Cummins/Onan — Breaking in a New Engine
Operation
From a Cummins/Onan operator'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
- Run genset at approximately 1/2 rated power for first 2 hours.
- Run at 3/4 rated power for 2 more hours.
- Check oil level twice a day or every 4 hours first 24 hours.
- Change oil and oil filter after the first 50 hours.
Specs & values
- 1/2 rated power for 2 hours
- 3/4 rated power for 2 hours
- Change oil and filter after 50 hours
Full service-parts list: Cummins/Onan HDKA →, Cummins/Onan HDKAH →, Cummins/Onan HDKAJ →, Cummins/Onan HDKAK →
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.