Cummins Diesel Particulate Filter (DPF) Regeneration

Cummins Diesel Particulate Filter (DPF) Regeneration
Cummins Diesel Particulate Filter (DPF) Regeneration
This vehicle is equipped with a Diesel Particulate Filter as part of its exhaust after-treatment system. The DPF traps diesel
particulates and requires periodic service to ensure it functions properly. Servicing involves regeneration (burning) of
trapped particulates. The engine ECM sensors detect when regeneration is required. When regeneration is needed, the
operator must perform a “Stationary” regeneration. Not performing a regeneration when required WILL result in
damage to the vehicle exhaust system.
High Exhaust Temperature Lamp
The “HIGH EXH TEMP” lamp is on when high
exhaust temperature is detected. If it lights
during vehicle operation, the engine should be
stopped and the exhaust allowed to cool
before restarting the engine.
DPF Regeneration Needed Warning Lamps
The “DPF REGEN NEEDED” lamp indicates, when on or flashing, that the diesel
particulate filter REQUIRES regeneration. When combined with the “CHECK
ENGINE” lamp or the “STOP ENGINE” lamp, immediate operator action is
required.
DPF Regeneration Warning System
When the “DPF REGEN NEEDED” lamp is illuminated, the operator needs to perform a “Stationary Regeneration.” This
procedure must be performed in the next 2-6 hours of operation. When the lamp begins to flash, a regeneration is
required in the next 1-2 hours of operation and engine power may be reduced automatically.
If the “CHECK ENGINE” lamp is illuminated with a flashing “DPF REGEN NEEDED” lamp, the regeneration must be
performed immediately to prevent system damage. Engine power will be reduced automatically.
If the “STOP ENGINE” lamp is illuminated with a flashing “DPF REGEN NEEDED” lamp, the exhaust system has been
damaged and the vehicle must be stopped as soon as safety permits and remain shut down until serviced by an
authorized Cummins repair facility.
Diagnostic Switch to initiate a regeneration cycle.
Performing a Stationary Regeneration
1) Park the vehicle in an area where it can
safely idle for up to 50 minutes. The
regeneration period may be from 5 to 50
minutes depending on severity.
2) Set the parking brake and let the truck
idle.
3) Turn the diagnostic switch, located under
the dash below the ignition switch, to the
“ON” position. There are two switches in
the panel, the diagnostic switch is the left
one.
4) Do not throttle the engine nor apply the
brake until the regeneration is complete
and the warning lamps are off.
5) Turn the diagnostic switch to the “OFF”
position after regeneration is completed.
6) The vehicle is now ready to return to
service.
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