Cummins/Onan — Out-of-Service Protection (over 30 days)
Maintenance · Generating set
From a Cummins/Onan operator's manual covering: 40.0DDB-515R, 50.0DDB-15R, 50.0DDB-9XR. Check it applies to your exact model before use.
Applies to: Cummins/Onan 40.0DDB-515R, Cummins/Onan 50.0DDB-15R, Cummins/Onan 50.0DDB-9XR, John Deere 6329D engine, John Deere 6329D (300-6329D) engine
Procedure
- Run set until thoroughly warm.
- Drain oil from oil base while still warm; refill and attach warning tag stating oil viscosity used.
- Remove each injector; pour 1 ounce (two tablespoons) rust inhibitor or SAE #10 oil into each cylinder.
- Crank engine over several times; install injectors.
- Service air cleaner.
- Clean throttle linkage and protect with a clean cloth.
- Plug exhaust outlets to prevent moisture, bugs and dirt.
- Wipe entire unit; coat rust-susceptible parts with light film of grease or oil.
- Disconnect battery and follow standard battery storage procedure.
- Provide a suitable cover for the entire unit.
Full service-parts list: Cummins/Onan 40.0DDB-515R →, Cummins/Onan 50.0DDB-15R →, Cummins/Onan 50.0DDB-9XR →, John Deere 6329D engine →, John Deere 6329D (300-6329D) 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.