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Generator Inner Parts: Rotor

  1. Measure the resistance between the slip rings using a tester.
    • If not within the specification, replace the rotor.

    Generator rotor resistance (between slip rings) [20°C {68 °F}] 

    1.8-2.2 ohm 

    Fig 1: Measuring Resistance Between Slip Rings Using With Tester
    G04859733Courtesy of MAZDA MOTORS CORP.
  2. Verify that there is no continuity between the slip ring and core using a tester.
    • If there is continuity, replace the rotor.
  3. Inspect the slip ring surface condition.
    • If the slip ring surface is rough, use a lathe or fine sandpaper to smooth it.
      Fig 2: Measuring Continuity Between Slip Ring And Core Using With Tester
      G04859734Courtesy of MAZDA MOTORS CORP.
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