Cummins/Onan — Fuel-Water Separator - Draining
Maintenance
From a Cummins/Onan owner's manual covering: K1800, K2000E, K38, K50, KT38, KTA 50 G3, KTA-50G3, KTTA50, KtA38, KtA50, KttA38. Check it applies to your exact model before use.
Applies to: Cummins/Onan K38, Cummins/Onan K50, Cummins/Onan KTA-50G3, Cummins/Onan KTA38, Cummins/Onan KTA50
Before you start
- Do not overtighten the valve. Overtightening can damage the threads.
Procedure
- Shut off the engine.
- Open the drain valve by hand, turning counterclockwise 1-1/2 to 2 turns.
- Drain the filter sump until clear fuel is visible.
- Turn the valve clockwise 1-1/2 to 2 turns to close.
Full service-parts list: Cummins/Onan K38 →, Cummins/Onan K50 →, Cummins/Onan KTA-50G3 →, Cummins/Onan KTA38 →, Cummins/Onan KTA50 →
Source: Cummins/Onan owner'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.