Cummins/Onan — Cooling System − Drain And Fill
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA, Cummins/Onan HDKAJ, Cummins/Onan HDKAK
Procedure
- Drain and refill cooling system
- Visually check radiator cap
- Test run for proper operation
Specs & values
- SRT 08-107
- 0.3 hours
Full service-parts list: Cummins/Onan HDKA →, 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.