Cummins/Onan — Electric Governor (Type I) Adjustment

Adjustments · electric governor controller (Type I)

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

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Procedure

1. Push both selector switches S1 and S2 on the controller to their OFF positions.
2. Set the pots initially: Gain 20%, I 20%, D 30%, Droop 0%.
3. If a remote speed pot is used, set it at its midpoint.
4. Start the set and adjust the Speed pot to obtain 60 Hertz (1800 RPM) or 50 Hertz (1500 RPM); warm up under load.
5. Disconnect the load and turn the GAIN pot to 100 percent or until unstable, then counterclockwise until stable.
6. Adjust D as in the previous step.
7. Adjust I as in the previous step.
8. Readjust Speed if necessary.
9. Push throttle to minimum speed and release; turn the I pot clockwise slightly to reduce overshoot or counterclockwise if the set hunts.

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.

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