Cummins/Onan — Exercising Unit
Operation · Generator set
From a Cummins/Onan operator's manual covering: 12.0 DJC, 4.5 DJB, 4.5 DJE, 6.0 DJB, 6.0 DJE, 9.0 DJC. Check it applies to your exact model before use.
Browse Cummins/Onan generators & specs →
Before you start
- Improper exercising may cause more damage than no exercising at all
Procedure
- Perform required maintenance checks, start unit and apply a load (50 percent or more)
- After genset reaches normal operating temperature, allow it to run an additional 30 minutes
- Shut unit down after simulated return of normal power and run 3-5 minutes with no load to cool down
- Refill fuel tank and check for leaks and overall condition after each exercise period
Specs & values
- Exercise at least once each week
- Hold engine oil temperature at 180°F (82.2°C) for at least 30 minutes
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.