Cummins/Onan — Troubleshoot − Coolant Loss (External)
Testing & diagnosis · Cooling system
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan HDKA
Procedure
- Check coolant level
- Check cracked or leaking hoses
- Check loose hose clamps
- Check radiator for leaks
- Check coolant in oil
- Perform checks in step 01
- Pressure test coolant system
- Run generator set and check for leaks
Specs & values
- SRT 00−010
- Step 01 time 0.3 h
- Step 02 time 0.5 h
Full service-parts list: Cummins/Onan HDKA →
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.