Cummins/Onan — Priming the Fuel System (Low-Pressure Side)
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAA, Cummins/Onan MDKAB, Cummins/Onan MDKAL, Kubota D1005 engine, Kubota D1105 engine, Kubota V1305 engine, Kubota V1505 engine
Before you start
- High pressure oil spray from an injector line fitting can penetrate the skin.
Procedure
- Hold control switch in stop position to prime via fuel lift pump during preheat.
- If 20 seconds of priming is not enough, open the bleed screw.
- Disconnect engine harness lead from glow plugs and insulate it.
- Press STOP until fuel just appears at the bleed opening.
- Tighten bleed screw and reconnect lead to the glow plugs.
Specs & values
- Preheat no more than 20 seconds at a time; let glow plugs cool one minute
Full service-parts list: Cummins/Onan MDKAA →, Cummins/Onan MDKAB →, Cummins/Onan MDKAL →, Kubota D1005 engine →, Kubota D1105 engine →, Kubota V1305 engine →
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.