Navistar ProStar+, Operation And Maintenance Manual

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Operation
Exhaust Diesel Particulate Filter Regeneration
This vehicle is equipped with a Diesel Particulate Filter
(DPF) to meet 2010 emissions requirements. The DPF traps
exhaust particulate matter generated by normal engine usage.
Periodically, the engine control system will perform a “cleaning”
of the filter, known as Normal Regeneration. This process is
transparent to the operator and occurs during normal vehicle
operation.
In some cases the engine control system is unable to manage
soot levels in the DPF through Normal Regeneration. When
this occurs the DPF indicator will illuminate solid YELLOW on
the instrument panel gauge cluster advising that action must be
taken. At this time the vehicle should then be driven at highway
speeds, or pulled over to perform a Parked Regeneration (See
Parked Regeneration Procedure).
If no action is taken during the previous warning stage, the
DPF indicator will begin to flash indicating that the filter is full.
The vehicle should then be pulled safely off the roadway and a
Parked Regeneration should be performed.
If the vehicle is driven beyond the initial two warning stages,
a loss of engine performance (derate) will occur. Ignoring the
need for a Parked Regeneration, when required, can result in a
warning for excessive exhaust temperatures, and a requirement
to shut the engine off and not restart it until the DPF has been
serviced by a technician. It is important to perform a Parked
Regeneration when required. Failure to do so could be mission
disabling and result in the vehicle being towed.
See the following information for a detailed explanation of DPF
indicators and the corresponding procedures that must be
followed.
WARNING
To prevent property damage, personal injury, and
/ or death, do not perform a Parked Regeneration
when Diesel Particulate Filter (DPF) indicator is
ON as this will cause the engine to lose power and
eventually shut down.
When performing Parked Regeneration, make
certain vehicle is safely off of the roadway
and exhaust pipe is away from people, or any
flammable materials or structures.
Failure to follow these instructions may result
in a loss of engine power and vehicle speed,
increased exhaust temperatures, and an accident
or fire.
There will be three levels of indication that the vehicle’s exhaust
filter is accumulating soot and needs to be cleaned, each with
an increasing urgency for action.
NOTE: A Level 1 indication may disappear or a Level 2 may
revert to a Level 1, if the vehicle is driven on highway at
highway speeds for an extended period. This process of
auto regeneration of the exhaust filter is activated when
the engine load is increased as a result of highway driving
at highway speeds. If the DPF indicator does not reduce
in level or disappear, a Parked Regeneration must be
performed.
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