Cummins/Onan — Change Engine (Bag Type) Full Flow Filter
Maintenance · Lubricating oil filter
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
- Do not remove case.
- Do not attempt to wash and re-use filter bag.
- Make certain cover capscrews are drawn down evenly to assure a good seal between cover and case.
Procedure
- Drain full-flow filter by removing drain plugs (all except V8-350 & VT8-430).
- For V8-350/VT8-430 remove upper socket head pipe plug and attach drain hose.
- Loosen filter cover capscrews carefully; element spring forces cover up.
- Drain oil from case and withdraw element.
- Turn used bag inside out and inspect for bearing metal, grit.
- Clean all parts except bag, gaskets and O-rings.
- Install a new filter bag.
- Insert element, spring end down; position case to cover with new O-ring(s).
- Tighten capscrews evenly to assure good seal.
- Add approximately one gallon clean lubricating oil to fill filter case.
- Check engine oil level and bring to 'H' mark.
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.