Cummins/Onan — Raw Water Pump Priming
Maintenance
From a Cummins/Onan operator's manual covering: 5.0 MDKUB, 6.0 MDKUB, 7.5 MDKWB, 9.0 MDKWB. Check it applies to your exact model before use.
Applies to: Cummins/Onan 5.0 MDKUB, Cummins/Onan 6.0 MDKUB, Cummins/Onan 7.5 MDKWB, Cummins/Onan 9.0 MDKWB, Cummins/Onan MDKUB, Cummins/Onan MDKWB, Kubota Z482B engine, Kubota D722B engine
Procedure
- Close sea cock.
- Remove hose from water filter outlet.
- Fill hose and pump with clean water.
- Replace hose and open sea cock.
- Check pump operation on start-up by observing water discharge from exhaust outlet.
Specs & values
- Raw water flow at exhaust outlet should be about 3 gal/min (11.4 liter/min)
Full service-parts list: Cummins/Onan 5.0 MDKUB →, Cummins/Onan 6.0 MDKUB →, Cummins/Onan 7.5 MDKWB →, Cummins/Onan 9.0 MDKWB →, Cummins/Onan MDKUB →, Cummins/Onan MDKWB →, Kubota Z482B engine →
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.