Cummins/Onan — Priming Low Pressure Fuel System
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan DGAB, Cummins/Onan DGAC, Cummins/Onan DGAD, Cummins/Onan DGAE, Cummins/Onan 4A2.3 engine, Cummins/Onan 6A3.4 engine, Cummins/Onan 6AT3.4 engine
Before you start
- Keep fuel system clean and free of water and dirt.
Procedure
- Check fuel level in fuel tank and open shutoff valve.
- Loosen fuel filter to injection pump line at injection pump fuel inlet fitting.
- Actuate priming lever on transfer pump until fuel flows from fitting.
- Tighten fuel line at injection pump inlet.
Full service-parts list: Cummins/Onan DGAB →, Cummins/Onan DGAC →, Cummins/Onan DGAD →, Cummins/Onan DGAE →
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.