Cummins/Onan — Droop Adjustment

Adjustments · governor

From a Cummins/Onan service manual — check it applies to your exact model before use.

Applies to: Cummins/Onan NHEL

Procedure

1. Connect rated load; load watts = volts x amps (1.0 power factor).
2. Check droop from no-load frequency.
3. If droop more than 3 Hz (BGE) or 4 Hz (NHE), turn governor sensitivity screw one turn counterclockwise.
4. Disconnect load and readjust governor speed screw to 62-63 Hz no-load if necessary.
5. If droop less than 2 Hz (BGE) or 3 Hz (NHE), turn sensitivity screw one turn clockwise.
6. Check governor response under 1/4, 1/2 and 3/4 rated loads.

Full service-parts list: Cummins/Onan NHEL →

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.

More Cummins/Onan repair guides →