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Bench Testing: Rotor

  1. Check rotor for open field windings by using an ohmmeter across slip rings. Rotor resistance should be within specification. See GENERATOR SPECIFICATIONS .
  2. Check rotor for shorts to ground by connecting ohmmeter between slip ring and rotor shaft. Ohmmeter should indicate no continuity. Check slip rings for wear or pitting. See GENERATOR SPECIFICATIONS . If slip rings are rough or scored, replace rotor.
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