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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1767 (Transfer Case - NVG 900) >> Repair Instructions >> Transfer Case Housings Cleaning and Inspection >> Bearings and Races

Bearings and Races

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    Fig 1: Inspecting Bearing Rollers & Races
    GM939465Courtesy of GENERAL MOTORS CORP.
  1. Inspect the bearing rollers and races for the following:
    • Pitting
    • Scoring or grooves
    • Excessive wear or other damage
  2. Fig 2: Inspecting Bearing Rollers & Races For Heat Discoloration
    GM1458Courtesy of GENERAL MOTORS CORP.
  3. Inspect 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. Bearing races with a sign of heat discoloration must be replaced.