Cummins/Onan — Draining / Changing Fuel Filter
Maintenance · Fuel filter (water separator type)
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAV, Cummins/Onan MDKAW, Cummins/Onan MDKAZ, Cummins/Onan MDKB, Kubota D1105 engine, Kubota V1305 engine, Kubota V1505 engine, Kubota V1903B engine, Kubota V2203B engine, Kubota V2803B engine
Before you start
- Diesel fuel is combustible; keep ignition sources away
- Disconnect negative battery cable to prevent accidental starting
Procedure
- Disconnect negative battery cable and close fuel supply valve.
- Remove access door if enclosure is fitted.
- Drain about 1/2 cup (120 ml) through drain plug at bottom of filter.
- Reinstall drain plug and dispose of drain-off properly.
- To change: spin off old filter and dispose of it.
- Clean filter base, lubricate new gasket, spin on hand tight.
- Prime engine at least 30 seconds and check for leaks.
Tools required
- Suitable container Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Drain-off about 1/2 cup (120 ml)
Full service-parts list: Cummins/Onan MDKAV →, Cummins/Onan MDKAW →, Cummins/Onan MDKAZ →, Cummins/Onan MDKB →, Kubota D1105 engine →, Kubota V1305 engine →, Kubota V1903B 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.