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Home›Repair guides›Rotor Insulation Testing

Cummins/Onan HDKAG — Rotor Insulation Testing

For the Cummins/Onan HDKAG.

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Procedure

  1. Isolate rotor windings by disconnecting two leads to brush holder.
  2. Connect test leads between each ring and rotor shaft in turn.
  3. Meter should register 100,000 ohms or greater.
  4. If less than 100,000 ohms, rotor is questionable.
  5. Thoroughly dry the rotor and retest.
  6. Replace grounded rotor with new identical part.

Tools required

  • Digital ohmmeter

Specs & torque values

  • 100,000 ohms or greater

Source: manual:0981-0516-i9-hdkag-service-manual.pdf. Figures and steps are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.