Cummins/Onan — Disconnecting Generator Set Systems
Maintenance
From a Cummins/Onan service manual — check it applies to your exact model before use.
Applies to: Cummins/Onan MDKAD, Cummins/Onan MDKAE, Cummins/Onan MDKAF
Before you start
- Leakage of fuel presents fire or explosion hazard.
- Generator sets are heavy and can cause injury if dropped.
Procedure
- Disconnect negative battery cable at battery terminal.
- Disconnect positive battery cable from wire harness.
- Disconnect remote control plug wire if applicable.
- Disconnect generator load wires and tag for identification.
- Shut all valves leading outside vessel that might admit flotation water.
- Disconnect exhaust system and support brackets or hangers.
- Disconnect sea water cooling system and supports.
- Disconnect fuel lines at genset housing and plug ends.
- Verify set is adequately supported before loosening mounting bolts or supports.
Full service-parts list: Cummins/Onan MDKAD →, Cummins/Onan MDKAE →, Cummins/Onan MDKAF →
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.