Cummins/Onan 12.0 RDJC — Out-Of-Service Protection (over 30 days)
Maintenance · Generator set
For the Cummins/Onan 12.0 RDJC, from the Cummins/Onan operator's manual.
Applies to: Cummins/Onan RDJC
Before you start
- Use a trickle charger to maintain battery specific gravity during storage.
Procedure
- Run set until thoroughly warm under at least 50 percent load.
- Shut down the engine.
- Disconnect starting batteries and follow standard battery storage procedures.
- Drain oil while warm; refill with clean oil and attach a caution tag.
- If exposed to freezing temperatures, drain coolant from engine, water pump and cooling system components.
- Remove flexible exhaust section and plug the engine exhaust outlet; attach warning tag.
- Service air cleaner.
- Remove glow plugs, pour 1 ounce rust inhibitor (or SAE #10 oil) into each cylinder, crank several times, reinstall glow plugs.
- Check fuel filters for presence of water.
- Clean throttle and governor linkage and protect with a clean cloth.
- Clean and wipe entire unit; coat rust-susceptible parts with light oil or grease.
- Provide a suitable cover for the entire unit.
Specs & values
- 1 ounce rust inhibitor per cylinder
Full service-parts list: Cummins/Onan RDJC →
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.