PETERBILT OPERATOR’S MANUAL SUPPLEMENT
Peterbilt Operator’s Manual Supplement
This supplement contains information that is not included in your current P eterbilt Operator's Manual. This supplement is
in addition to the information contained in the Peterbilt Operator's Manual and applies to all Peterbilt Models equipped
with 2007 EPA compliant engines.
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EMISSIONS
Emissions
After-Treatment System Description
NOTE: The emission warning lamps and emission
switch functions described below super sede those
listed in the Engine manufacturer's Operator and
Maintenance manual. For additional Emissions
Aftertreatment information specific to your engine,
see the Engine manufacturer's Operation and
Maintenance Manual supplied in your vehicle. All
other lamp and switch functionality described in
the manual are still valid.
In order to meet 2007 EPA engine emission requirements ,
vehicles will have an exhaust After-Treatment System
(ATS) which includes a Diesel Par ticulate Filter (DPF),
Regeneration Switch and warning lights. The DPF will
trap soot from the engine exhaust gases. The ATS will
periodically clean the DPF.
The Regeneration Switch is mounted on the dash and can
override the ATS. Various situations may require the
operator to use the functions of this switch. Refer to
“Parked Re gen eration” on page 7 and “Stop an Automatic
or Parked Regeneration” on page 9 for more information.
ATS specific warn ing lights and indicator symbols appear
on the dash panel, abov e the air cond itioning con trols an d
radio.
ATS Warning Light and Indicator Symbols
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EMISSIONS FUNCTIONALITY / NOTIFICATION INFORMATION
Functionality / Notification
Information
The ATS will clean the DPF by using hot exhaust gases
normally generated by the engine. This typically occurs
during highway operation. This is referred to as a "Passive" Regeneration and is transparent to the operation of
the vehicle.
Occasionally, the exhaust gases are too cool for passive
regeneration. When this occurs, the ATS will clean the
DPF by increasing the exhaust temperature. This is
referred to as an "Automatic" Regeneration and is also
transparent to the operation of vehicle. An Automatic
Regeneration ev ent typically lasts 30 minutes . During and
shortly after the event, the exhaust gases from the DPF
may reach temperatures in e xcess of 650 C (1200 F). See
the information in the table below on probable causes and
recommended actions related to the warning lights and
indicator symbols of the ATS.
The ATS may not be able to clean the DPF when the vehi cle is driven at extended low speeds or with frequent start
and stops. In such cases, warning lights and indicator
symbols will alert the operator to take action. The operator
should be aware of whether the lights are on alone or in
combination with others. The following table will describe
each warning light(s) and what actions are needed from
the operator.
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FUNCTIONALITY / NOTIFICATION INFORMATION EMISSIONS
Notification of High Exhaust System Temperature:
Indicator Information What to do
On-Steady The High Exhaust T emperature (HEST) warning
lamp will illuminate, regardless of A TS status, as
the vehicle's exhaust outlet temperature
becomes extremely hot (at least 450 deg C /
842 deg F) and subsequently the vehicle speed
slows to below 5 mph / 8 kph.
This will typically occur when:
An Automatic or Parked Regeneration is in pro-
cess
or
During normal vehicle operation when engine is
under high or heavy loading
Follow all warnings listed below. Use the STOP function of the
Regeneration Switch if the situation requires. Follow the instructions
described “Stop an Automatic or Parked Regeneration” on page 9
WARNING! Temperatures of the exhaust pipes and at
the outlets of the exhaust system during and shortly
after a regeneration event will be extremely hot. If the
High Exhaust System Temperature (HEST) warning
lamp is on:
• Do not park in an area of combustible vapors or materials. You must keep combustibles at least five (5) feet
away from the side and top of the vehicle while the
HEST light is illuminated. Always park your vehicle
outside. Failure to do so could ignite an explosion or
harm bystanders which could result in serious injury.
• Do not park in an area where people are close by. You
must keep bystanders at least five (5) feet away from
the exhaust outlet while the HEST light is illuminated.
Failure to do so could result in serious injury.
• The exhaust piping, diesel particular filter (DPF) or tail
pipe become extremely hot during engine operation
or any regeneration event and can cause serious
burns to the skin. Allow adequate cooling time before
working on or near any part of the exhaust system.
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EMISSIONS FUNCTIONALITY / NOTIFICATION INFORMATION
Notification That Regeneration Is Required:
Indicator Information What to do
On Steady The DPF status indicator symbol will illu-
minate when the soot level in the DPF is
above the desired level and it needs
cleaning.
Blink once
every second
Blinking
On Steady
The DPF status indicator symbol will blink
when the soot level in the DPF continues
to stay above the desired level and it
needs cleaning.
The DPF status indicator symbol will blink
when the soot level in the DPF continues
to stay above the desired level and it
MUST be cleaned.
The engine will de-rate power.
The DPF needs cleaning soon. Follow the instructions described “Cleaning the DPF” on page 7
NOTE: If you ignore the warning lamp and do not initiate
regeneration at the soonest, safest possible time, the DPF
will become increasingly clogged with soot and can lead to
engine shutdown.
Clean the DPF as soon as safely possible. Follow the instructions
described “Cleaning the DPF” on page 7
CAUTION: If you do not initiate regeneration after the DPF
Indicator lamp is blinking, you only have a short time before
the check engine light will illuminate and the engine will go
into protection mode and de-rate power.
Clean the DPF immediately. Follow the instructions described “Cleaning
the DPF” on page 7.
CAUTION: If you do not initiate regeneration after the DPF
Indicator lamp is blinking and the check engine light is illuminated, you only have a short time before the stop engine
light will illuminate and the engine will automatically begin
to shutdown.
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FUNCTIONALITY / NOTIFICATION INFORMATION EMISSIONS
Indicator Information What to do
Blinking
On Steady
On Steady
On Steady (Cummins Engine)
(Caterpillar Engine)
The DPF status indicator symbol will blink
when the soot level in the DPF continues
to stay above the desired level
The soot level in the DPF is now at full
capacity.
The Stop Engine light is illuminated when
the soot level in the DPF continues to stay
above the desired level
The soot level in the DPF is now at full
capacity.
At this point, you CANNOT clean the DPF and the engine will begin a shutdown sequence.
WARNING! If the Stop Engine warning lamp illuminates, it
means you have a serious engine system problem. This
should be considered an emergency. You should stop the
vehicle as safely as possible and turn OFF the ignition. The
vehicle must be serviced and the problem corrected before
driving again. Failure to do so may cause severe engine,
DPF damage or personal injury.
NOTE: The engine shutdown sequence is engine specific;
therefore to learn how this works on your vehic le, refer to the
Engine Manufacturer's Operation and Maintenance Manual
supplied with your vehicle.
At this point, you CANNOT clean the DPF and the engine will begin a shutdown sequence.
WARNING! If the Stop Engine warning lamp illuminates, it
means you have a serious engine system problem. This
should be considered an emergency. You should stop the
vehicle as safely as possible and turn OFF the ignition. The
vehicle must be serviced and the problem corrected before
driving again. Failure to do so may cause severe engine,
DPF damage or personal injury.
NOTE: The engine shutdown sequence is engine specific;
therefore to learn how this works on your vehic le, refer to the
Engine Manufacturer's Operation and Maintenance Manual
supplied with your vehicle.
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EMISSIONS CLEANING THE DPF
Cleaning the DPF
Carefully read the following instructions to clean the DPF.
If you have any problems or difficulties contact your nearest Peterbilt authorized dealer for assistance.
The ATS needs conditions typically found in highway driving to clean the DPF. If your DPF Indicator lamp is illuminated, the easiest option is to help the ATS by proceeding
to the nearest highway.
• Select a highway that has a posted legal speed of
more than 35 mph
• Drive your vehicle until the DPF light goes off. This
may take 30 - 45 minutes of speeds greater than 20
mph (32 kph).
If your operation or planned route in the immediate future
limits your ability to reach highway speeds, proceed to the
next section titled Parked Regeneration.
Parked Regeneration
In very limited applications or operations the DPF must be
cleaned by initiating a Parked Regeneration. Follow these
six steps to initiate a Parked Regeneration:
1. Pull the vehicle over to a safe location
2. Ensure no one is in the immediate vicinity to the tail
pipe
3. Maintain a minim um of 5 f eet of clearance to an y combustible materials from the edge and top of th e vehicle
WARNING! Parking the vehicle too close to
any combustible materials or vapors may
start a fire, ignite an explosion or burn someone standing close by. Before pushing the
Regeneration switch on the dash, walk
around your vehicle and ensure you have at
least five (5) feet clearance fr om the sides and
top of your vehicle to any combustibles.
Ensure no one is in the immediate vicinity to
the tailpipe. Failure to do so could cause a
fire or lead to serious injury to you and/or
bystanders.
WARNING! Never initiate an regeneration in a
closed building or enclosure. Always park
your vehicle outside and ensure no one is in
the immediate vicinity. Failure to do so could
ignite an explosion or harm b yst ander s whic h
could result in serious injury.
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CLEANING THE DPF EMISSIONS
NOTES:Typical operation areas or materials that
can contain explosive vapors, flammable materials or people in close proximity of the vehicle are
• Fuel depots
• Grain elevators
• Dry grass, leaves or trees
• Transfer refuse stations/dumps
• Parking lots
• Load/unload terminals
NOTE: While the list above may appear comprehensive, it is your responsibility to tak e the necessary precautions and be aware of your
surroundings and ensure that no combustibles
(materials or vapors) or bystanders are close by
before initiating a regeneration.
4. Verify that the following conditions are met before proceeding. A Parked Regeneration will not initiate if any
of these conditions are not met.
• Parking brake is applied / set
• No throttle, brake or clutch applied
• PTO is disengaged
• Transmission is in neutral
5. Get out and walk all around vehicle to ensure that the
vehicle is at least 5 feet away from all combustible
materials and no one is in the immediate vicinity.
6. Climb back into the vehicle
7. Push the Regeneration (START) Switch located on
the dash for at least 4 seconds to initiate a Parked
Regeneration
NOTE: Acknowledgment that a Parked Regeneration has initiated will vary by engine. The most
predominant acknowledgement to you will be an
increase in engine RPM and overall engine
noise.
• Engine is at low idle
– 8 – Y53-6005 (09/07/06)
EMISSIONS STOP AN AUTOMATIC OR PARKED REGENERATION
NOTE: A Parked Regeneration may take 30 or
more seconds to initiate as the ATS system conducts various self-checks to verify all the system
requirements have been met.
NOTE: A Parked Regeneration will initiate only if
the DPF status light is illuminated or blinking.
If you are unable to initiate a Parked regeneration and the
DPF status light is illuminated, contact your nearest Peterbilt authorized dealer for assistance.
Stop an Automatic or Parked
Regeneration
If an Automatic or Parked Regeneration is in process and
you want the regeneration to stop , OR you w ant to pre v ent
a regeneration from occurring, your vehicle is equipped
with a switch that can STOP an Automatic or Parked
Regeneration. Since Automatic Regenerations can occur
at any time with this engine, you must depress the STOP
portion of the Regeneration Switch ANYTIME you plan to
drive your v ehi cle into a building, enclosure or area where
the activation of a regeneration is not allowed. If the
regeneration does not stop, turn the vehicle ignition OFF.
WARNING! Never allow an Automatic regeneration to automatically start whil e inside a
building such as a service bay, shop or building of any kind. Any time you are parking
your vehicle inside a building or enclosure,
ALWAYS press the Regeneration (STOP)
switch prior to entering the building. Failure
to do so could ignite an explosion which
could result in serious injury to you and/or
bystanders.
WARNING! Never initiate a Parked Regeneration in a closed building or enclosure.
Always park your vehicle outside. Failure to
do so could ignite an explosion which could
result in serious injury to you and/or
bystanders.
(09/07/06) Y53-6005 – 9 –
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