Cummins/Onan 20W-20 — Oil Filter Change
Maintenance
For the Cummins/Onan 20W-20, from the Cummins/Onan service manual.
Applies to: Cummins/Onan 20W-20, Cummins/Onan RDJF engine
Parts for this job
- 122-0193 Oil filter Amazon eBay $18.32 NAPA $10.64
Part numbers from the service-parts list for Cummins/Onan 20W-20. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Place pan under old filter and remove by turning counterclockwise.
- Clean filter mounting area.
- Lubricate gasket on new filter with oil.
- Screw filter on clockwise until gasket touches mounting base.
- Tighten 1/2 turn.
Tools required
- Filter wrench Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Tighten 1/2 turn after gasket contact
Full service-parts list: Cummins/Onan 20W-20 →
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.