Cummins/Onan — Fuel Filter Installation
Maintenance
From a Cummins/Onan service 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
- Replace the fuel filter and secure with 2 screws.
- Replace the fuel lines to the fuel filter (flared fittings, no sealant).
- Close the maintenance access door.
- Prime the fuel system by holding the control switch down in the stop position for at least 1 min.
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAH →, Cummins/Onan HDKAJ →, Cummins/Onan HDKAK →
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.