Fuel and Refueling 113
Fuel quality.........................................114
Running out of fuel....................................116
Refueling...........................................117
Fuel consumption.....................................118
Diesel Exhaust Fluid (DEF).............................120
Transmission 132
Transmission operation.................................136
Brakes 147
Brakes.............................................147
Hints on driving with anti-lock brakes......................151
Traction Control 164
TractionControl™ ....................................164
Cruise Control 166
Using cruise control...................................166
Driving Aids 168
Steering............................................170
Air suspension.......................................171
Upfitter controls......................................172
Load Carrying 173
Vehicle loading.......................................174
Towing 175
Trailertowing........................................175
Wrecker towing......................................179
Driving Hints 182
Economical driving....................................182
Table of Contents3
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USA(fus)
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 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 OR CLIMBING ON THIS VEHICLE
WARNING:Do not carry items while entering, exiting 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.
You must be careful and deliberate to minimize the possibility of personal
injury from a slip and fall when entering, exiting 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 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.
Introduction13
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Engine Starting (Parking Brake Applied)
Air BrakesVerify operation using the following procedure.
Chock the wheels, if necessary. Push in the
parking brake and, on tractors, push in the
tractor parking brake knob:
1. Verify the air compressor or governor cut-out
pressure is approximately 120 psi (827 kPa).
2. Turn off the engine, then turn the key back to
the on position (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 vehicles and 3 psi
(21 kPa) for combination vehicles.
4. Press and hold the brake pedal with 90 psi
(621 kPa) or more. Make sure there is no more
than a 3 psi (21 kPa) per minute leak for single
vehicles and a 4 psi (28 kPa) per minute leak for
combination vehicles.
5. Pump the brake pedal to deplete the system of
air pressure. The warning light and chime should
activate at 57 psi (393 kPa).
6. Pump the brake pedal and make sure the
parking brake and trailer parking brake knobs
pop out at 20 psi (138 kPa) or higher.
Automatic
Transmission
FluidVerify that the fluid level is in the proper
operating range. SeeTransmission fluid check
in theMaintenancechapter.
18Vehicle Inspection Guide
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Trailer
If you are pulling a trailer, an inspection of the trailer similar to that of
the tractor should be done. The inspection should follow trailer
manufacturer recommendations 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
WARNING: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.
If your vehicle is equipped with an automatic transmission, regularly
inspect the transmission’s neutral start switch. The engine should only
start in positionNorP.
Inspect the transmission fluid level and shift linkage for proper
operation.
Vehicle Inspection Guide25
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Telescoping Mirrors (If Equipped)
This feature allows the mirror to
extend approximately 3 inches
(75 millimeters). It is especially
useful when towing a trailer. The
mirrors can be manually pulled out
or pushed in to the desired position.
PowerScope® Power Telescoping Mirrors (If Equipped)
This feature lets you position both
mirrors at the same time. The
switch is on the door trim panel.
To telescope the mirrors out, press and hold the left side of the switch.
When the mirrors are fully extended, it is normal to hear the telescoping
motors running as long as you continue to hold the switch.
To telescope the mirrors in, press and hold the right side of the switch.
Windows and Mirrors63
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Stop Engine (diesel engine only)
This red lamp illuminates when the engine needs to be stopped
(as soon as it can be safely done). If the lamp begins flashing,
automatic engine shutdown may take place in as little as
20 seconds.
WARNING:In the event of engine shutdown, make sure the
vehicle is safely off the road and the problem is remedied prior to
returning to the road. Failure to remove the vehicle from the road
could result in an accident, causing serious injury or death.
If the engine shuts down, it can be restarted and operated for
30 seconds at a time, or until the problem is corrected. For more
information, seeEngine automatic shutdown warning light or chime
in theDrivingchapter, and your engine operator’s manual.
See your engine operator’s manual for specific information regarding this
feature. Drivers of electronically-controlled engines should know the
extent of the warning engine shutdown system before operating the
vehicle.
Traction Control (diesel engine only)
It illuminates and flashes slowly if the Off Road or Mud/Snow
mode is selected. It illuminates and flashes rapidly during a
traction control event.
Trailer Anti-Lock Braking System (ABS)
It illuminates briefly when the ignition is switched on and only
when a PLC trailer or a PLC diagnostic tool is connected. If the
light fails to illuminate, remains on after the vehicle is started
or continues to flash, have the system serviced immediately.
Wait to Start (diesel engine only)
It illuminates when the air intake heater is in operation and
special starting procedures are required.
WARNING:If equipped with an air intake heater, DO NOT use
ether or any other starting fluids. The use of starting fluids
(ether) in an engine equipped with an air intake heater could result in
damage and/or personal injury.
72Instrument Cluster
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Anti-lock Brake System (ABS)
This system helps you maintain steering control during emergency stops
by keeping the brakes from locking.
The ABS lamp momentarily illuminates when the ignition is
turned on. If the light does not illuminate during start-up,
remains on or flashes, the ABS may be disabled and may need
to be serviced.
If the ABS is disabled, normal braking is still effective. If the
brake warning lamp illuminates, have your brake system
serviced immediately.
If a PLC trailer is connected when the ignition is switched on,
the trailer ABS light also illuminates. If the light fails to
illuminate, remains on after the vehicle is started or continues
to flash, have the system serviced immediately.
FULL POWER BRAKE SYSTEM
WARNING:If the red BRAKE warning lamp in the instrument
cluster remains illuminated after engine start up, this indicates a
system failure in the Full Power Brake System. Stop the vehicle safely
as soon as possible and seek service immediately.
This system incorporates standard braking, an anti-lock braking system
(ABS) and optional Power Park Brake into one fully-integrated hydraulic
brake system. With the Full Power Brake System, braking energy is
stored, similar to an air brake system, resulting in faster response times
and shorter stopping distances. This is accomplished using motor and
pump assemblies that pressurize the system by pumping brake fluid into
accumulators. This is similar to the air compressor of an air brake system
pressurizing the air tanks. The system includes a master cylinder that
provides the normal pedal feel and transfers the pedal force, via brake
fluid, to the main components of the system.
Note:The motor and pumps run momentarily with the ignition switch in
the on or run position, or in the off position with the brake pedal
pressed.
Note:During normal driving, the pump and motors may be heard
replenishing the accumulators. This is a normal function of the system.
148Brakes
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Exhaust Brake Operating Characteristics
When you remove your feet from both the accelerator and clutch pedals
and the exhaust brake switch is in the on position, the exhaust brake is
activated. The following conditions exist if the brake is operating properly:
•A slight change in engine sound when the exhaust brake is activated.
•A smooth braking effect. Do not expect a retarding effect similar to
sudden, hard application of the service brakes.
•The retarding force possibly felt acting against your body when the
brake is applied (depending on the grade and vehicle load). This force
is actually preventing the vehicle from going much faster.
•Engine temperature remaining in the normal operating range.
•The tachometer showing a drop in engine RPM (depending on grade
and vehicle load) during a descent.
•A decrease in road speed when the exhaust brake is applied during a
descent, except when the vehicle is carrying a heavy load or the grade
is extremely steep. In these instances, you may need to apply the
service brakes occasionally.
TRAILER BRAKES
Trailer Brake Hand Control (If Equipped)
WARNING: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 is located on the
right-hand side of the instrument
panel. It is used to apply the
trailer service brakes which are
independent of the truck or tractor
service brakes.
It 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.
To apply the trailer brakes using the hand control, move the lever
downward. The further the lever is pushed down, the greater the air
pressure is applied to the brakes. The lever remains in place until
manually moved.
To release the trailer brakes, move the lever up completely.
Brakes153
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