Ford F-650 Owner's Manual page 109

in the system, it begins to restrict the filter.
You need to periodically clean the soot
that gathers inside the filter. You can clean
the soot in two different ways, passive
regeneration and active regeneration. Both
methods occur automatically and require
no actions from the driver. During either
one of these regeneration methods, you
may notice a change in exhaust tone. At
certain times, the information display
shows various messages related to the
diesel particulate filter. See Information
Displays (page 62).
Do not disregard the following maintenance messages:
Message
Exhaust filter overloaded
Drive to clean
Exhaust filter at limit
Clean now
Failure to perform active or Operator
Commanded Regeneration when
instructed could result in a clogged diesel
particulate filter. If your diesel particulate
filter fills beyond the regeneration
threshold, your vehicle disables the ability
for active and Operator Commanded
Regeneration. This could result in
irreversible damage to the filter requiring
replacement that your warranty may not
cover. If your vehicle is not equipped with
Operator Commanded Regeneration,
check with your dealer for availability.
F650750 (TBC), enUSA, First Printing
Fuel and Refueling
Passive Regeneration
In passive regeneration, the exhaust
system temperature and constituents
automatically clean the filter, or reduce
the soot level, by burning (oxidizing) the
soot. Cleaning occurs naturally because of
normal engine operating conditions (at
varying levels, due to driving patterns).
Diesel Particulate Filter Maintenance
You must properly maintain your vehicle's
diesel particulate filter in order for it to
function properly.
Action and Description
This may degrade vehicle performance and could lead to
engine damage that may not be covered by the vehicle
Warranty.
Once the diesel particulate filter is full of
exhaust particles, the engine control
module commands the exhaust system to
clean the filter through a process called
active regeneration. Active regeneration
requires the engine computer to raise the
exhaust temperature to eliminate the
particles. During cleaning, the particles
convert to harmless gasses. Once cleaned
the diesel particulate filter continues
trapping exhaust particles.
The regeneration process operates more
efficiently when you safely operate your
vehicle at least 30 mph (48 km/h) with a
steady pedal for approximately 20 minutes
to complete the process. The frequency
and duration of regeneration fluctuates by
how you drive your vehicle, outside air
temperature, and altitude. For most driving,
106
I n f o r ma t i o n P r o v i d e d b y :