Cummins/Onan HDKAG — Testing for Grounded Rotor

For the Cummins/Onan HDKAG.

Browse Cummins/Onan generators & specs →

Procedure

1. Isolate the rotor windings by disconnecting the two leads to the brush holder.
2. Connect test leads between each ring and the 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 a grounded rotor with a new identical part.

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.