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Testing And Repairing: Rotor

  1. Test claw pole rotor for short circuits to ground using 40V AC tester. Measure resistance of exciter (field coil) in rotor with ohmmeter across slip rings. Resistance should be 4.0-4.4 ohms.
  2. If necessary, turn slip rings in a lathe, noting maximum runout of 0.001" (0.03 mm) and minimum diameter of 1.25" (31.5 mm). Maximum pole wheel runout should not exceed 0.002" (0.05 mm).
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