves
    • Excessive wear or other damage
    2. IMPORTANT: Bearing races with any sign of heat discoloration must be replaced.
  2. Inspect the bearing rollers and races for heat discoloration. Heat discoloration ranges from a faint yellow to a dark blue color. This discoloration may result from an overload or improper lubrication. Excessive heat causes softening of the rollers and races.
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