Cummins/Onan — Test - Rotor Windings
Testing & diagnosis
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Visual inspection
- Disconnect/reconnect battery
- Gain access to rectifier plates
- Disconnect/reconnect main rotor lead(s)
- Check for shorts
- Measure winding resistance
Source: Cummins/Onan service manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.