Important Guidelines For F-650/F-750 Diesel Particulate Filter Regeneration

The 2010 and 2011 F-650/F-750 Super Duty chassis cabs are equipped with a diesel particulate filter (DPF), as part of the after-treatment exhaust system, to trap soot and other large particles produced by the engine combustion process.

The soot that accumulates in the filter must be periodically reduced to ash to prevent excessive exhaust restriction. The soot reduction process, also known as “filter regeneration”, is generally performed automatically by the engine and after-treatment system.


The normal operating temperature of the exhaust system is very high. Never work around, or attempt to repair, any part of the exhaust system until it has cooled. Use special care when working around the diesel particulate filter. The DPF heats up to a high temperature after only a short period of engine operation, and can remain hot even after the engine is turned off. Failure to follow these instructions may result in personal injury.


The following description is applicable to 2008-2011 Cummins engines. For 2008-2010 Caterpillar engines, see the Owners Guide.

Under most operating conditions, DPF regeneration will be transparent to the operator. An increase in engine/turbo sound level is normal during filter regeneration.

If, however, the engine is operating for extended periods of time under one of the following conditions, operator assistance may be required to facilitate the filter regeneration process:

  • Vehicle is operated in stop-and-go traffic and/or maintains low speeds as in city/delivery driving
  • Engine is started and shut-off frequently
  • Vehicle payload is relatively light
  • Vehicle is regularly operated in cold ambient temperatures (i.e. below 0° F [-18 C])

Instrument cluster lamp(s) will illuminate and/or flash when operator assistance is required. In addition, engine performance will become increasingly limited above Level 1.

At Levels 1 and 2, two courses of action may be taken by the operator to facilitate filter regeneration:

  1.      The vehicle may be driven on the highway at highway speeds.
  2.     The operator may perform a parked regeneration by following the steps in Parked regeneration procedure.

At Level 3, performing a parked regeneration is the only available course of action (short of professional servicing) available to the operator for regenerating the filter.

At Level 4, professional servicing is the only way to regenerate the filter.


Warning: When performing the parked regeneration procedure, make sure the vehicle is safely off the roadway, and the exhaust system is away from people, or any flammable materials, vapors, or structures. Engine speed may increase during parked regeneration.

Note: Parked regeneration is only available when the DPF lamp on the instrument cluster is illuminated (solid or flashing).

  1.      Bring the vehicle to a complete stop on level ground and safely off the road with the exhaust system away from people, flammable materials, vapors or structures.
  2.       If your vehicle is equipped with an automatic transmission and a steering column shift lever, place transmission in P (Park). Otherwise, place the transmission in N (Neutral).
  3.    Remove feet from the accelerator pedal and clutch pedal (if equipped).
  4.      Set the parking brake.
  5.      Within 5 seconds of setting the parking brake, remove foot from the service brake pedal.

The engine speed may also increase slightly. To allow parked regeneration to continue uninterrupted:

  1.     The vehicle must remain parked.
  2.     The accelerator pedal, service brake pedal, and clutch pedal (if equipped) must not be depressed.
  3.     The parking brake must remain set.

On average (depending on filter level and other factors), the process will take 20-30 minutes to complete. The DPF lamp will turn off when the process is complete. Repeat Steps 1-5, if parked regeneration is interrupted.


Depress any of the floor pedals to discontinue parked regeneration.


The DPF is designed to retain a relatively large amount of residual ash and provide many miles and hours of maintenance-free operation. At some point, generally beyond 150,000 miles (240,000 km) or 5000 hours of operation (whichever comes first), the DPF will require professional cleaning to remove the accumulated ash. The exact number of miles or hours of operation will vary greatly depending upon vehicle/engine loading and operating conditions, ash content of the engine oil, and quality of the diesel fuel used in your truck. Adhering to your engine manufacturer’s recommended oil and fuel specifications will maximize the miles and hours of operation before the DPF professional cleaning is required. Refer to your engine manufacturer’s owner’s manual for more details regarding recommended maintenance and service of your DPF.

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