Cummins/Onan — Preparing Unit for Storage
Maintenance · Genset
From a Cummins/Onan service manual covering: 10C, 10CW, 10CW-150R, 5CW, 5TW-0R, 6CW-54R, 7.5C, 7.5CW, 8CW. Check it applies to your exact model before use.
Applies to: Cummins/Onan 10CW, Cummins/Onan 10CW-150R
Procedure
- Shut off fuel supply and run until stops.
- Drain oil while warm, replace drain plug.
- Remove spark plugs, pour two tablespoons rust inhibitor oil into each cylinder, crank slowly.
- Remove, clean and replace air cleaner.
- Wipe exposed parts and coat with grease.
- Oil governor linkage with SAE 5 oil.
- Plug exhaust outlet with wood plug.
- Clean generator brushes, holders, commutator and collector rings.
Full service-parts list: Cummins/Onan 10CW →, Cummins/Onan 10CW-150R →
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.