Cummins/Onan — Oil Filter Replacement
Maintenance
From a Cummins/Onan operator's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDJA, Cummins/Onan MDJC
Parts for this job
- REC1491758 Oil filter — Cummins/Onan MDJA Amazon eBay $30.72
- REC1491758 Oil filter — Cummins/Onan MDJC Amazon eBay $30.72
Part numbers from the service-parts lists for Cummins/Onan MDJA, Cummins/Onan MDJC. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Place a drip pan below the filter.
- Unscrew the oil filter counterclockwise using both hands or a strap-type filter wrench.
- Clean the filter mounting area.
- Install the new filter hand tight, then 1/4 turn additional using a filter wrench.
Tools required
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Specs & values
- Hand tight plus 1/4 turn.
Full service-parts list: Cummins/Onan MDJA →, Cummins/Onan MDJC →
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.