Cummins/Onan — Replaceable Element Fuel Filter
Maintenance
From a Cummins/Onan service manual covering: V12 Series, V6-140, V6-200, V6-VAL, V6-VIM, V8-185, V8-265, V8-350, V8-VALE, V8-VINE, VT12, VT8-430. Check it applies to your exact model before use.
Applies to: Cummins/Onan V12 Series
Parts for this job
Part numbers from the service-parts list for Cummins/Onan V12 Series. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Remove drain plug from bottom of filter case and drain; install drain plug.
- Loosen nut at top of fuel filter; take out dirty element, clean case.
- Install a new element.
- Install new gasket in filter head and assemble case and element.
- Fill filter case with clean fuel.
- Tighten center bolt to 20/25 foot-pounds with a torque wrench.
- Check fittings in filter head for leaks.
Tools required
- Torque wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Center bolt 20/25 foot-pounds; fittings 30/40 foot-pounds
Full service-parts list: Cummins/Onan V12 Series →
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.