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FEDERAL HIGHWAY ADMINISTRATION REGULATION
Regulations such as those issued by the Federal Highway Administration
or issued pursuant to the Occupational Safety and Health Act (OSHA),
and/or state and local laws and regulations may require additional
equipment for the way you intend to use the vehicle. It is the
responsibility of the registered owner to determine the applicability of
such laws and regulations to your intended use for the vehicle, and to
arrange for the installation of required equipment. Your dealer has
information about the availability of equipment which may be ordered for
your vehicle.
ENTERING, EXITING AND/OR CLIMBING ON THIS VEHICLE
You must be careful and deliberate to minimize the possibility of personal
injury from a slip and fall when entering, exiting and/or climbing on this
vehicle. Always use the steps and assist handles before climbing. Do not
skip any steps or assist handles. Use three point contact at all times with
at least two feet and one hand or two hands and one foot firmly placed
during all phases of entering, exiting and/or climbing. Always keep your
shoe soles and hands clean. Keep the steps and assist handles free of
snow, ice, oil, grease, substances or debris. Be sure to use extra care in
bad weather. Avoid wearing thick gloves. Always perform trailer hook-up
while standing on the ground.
Do not carry items while entering, exiting, and/or climbing. Make
sure you keep a firm grip. Always FACE the VEHICLE STEP and
HANDLE SYSTEM while climbing up and down. Do not climb behind
the cab unless you have three point contact with a step and handle
system at all times.
Introduction
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Engine starting (parking brake applied)
Air brake check:Check the air brakes in the following manner
(Chock the wheels, if necessary. Push in the
parking brake and on tractors, also push in the
tractor parking brake knob):
1. Check the air compressor or governor cut-out
pressure (approximately 120 psi [827 kPa]).
2. Cut-off the engine and turn the key back to
ON, without starting the engine.
3. Without the brake pedal applied, note the
air pressure drop for one minute. It should be
less than 2 psi (14 kPa) for single vehicle and
3 psi (21 kPa) for combination vehicles.
4. Depress and hold the brake pedal with 90
psi (621 kPa) or more and make sure there is
no more than a 3 psi (21 kPa) per minute
leak. For combination vehicles, no more than 4
psi (28 kPa) per minute.
5. Pump the brake pedal to deplete the system
air pressure. The warning light and chime
should activate 57 psi (393 kPa).
6. Pump the brake pedal and make sure the
parking brake and trailer parking brake knobs
knobs pop out at 20 psi (138 kPa) or higher.
Parking brake:Check that the parking brake will hold the
vehicle by gently trying to pull forward with
the parking brake applied.
Automatic
transmission fluid:With the engine idling (at normal operating
temperature) and the parking brake applied,
check the automatic transmission fluid. If fluid
needs to be added, place the transmission in
the appropriate gear as specified in the
transmission operator’s manual and refer to
Transmission fluidin theMaintenance and
specificationschapter.
Vehicle inspection guide
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Rear wheels
Spacers:Make sure dual wheels are evenly separated
and that tires are not touching one another.
Rims:Check for damaged or bent rims. Rims should
not have welding repairs and no rust trails that
indicate it is loose on the wheel.
Lug nuts:Make sure all lug nuts are present and not
loose (look for rust trails around the lug nuts).
There should be no cracks radiating from the
lug bolt holes or distortion of the bolt holes.
TRAILER
If you are pulling a trailer, an inspection of the trailer similar to that of
the tractor should be done. Such an inspection should follow trailer
manufacturer recommendation and should include at a minimum: general
condition, landing gear, doors, sides, lights, reflectors, suspension,
brakes, tires, wheels, cargo placement, stability and tie-downs.
TRANSMISSION
If your vehicle is equipped with an automatic transmission, regularly
check the transmission’s neutral start switch. The engine should only
start in the N (Neutral) or P (Park) positions.
If the unit starts in gear and/or the neutral start switch is not
functioning correctly, the vehicle may inadvertently move which
could result in property damage, personal injury or death.
Check the transmission fluid level and shift linkage for proper operation.
Vehicle inspection guide
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Trailer ABS brake system (if
equipped):Illuminates briefly when
the engine is powered-up and only
when a PLC trailer or a PLC
diagnostic tool is connected. If the
light remains on after the vehicle is started, continues to flash or fails to
illuminate, have the system serviced immediately.
Parking brake warning:
Momentarily illuminates when the
ignition is turned to the ON position
and the engine is off. Also
illuminates when the parking brake
is engaged. If the brake warning
lamp does not illuminate at these
times, seek service immediately.
Vehicles equipped with the Power Park (air-operated parking
brake) option:If after setting the parking brake on your vehicle the
park brake warning lamp begins to blink, this may indicate a failure in
the parking brake system. Seek service from your dealer immeadiately.
Safety belt:Reminds you to fasten
your safety belt. A chime will also
sound to remind you to fasten your
safety belt.
Check trans (Allison automatic
transmission):The lamp will
illuminate for several seconds after
the ignition is turned to the ON
position. Illumination of this light indicates that a problem has been
detected and shifting may be restricted. Depending upon the severity of
the problem, the read-out digit on the shifter display may be blank.
Operation may continue in order to reach service assistance. The ECU
may not respond to shift selector requests, since operating limitations
are being placed on the transmission, i.e. upshifts and downshifts may be
restricted. Direction changes will not occur.
Refer to the Transmission Operator’s Manual for more information.
P
BRAKE
CHECK
TRANS
Instrumentation
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Fold-away mirrors
The mirrors can be manually folded forward or backwards for narrow
spaces like driving through an automatic car wash or backing out of a
garage with the trailer tow mirror.
The telescoping feature (if equipped) allows the mirror to extend
approximately three inches (76 mm). This feature is especially useful to
the driver when towing a trailer.
SPEED CONTROL (IF EQUIPPED)
To turn speed control on
Instrument panel-mounted
controls:Press CRUISE RPM. If the
vehicle is moving, speed control will
be enabled; if the vehicle is
stationary, engine RPM can be
controlled.
Steering wheel-mounted
controls:Press ON. Vehicle speed
cannot be controlled until the
vehicle is traveling at or above 30
mph (48 km/h).
Do not use the speed control in heavy traffic or on roads that
are winding, slippery, or unpaved.
CRUISE
RPM
OFF
Driver controls
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•Depending on the grade and vehicle load, you may or may not feel the
retarding force acting against your body when the brake is applied.
The brake’s retarding force is actually preventing the vehicle from
going much faster.
•Engine speed has a major effect on retarding performance, with higher
engine speeds permitting greater retarding ability.
•Engine brake performance is closely related to the type of
transmission your vehicle is equipped with. Downshifting of manual
transmission to the lowest gear possible, without exceeding the
maximum engine RPM limit, will maximize retarding performance.
Exhaust brakes will operate effectively with automatic transmissions,
but performance will vary with engine speed and the gear selected by
the transmission.
Make sure the exhaust brake is turned off before shutting off the engine.
Note:Installing an exhaust or auxiliary brake does not necessarily
protect the engine from exceeding maximum governed speed. The
primary brakes should be used to never allow the engine to exceed
maximum governed speed under any conditions.
Trailer brake hand control (if equipped)
The hand control, located on the
right-hand side of the instrument
panel, is used to apply the trailer
service brakes which are
independent of the truck or tractor
service brakes.
The hand control should
never be used to apply the
brakes when the tractor and
trailer are parked unattended. Air
may leak from the system and the
vehicle could possibly move,
resulting in possible property
damage, personal injury or death.
The hand control operates a valve that provides gradual control of air
pressure applied; when the valve is only partially applied, the trailer
brakes can be overridden by pressing fully on the brake pedal.
Driving
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To apply the trailer brakes using the hand control, move the lever
downward. The further the lever is pushed downward, the greater the air
pressure is applied to the brakes. The lever will remain in place until
manually moved.
To release the trailer brakes, move the lever upward completely.
Trailer air supply and parking brake modular controls (if equipped)
The trailer air supply valve delivers air to the trailer supply and will
automatically pop out, shutting off the trailer supply if pressure is
decreased to approximately 35 psi (249 kPa).
The parking brake controls the spring brakes on the tractor. When the
knob is pulled out it causes the trailer supply valve to pop out, applying
both the tractor and trailer parking brakes. The trailer brakes may be
independently released by pushing only the trailer air supply valve in.
TRAILER
AIR SUPPLY
NOT FOR PARKING
TO
TOP
U
L
L
SUPPLY
EVACUATE
PUSH
Driving
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Initial charge
With the air system completely discharged, both knobs (1 and 2) will be
out. When the air pressure reaches 70 psi (483 kPa) the trailer air
supply (1–red knob) may be pushed in and should stay in charging the
trailer air system and releasing the trailer brakes.
The parking brake (2–yellow knob) can now be pushed in and supply air
to the tractor spring brakes, releasing them.
12 12
12
Driving
110