Cummins/Onan A15 — Governor Adjustments (Type A Electric Governor)
Adjustments
For the Cummins/Onan A15, from the Cummins/Onan service manual.
Applies to: Cummins/Onan DGBB, Cummins/Onan DGBC, Cummins/Onan DGCA, Cummins/Onan DGCB, Cummins/Onan DGCC, Cummins/Onan DGDA, Cummins/Onan DGDB, Cummins/Onan DGEA, Cummins/Onan DGFA, Cummins/Onan DGFB, Cummins/Onan B and C Series diesel engine
Procedure
- Set selector switch S1 to OFF, S2 to appropriate model position.
- Set pots initially: Gain 20%, I 20%, D 30%, Droop 0%.
- Start set, adjust Speed pot for required frequency (60Hz=1800RPM or 50Hz=1500RPM) at operating temperature.
- Disconnect load, turn Gain pot to 100% or until unstable, then back off until stable.
- Adjust D and I pots similarly; readjust Speed if necessary.
- Push throttle to minimum speed, release and observe overshoot (2-5 Hz acceptable); adjust I pot to reduce overshoot or hunting.
Specs & values
- Gain 20%, I 20%, D 30%, Droop 0% initial settings
Full service-parts list: Cummins/Onan DGBB →, Cummins/Onan DGBC →, Cummins/Onan DGCA →, Cummins/Onan DGCB →, Cummins/Onan DGCC →, Cummins/Onan DGDA →, Cummins/Onan DGDB →, Cummins/Onan DGEA →, Cummins/Onan DGFA →, Cummins/Onan DGFB →
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.