Cummins/Onan — Draining/Replacing Fuel Filters
Maintenance · Fuel system
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKB, Kubota D1105 engine, Kubota V1505 engine, Kubota V2003m engine, Kubota V2403M engine, Kubota V3300-E2B engine
Before you start
- Diesel fuel is combustible and can cause severe personal injury or death. Accidental or remote starting can cause severe personal injury or death.
Procedure
- Drain water and sediment from the water-separator type fuel filter.
- Disconnect the negative (-) battery cable, close fuel supply and return valves.
- Spin off the old filter with a filter wrench and dispose of it properly.
- Clean the filter base contact surface, lubricate the new gasket and spin the new filter on hand tight.
- Prime the engine for at least 30 seconds to fill the new filter.
- Run the generator a few minutes, shut it down and check for leaks; tighten the filter by hand if necessary.
Tools required
- Filter wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Full service-parts list: Cummins/Onan MDKB →, Kubota D1105 engine →, Kubota V3300-E2B 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.