Cummins/Onan 50.0 DDB 15R / 50.0 DDB 15R J 1 Q — Governor Sensitivity (Droop) Adjustment
Adjustments · Injection pump governor
For the Cummins/Onan 50.0 DDB 15R / 50.0 DDB 15R J 1 Q, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 50.0 DDB 15R, John Deere 6329D engine
Procedure
- Rotate the external knurled knob at the rear of the injector pump housing.
- Turning inward (clockwise) shortens the governor control spring, making it less sensitive and increasing speed droop.
- Turning outward (counterclockwise) has the opposite effect.
Specs & values
- Speed droop set to give 3 to 5 percent regulation from no-load to full-load; adjustment can be made with engine running
Full service-parts list: Cummins/Onan 50.0 DDB 15R →, John Deere 6329D engine →
Source: Cummins/Onan operator's 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.