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Bench Testing: Rotor

  1. Connect one ohmmeter lead to each rotor slip ring. If resistance is about 2-3 ohms, rotor is okay. If about 2-3 ohms resistance is not present, rotor is defective. Connect an ohmmeter lead to any rotor slip ring, and connect remaining lead to rotor core. If continuity exists, replace rotor assembly.
  2. Measure slip ring diameter. Minimum slip ring diameter is 1.024" (26 mm). Replace slip ring(s) if not within specification.
NOTE: To test stator or diodes, separate them by unsoldering connecting wires. Use just enough heat to melt solder. Excess heat will damage diodes.
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