Cummins/Onan — Replacing Engine Air Filter
Maintenance
From a Cummins/Onan owner's manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAH, Cummins/Onan HDKAJ, Cummins/Onan HDKAK
Procedure
- Remove outer and inner cover
- Remove dirty filter element
- Insert new air filter element with spacer seal
- Reassemble inner cover
- Turn inner cover wingnut 3-4 clicks past seating
- Seat outer cover and tighten its wingnut
- Check for noise when running and retighten if necessary
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAH →, Cummins/Onan HDKAJ →, Cummins/Onan HDKAK →
Source: Cummins/Onan owner'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.