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Bench Testing: Rotor

  1. Using an ohmmeter, check rotor coil resistance across slip rings. If ohmmeter reading is greater than 3.75 ohms at 68°F (20°C), rotor is defective.
  2. If ohmmeter reading is 3.75 ohms or less at 68°F (20°C), connect an ohmmeter between one slip ring and rotor core. If continuity exists, replace rotor assembly.
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