Cummins/Onan 10W30 — Preparing Set for Storage (Out-of-Service Protection)

Maintenance · Generator set

For the Cummins/Onan 10W30, from the Cummins/Onan operator's manual.

Applies to: Cummins/Onan GGHE, Cummins/Onan GGHF, Cummins/Onan WSG-1068 engine

Procedure

1. Exercise the set until the engine is up to operating temperature, then shut down the engine.
2. Turn off and disconnect battery charger (if equipped).
3. Disconnect battery (negative [-] first) and store in a cool, dry place; connect to charger every 30 days.
4. Drain the engine oil while still warm and refill with new oil; attach a tag indicating the type of oil used.
5. Remove the spark plugs and pour two ounces of rust preventative oil into each spark plug opening; crank five seconds and replace plugs.
6. Disconnect engine coolant heater from power source (if equipped).
7. Drain the cooling system including the engine block.
8. Remove the air cleaner and seal off the carburetor air inlet opening and PVC hose.
9. Plug the exhaust outlets to prevent entrance of moisture, bugs, dirt, etc.
10. Clean and wipe entire unit; coat parts susceptible to rust with a light coat of oil; cover entire set loosely after engine cools.

Full service-parts list: Cummins/Onan GGHE →, Cummins/Onan GGHF →

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.

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