Cummins/Onan — Coolant Drain Valve - Replace
Repair & overhaul
From a Cummins/Onan service manual — check it applies to your exact model before use.
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Procedure
- Disconnect/reconnect battery
- Cooling system, drain and refill
- Remove and install coolant drain valve, fan guards
- Test run unit
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.