Cummins/Onan 12.5 RDJC / 15.0 RDJC — Oil Filter Change
Maintenance
For the Cummins/Onan 12.5 RDJC / 15.0 RDJC, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan 12.5 RDJC, Cummins/Onan 15.0 RDJC, Cummins/Onan RDJC
Before you start
- Hot crankcase oil can cause burns if spilled or splashed on skin
Parts for this job
- 122-0185 Oil filter Amazon Amazon eBay $19.55 eBay NAPA $12.88
Part numbers from the service-parts list for Cummins/Onan RDJC. Verify against your serial number before ordering; some links are affiliate links.
Procedure
- Place a container under the oil filter and remove the filter by turning it counterclockwise.
- Clean the filter mounting area.
- Coat the oil filter gasket with clean oil.
- Install the new filter by turning it clockwise until the gasket touches the mounting base.
- Tighten the filter 1/2 turn.
Tools required
- Container 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 contacts base
Full service-parts list: Cummins/Onan RDJC →
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.