Cummins/Onan — Change Fuel Filter Element (Throw-Away Type)
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
Before you start
- Mechanical tightening will distort or crack filter head.
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
- Unscrew combination case and element; discard.
- Install new O-ring if element has no integral seal.
- Fill element with fuel.
- Install new case and element; tighten by hand until seal touches filter head.
- Tighten an additional one-half turn.
Specs & values
- Single 5-3/4 inch throw-away filter after 2000 gallons; 7-1/2 inch after 3000 gallons; stack disc after 4000 gallons
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.