Cummins/Onan — Cooling System - Drain (01-06)
Maintenance
From a Cummins/Onan service manual covering: K 19, K19, KTA19, KTA19-M, KTA19G2, KTTA19, Kt19. Check it applies to your exact model before use.
Applies to: Cummins/Onan K 19, Cummins/Onan Kt19, Cummins/Onan K19 engine
Before you start
- Wait until the temperature is below 50°C before removing the coolant system pressure cap. Failure to do so can cause personal injury from heated coolant spray.
Procedure
- Position the vehicle on level ground. Wait until coolant temperature is below 50°C before removing the pressure cap.
- Remove the radiator cap after the engine is cool.
- Open the radiator draincock.
- Remove the lower radiator hose(s).
- Open the water pump draincock.
- Open the oil cooler draincock.
Full service-parts list: Cummins/Onan K 19 →, Cummins/Onan Kt19 →
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.