Cummins/Onan — Draining oil
Maintenance · Engine oil drain hose / valve
From a Cummins/Onan operator's manual covering: C20 N6, C22 N6, C25 N6, C30 N6, C30 N6H, C36 N6, C36 N6H, C40 N6, C40 N6H, C45 N6H, C50 N6H, C60 N6H. Check it applies to your exact model before use.
Applies to: Cummins/Onan C20 N6, Cummins/Onan C22 N6, Cummins/Onan C25 N6, Cummins/Onan C30 N6, Cummins/Onan C36 N6, Cummins/Onan C40 N6, Cummins/Onan C45 N6H, Cummins/Onan C50 N6H, Cummins/Onan C60 N6H
Before you start
- Ensure that the generator set engine has cooled down before adding or draining the oil.
Procedure
- Detach the oil drain hose from the side of the engine.
- Place the end of the drain hose into an appropriate container.
- Open the oil drain valve to release oil from the engine into the container.
- Recheck the engine oil level. Based on results, add or drain oil.
- Close the oil drain valve, wipe it clean, and re-attach the drain hose.
- Dispose of the used oil in accordance with local/state regulations.
Full service-parts list: Cummins/Onan C20 N6 →, Cummins/Onan C22 N6 →, Cummins/Onan C25 N6 →, Cummins/Onan C30 N6 →, Cummins/Onan C36 N6 →, Cummins/Onan C40 N6 →, Cummins/Onan C45 N6H →, Cummins/Onan C50 N6H →, Cummins/Onan C60 N6H →
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.