Paccar 12-Speed User manual

Operator’s Manual
Operators Manual’12 Speed

Safety..................................... 1
Driving..................................... 2
Maintenance..................................... 3
Information..................................... 4
Contents

© 2017 PACCAR Inc. - All Rights Reserved
This manual illustrates and describes the operation of features or equipment which may be either
standard or optional on this vehicle. This manual may also include a description of features and
equipment which are no longer available or were not ordered on this vehicle. Please disregard any
illustrations or descriptions relating to features or equipment which are not on this vehicle. PACCAR
reserves the right to discontinue, change specifications, or change the design of its vehicles at any
time without notice and without incurring any obligation. The information contained in this manual is
proprietary to PACCAR. Reproduction, in whole or in part, by any means is strictly prohibited without
prior written authorization from PACCAR Inc.
Contents

Chapter 1 | SAFETY
In this Chapter:
Using this Manual..................................................................................................................................5
Safety Alerts..........................................................................................................................................5
Illustrations............................................................................................................................................6
General Safety Instructions...................................................................................................................7
Warnings and Cautions.........................................................................................................................9
A Special Word About Repairs..............................................................................................................9
SAFETY -
4 Y53-1272-1B1 (08/17)
1

Using this Manual
Please take the time to get acquainted with
your vehicle by reading this Operator’s
Manual. We recommend that you read and
understand this manual from beginning to
end before you operate this equipment.
This manual contains useful information for
the safe and efficient operation of this
equipment. It also provides service
information, with an outline for performing
safety checks and basic preventive
maintenance inspections. We have tried to
present the information you’ll need to learn
about functions, controls, and operation—
and to present it as clearly as possible. We
hope you’ll find this manual easy to use.
There will be times when you need to take
this manual out of the glovebox. When you
do, please be sure to return it when you
are finished using it. That way it will be
there when you need it the next time or
when you pass the vehicle on to the next
user.
NOTE
After you’ve read this manual, it should
be stored in the cab for convenient ref-
erence and remain with this truck
when sold.
Your vehicle may not have all the features
or options mentioned in this manual.
Therefore, you should pay careful attention
to the instructions that pertain to just your
vehicle. In addition, if your vehicle is
equipped with special equipment or options
not discussed in this manual, consult your
dealer or the manufacturer of the
equipment.
There are several tools built into this
manual to help you find what you need
quickly and easily. First is the Quick Table
of Contents. Located at the front of the
manual, this lists the main subjects
covered and gives section numbers where
you can find these subjects. Use the Quick
Table of Contents to find information on a
large subject like “Maintenance.” Cross-
referenced citations also help you get the
information you need. If some other part of
the manual contains further information on
the subject you are reading about, we’ll
indicate that in a cross-reference like this:
(See Safety Alerts on page 5). You won’t
have to go searching for more information.
Finally you’ll find a helpful Subject Index.
It’s in the back of the manual and
alphabetically lists the subjects covered.
So if you want information on brakes, for
example, just look under Brake in the
Subject Index. You’ll find all the pages
listed where brakes or braking are
discussed.
All information contained in this manual is
based on the latest production information
available at the time of publication.
Kenworth Truck Company Peterbilt Motors
Company reserves the right to make
changes at any time without notice.
Safety Alerts
Please read and follow all of the safety
alerts contained in this manual. They are
there for your protection and information.
These alerts can help you avoid injury to
yourself, your passengers and help prevent
costly damage to the vehicle. Safety alerts
are highlighted by safety alert symbols and
signal words such as “WARNING”,
SAFETY - Using this Manual
Y53-1272-1B1 (08/17) 5
1

“CAUTION”, or “NOTE”. Please DO NOT
ignore any of these alerts.
Warnings
The safety message following this symbol
and signal word provides a warning against
operating procedures which could cause
death or injury. They could also cause
equipment or property damage. The alert
will identify the hazard, how to avoid it and
the probable consequence of not avoiding
the hazard.
WARNING
Hot engine oil can be dangerous. You
could be burned. Let the engine oil
cool down before changing it. Failure
to comply may result in death, person-
al injury, equipment or property dam-
age.
Cautions
The safety message following this symbol
and signal word provides a caution against
operating procedures which could cause
equipment or property damage. The alert
will identify the hazard, how to avoid it, and
the probable consequence of not avoiding
the hazard.
CAUTION
Continuing to operate your vehicle with
insufficient oil pressure will cause seri-
ous engine damage. Failure to comply
may result in equipment or property
damage.
Notes
The message following this symbol and
signal word provides important information
that is not safety related but should be
followed. The alert will highlight things that
may not be obvious and is useful to your
efficient operation of the vehicle.
NOTE
Pumping the accelerator will not assist
in starting the engine.
Illustrations
Some of the illustrations throughout this
manual are generic and will NOT look
exactly like the engine or parts used in
your application. The illustrations can
contain symbols to indicate an action
required and\or an acceptable or NOT
acceptable condition.
The illustrations are intended to show
repair or replacement procedures. The
procedure will be the same for all
applications, although the illustration may
differ.
SAFETY - Illustrations
6 Y53-1272-1B1 (08/17)
1

General Safety
Instructions
Important safety notices about operating
and servicing your engine.
WARNING
Improper practices, carelessness, or
ignoring any warnings may cause
death, personal injury, equipment or
property damage.
Before performing any repair, read and
understand all of the safety precautions
and warnings. The following is a list of
general safety precautions that must be
followed to provide personal safety. Failure
to follow these instructions may cause
death or injury. Special safety precautions
are included in the procedures when they
apply.
Keep in mind that even a well maintained
vehicle must be operated within the range
of its mechanical capabilities and the limits
of its load ratings. See the Weight Ratings
label on the driver's door edge.
Every new vehicle is designed to conform
to all Federal Motor Vehicle Safety
Standards applicable at the time of
manufacture. Even with these safety
features, continued safe and reliable
operation depends greatly upon regular
vehicle maintenance. Follow the
maintenance recommendations found in
Preventive Maintenance section. This will
help preserve your investment.
Make sure your vehicle is in top working
condition before heading out on the road, it
is the responsible driver's duty to do so.
Inspect the vehicle according to the
Driver's Check List.
• Use the proper tool for manually
rotating the engine. DO NOT
attempt to rotate the crankshaft by
pulling or prying on the fan. This
practice can cause death, personal
injury, equipment damage, or
damage to the fan blades, causing
premature fan failure.
• Work areas should be dry, well lit,
well ventilated, free from clutter,
loose tools, parts, ignition sources
and hazardous substances.
• Wear protective glasses and
protective shoes when working.
• DO NOT wear loose-fitting or torn
clothing. Tie back and/or tuck in
long hair. Remove all jewelry when
working.
• Before beginning any repair,
disconnect the battery (negative [-]
cable) and discharge any
capacitors.
• Put a “DO NOT OPERATE” tag in
the operator's compartment or on
the controls.
• Allow the engine to cool before
slowly loosening the coolant filler
cap to relieve the pressure from the
cooling system.
WARNING
Removing the fill cap on a hot engine
can cause scalding coolant to spray
out and burn you badly. If the engine
has been in operation within the previ-
ous 30 minutes, be very careful in re-
moving the fill cap. Protect face,
hands, and arms against escaping flu-
id and steam by covering the cap with
a large, thick rag. DO NOT try to re-
move it until the surge tank cools down
or if you see any steam or coolant es-
caping. In any situation, remove the
cap very slowly and carefully. Be ready
to back off if any steam or coolant be-
gins to escape.
SAFETY - General Safety Instructions
Y53-1272-1B1 (08/17) 7
1

• Always use wheel chocks or proper
jack stands to support the vehicle
or vehicle components before
performing any service work. DO
NOT work on anything that is
supported only by lifting jacks or a
hoist. Before resting a vehicle on
jack stands, be sure the stands are
rated for the load you will be
placing on them.
• Before removing or disconnecting
any lines, fittings, or related items,
relieve all pressure in the air, oil,
fuel, and cooling systems. Remain
alert for possible pressure when
disconnecting any device from a
system that contains pressure.
High pressure oil or fuel can cause
death or personal injury.
• Always wear protective clothing
when working on any refrigerant
lines and make sure that the
workplace is well ventilated.
Inhalation of fumes can cause
death or personal injury. To protect
the environment, liquid refrigerant
systems must be properly emptied
and filled using equipment that
prevents the release of refrigerant
gas. Federal law requires capturing
and recycling refrigerant.
• When moving or lifting any heavy
equipment or parts, make sure to
use proper techniques and
assistance. Ensure all lifting
devices such as chains, hooks, or
slings are in good condition and
are of the correct load capacity.
Make sure all lifting devices are
positioned correctly.
• Corrosion inhibitors and lubricating
oils may contain alkali. DO NOT
get the substance in eyes and
avoid prolonged or repeated
contact with skin. DO NOT
swallow. If ingested, seek
immediate medical attention. DO
NOT induce vomiting. In case of
contact, immediately wash skin
with soap and water. In case of
harmful contact, immediately
contact a physician. Always keep
any chemicals OUT OF REACH
OF CHILDREN.
• Naptha and Methyl Ethyl Ketone
(MEK) are flammable materials and
must be used with caution. Follow
the manufacturer's instructions to
ensure safety when using these
materials. Always keep any
chemicals OUT OF REACH OF
CHILDREN.
• When working on the vehicle, be
alert for hot parts on systems that
have just been turned off, exhaust
gas flow, and hot fluids in lines,
tubes, and compartments. Contact
with any hot surface may cause
burns.
• Always use tools that are in good
condition. Make sure you have the
proper understanding of how to use
the tools before performing any
service work. Use only genuine
replacement parts from PACCAR.
• Always use the same fastener part
number (or equivalent) when
replacing items. DO NOT use a
fastener of lesser quality if
replacements are necessary. (e.g.,
Do not replace a 10.9 grade with
8.8 grade fastener.)
• Always torque fasteners and fuel
connections to the required
specifications. Overtightening or
under-tightening can allow leakage.
• Close the manual fuel valves prior
to performing maintenance and
repairs, and when storing the
vehicle inside.
• DO NOT perform any repair when
impaired, tired, fatigued or after
SAFETY - General Safety Instructions
8 Y53-1272-1B1 (08/17)
1

consuming alcohol or drugs that
can impair your functioning.
• Some state and federal agencies in
the United States of America have
determined that used engine oil
can be carcinogenic and can cause
reproductive toxicity. Avoid
inhalation of vapors, ingestion, and
prolonged contact with used engine
oil.
• DO NOT connect the jump starting
or battery charging cables to any
ignition or governor control wiring.
This can cause electrical damage
to the ignition or governor.
• Coolant is toxic. If not reused,
dispose of coolant in accordance
with local environmental
regulations.
CAUTION
Corrosive chemicals can damage the
engine. DO NOT use corrosive chemi-
cals on the engine. Failure to comply
may result in equipment, or property
damage.
California Proposition 65 Warning
• Diesel engine exhaust and some of
its constituents are known to the
State of California to cause cancer,
birth defects, and other
reproductive harm.
• The catalyst substrate located in
the Diesel Particulate Filter (DPF)
contains vanadium pentoxide,
which has been determined by the
State of California to cause cancer.
Always wear protective clothing
and eye protection when handling
the catalyst assembly. Dispose of
the catalyst in accordance with
local regulations. If catalyst
material gets into the eyes,
immediately flood eyes with water
for a minimum of 15 minutes. Avoid
prolonged contact with skin. In
case of contact, immediately wash
skin with soap and water. In case
of harmful contact, immediately
contact a physician.
• Other chemicals in this vehicle are
also known to the State of
California to cause cancer, birth
defects or other reproductive harm.
• Battery posts, terminals, and
related accessories contain lead
and lead compounds, chemicals
known to the State of California to
cause cancer and reproductive
harm. Wash hands after handling.
Warnings and Cautions
A Special Word About
Repairs
WARNING
Do not attempt repair work without suf-
ficient training, service manuals, and
the proper tools. You could be killed or
injured, or you could make your vehi-
cle unsafe. Do only those tasks you
are fully qualified to do.
SAFETY - Warnings and Cautions
Y53-1272-1B1 (08/17) 9
1

WARNING
Modifying your vehicle can make it un-
safe. Some modifications can affect
your vehicle's electrical system, stabili-
ty, or other important functions. Before
modifying your vehicle, check with
your dealer to make sure it can be
done safely. Improper modifications
can cause death or personal injury.
CAUTION
The installation of electronic devices to
the On Board Diagnostics (OBD) con-
nector, the vehicle Controller Area Net-
work (CAN), or their associated wiring
is not permitted. Doing so can ad-
versely affect vehicle performance
and/or cause fault codes to be record-
ed. The OBD connector is provided for
temporary connection of service tools
and for diagnostic purposes only.
Your dealer’s service center is the best
place to have your vehicle repaired. You
can find dealers all over the country with
the equipment and trained personnel to get
you back on the road quickly—and keep
you there.
Your vehicle is a complex machine.
Anyone attempting repairs on it needs
good mechanical training and the proper
tools. If you are sure you have these
requirements, then you can probably
perform some repairs yourself. However,
all warranty repairs must be performed by
an authorized service facility. If you aren’t
an experienced mechanic, or don’t have
the right equipment, please leave all
repairs to an authorized service facility.
They are the ones equipped to do the job
safely and correctly.
Maintenance Manuals
If you do decide to do any complex repair
work, you’ll need the maintenance
manuals. Order them from your authorized
dealer. Please provide your Chassis Serial
Number when you order, to be sure you
get the correct manuals for your vehicle.
Allow about four weeks for delivery. There
will be a charge for these manuals.
Final Chassis Bill of Material
A complete, non-illustrated computer
printout listing of the parts used to custom-
build your vehicle is available through the
dealer from whom you purchased your
vehicle.
SAFETY - A Special Word About Repairs
10 Y53-1272-1B1 (08/17)
1

SAFETY - A Special Word About Repairs
Y53-1272-1B1 (08/17) 11
1

Chapter 2 | DRIVING
In this Chapter:
Controls on the Right Hand of the Steering Column...........................................................................13
Drive Neutral Reverse Selector...........................................................................................................13
Up or Down Shifting............................................................................................................................ 15
Engine Brake Operation for a Vehicle with Automated Transmission.................................................17
Using the Manual - Automatic Button..................................................................................................18
Start-Up and Power Down.................................................................................................................. 19
Transmission Power Take Off (PTO)...................................................................................................20
Snow/Ice Operation.............................................................................................................................21
Trailer Operation................................................................................................................................. 21
Features..............................................................................................................................................21
DRIVING -
12 Y53-1272-1B1 (08/17)
2

Controls on the Right
Hand of the Steering
Column
This vehicle may be equiped with the
PACCAR Transmission. The lever on the
right hand side of the steering column will
operate the transmission functions in
addition to operating the engine brake.
1Transmission D - N - R Function
2Up (+) and Down (-) Shift and Low Mode
3Engine Brake and Max Mode
4Manual (M) / Automatic (A) Mode Button
Related concepts
Related tasks
Drive Neutral Reverse
Selector
Transmission mode is selected by rotating
the lever's outer knob. There is a detent for
Drive, Neutral, Reverse.
The instrument cluster will display the
corresponding mode.
For Kenworth Vehicles
For Peterbilt Vehicles
DRIVING - Controls on the Right Hand of the Steering Column
Y53-1272-1B1 (08/17) 13
2

NOTE
Selector (the transmission) must be in
N (Neutral) to start the truck.
Neutral Mode
• Selects Neutral.
• Initial Gear position after Start-Up.
WARNING
Apply parking brake and follow vehicle
manufacturer parking instructions. Fail-
ure to follow these instructions could
cause unintended vehicle movement re-
sulting in death, serious injury or dam-
age to property.
NOTE
When attempting to start the engine and
the engine does not crank, confirm Neu-
tral is selected, vehicle parking brake is
applied and service brake is depressed.
Reverse Mode
• Reverse mode selects the default
Reverse gear.
NOTE
If the driver attempts to select a non-
neutral mode without depressing the
service brakes the transmission will not
shift into gear and you will have to return
to Neutral and depress the service
brakes before selecting the desired
mode again.
• Each time Reverse is selected from
Neutral, the default Reverse gear is
engaged.
Drive Mode (Auto Mode)
• Intelligent Start Gear Selection will
automatically select the start gear
depending on inputs such as, load,
grade, and axle/transmission ratio.
This start gear can be changed by
using the up/downshift request
procedure, as long as the selection
still falls into a gear that would
allow the vehicle to launch without
causing damage to the
transmission.
NOTE
If the driver attempts to select a non-
neutral mode without depressing the
service brakes the transmission will not
shift into gear. The driver must re-select
Neutral and depress the service brakes
before selecting the desired mode
again.
• If the start gear is changed using
the up/downshift request
procedure, it will remain as the
default until the vehicle is powered
down or the selection is changed.
However, conditions such as,
grade, may still override the default
start gear selection.
• A shift can be advanced by using
the up/downshift request procedure
when the transmission is near the
shift point.
DRIVING - Drive Neutral Reverse Selector
14 Y53-1272-1B1 (08/17)
2

NOTE
Multiple gear upshifts and downshifts
may be allowed when the up/downshift
request procedure is performed multiple
times (Each request equals one gear
change request).
• The transmission may also deny a
shift while ascending or
descending grades if the load of
the vehicle and grade of the terrain
in combination with the drivetrain
ratio and engine torque will fall
outside of the acceptable range to
perform a shift. If the shift is denied
it will sound a tone.
Up or Down Shifting
When in the Manual mode, the
transmission gears can be manually
selected by pushing or pulling on the lever.
Pushing the lever forward will down shift.
Pushing and holding the lever forward will
engage the LOW gear range. Pulling the
lever towards the driver will upshift the
transmission.
Some vehicles may have a feature that
prompts the operator to shift for optimal
fuel economy.
For Kenworth Vehicle with Shift Assist
For Peterbilt Vehicles with Shift Assist
If the prompt appears in the instrument
cluster, use the manual gear selector lever
to change gears.
DRIVING - Up or Down Shifting
Y53-1272-1B1 (08/17) 15
2

The instument cluster will illuminate with
the corresponding gear.
Gear Display
LOW Mode
LOW mode should be used any time you
want to maximize engine braking and
minimize the use of the brake pedal. For
example, when driving down long grades
or when coming to a stop.
• Selects lowest available gear for
start gear. The starting gear cannot
be changed in LOW mode.
NOTE
If the driver attempts to select a non-
neutral mode without depressing the
service brakes the transmission will not
shift into gear. The driver must re-select
Neutral and depress the service brakes
before selecting the desired mode
again.
• If LOW is selected while moving,
the transmission will not upshift
(except for the Transmission
Override conditions noted on the
previous page). The transmission
system will downshift at the earliest
opportunity to enable higher than
normal engine RPM to provide
maximum engine braking.
WARNING
On slippery surfaces minimize engine
braking in LOW mode. Excessive en-
gine braking at higher engine RPM
could cause a loss of traction and vehi-
cle control.
NOTE
The PACCAR Automated Transmission
initiates upshifts from MANUAL and
LOW for engine overspeed protection.
How to Deactivate MAX Mode
Vehicles with automated transmissions will
have the engine brake function integrated
with the transmission controls. Follow
these steps to deactivate MAX engine
brake mode.
1. Accelerate with the throttle pedal.
2. Upshift, see Up or Down Shifting
on page 15.
3. Wait for the transmission coast
down gear to engage.
DRIVING - Up or Down Shifting
16 Y53-1272-1B1 (08/17)
2

4. Reduce engine brake level, see
Engine Brake Operation for a
Vehicle with Automated
Transmission on page 17.
5. Re-initiate MAX mode, see Engine
Brake Operation for a Vehicle with
Automated Transmission on page
17.
6. Select Neutral N, see Drive Neutral
Reverse Selector on page 13.
7. Select LOW mode, see Engine
Brake Operation for a Vehicle with
Automated Transmission on page
17.
Engine Brake Operation
for a Vehicle with
Automated Transmission
Moving the lever clockwise will engage the
engine brake. Increase the amount of
engine brake by moving the lever further
clockwise. Each position has a
corresponding level of engine brake.
Position Amount of Engine Brake
Off 0 %
1 33%
2 66%
3 100%
Position Amount of Engine Brake
4* 100% AND will engage
transmission low gear
* This position is momentary
and will revert back to position
3 when the lever is released.
The corresponding engine brake level (or
MAX mode) will be illuminated in the
instrument cluster.
DRIVING - Engine Brake Operation for a Vehicle with Automated Transmission
Y53-1272-1B1 (08/17) 17
2

Related tasks
Using the Manual -
Automatic Button
This button will put the transmission into
manual mode. Manual mode will allow the
operator to select the gear. See Up or
Down Shifting on page 15.
To activate, put the gear selector in the D
(drive) mode and then depress the M/A
button. The instrument cluster will display
the corresponding selection.
For Peterbilt Vehicles
For Kenworth Vehicles
MANUAL Mode
MANUAL mode should be used whenever
the driver wants to select the shifts instead
of letting the transmission select them
automatically.
• Driver manually selects the start
gear and uses the up/downshift
request to shift.
NOTE
Multiple gear upshifts and downshifts
may be allowed when the up/downshift
request procedure is performed multi-
ple times (Each request equals one
gear change request).
• If the driver attempts to select a
non-neutral mode without
depressing the service brakes the
transmission will not shift into gear.
The driver must re-select Neutral
and depress the service brakes
before selecting the desired mode
again.
• System holds current gear unless
otherwise prompted by using up/
downshift request, except for the
“Transmission Manual Override”
conditions noted below.
DRIVING - Using the Manual - Automatic Button
18 Y53-1272-1B1 (08/17)
2