Unnecessary or excessive use of the Regeneration Inhibit Switch will result in a loss of fuel
economy, or an increased need for parked regeneration.
How To Perform A Parked (Stationary) Regeneration
If the vehicle has a Manual Regeneration Switch and the DPF Lamp is flashing:
● Park vehicle in an appropriate location, set parking brake, and place transmission in Park
or Neutral, and allow up to one hour for regeneration.
● Set up a safe exhaust area. Confirm that nothing is on or near the exhaust system surfaces.
● Ensure that your fast-idle and Power Take-Off switches are off before starting regeneration.
● Push the Manual Regeneration Switch to begin a parked regeneration. Note: Engine
speed will increase, and there may be a noticeable change to the sound of the
turbocharger during the regeneration process. Once the DPF is regenerated, the engine will
automatically return to the normal idle speed.
● Monitor the vehicle and surrounding area during regeneration. If any unsafe condition
occurs, shut off the engine immediately. To stop a parked regeneration, depress the clutch,
brake or throttle pedal.
● Once the regeneration is complete, exhaust gas and exhaust surface temperatures will
remain elevated for 3 to 5 minutes.
Fuel, Oil and DEF
● Use only Ultra-Low Sulfur Diesel (ULSD) Fuel
● CJ-4 (low ash) is the recommended oil.
● Be sure to check the DEF gauge at every refueling. Cummins recommends topping off
the DEF tank when refueling. DEF meeting ISO 22241-1 must be used.
● Put only DEF in the DEF tank, which has a blue cap.
T300-1_T500-1_T780
Operating Instructions
216 P/N 12261-683
REVISED: January 2015
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