Cummins/Onan — Replacing Fuel Filter Element
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKUB, Cummins/Onan MDKWB, Kubota Z482B engine, Kubota D722B engine
Procedure
- Loosen the drain valve and bleed screws, collect fuel, remove the bleed plug.
- Remove filter element from the head with the bowl connected.
- Clean the bowl, O-ring and O-ring gland.
- Lubricate the O-ring with clean diesel fuel and place it in the bowl gland.
- Tighten the drain valve.
- Spin the bowl onto the new element; do not over-tighten.
- Lubricate the element and gasket and fill bowl and element with clean diesel fuel.
- Spin the bowl and element assembly onto the head and hand tighten.
- Disconnect the starter solenoid lead at the Faston terminal connector.
- Depress the Start switch until fuel purges at the bleed screw and bleed plug opening.
- Replace the bleed plug, close bleed screw and reconnect the starter solenoid lead.
Full service-parts list: Cummins/Onan MDKUB →, Cummins/Onan MDKWB →, Kubota Z482B 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.