WARNING:Exercise great caution when working on vehicle
equipped with an automatic fan clutch. The fan starts in motion
only after the engine coolant reaches a predetermined temperature or
the refrigerant pressure (if equipped with air conditioning) reaches a
predetermined setting. The fan starts at this point with no advance
warning. Never reach near, or permit objects to protrude into, the fan
blade radius while the engine is running as this could result in vehicle
damage, personal injury or death.
Engine starting (parking brake applied)
Safety/Emergency
equipmentBefore entering the cab, verify that the vehicle is
equipped with spare electrical fuses (if used),
three red reflective triangles, a properly charged
and rated fire extinguisher and wheel chocks.
Walk around the vehicle and verify all steps and
grab handles, inside and out as well as behind,
are tight and clean. Use extreme caution and a
three-point stance at all times. Inspect door
latches for positive closing, latching and locking.
Starting the
engineSet the parking brake, press the clutch (if
equipped with a manual transmission) and verify
the transmission is in neutral. Vehicles equipped
with an automatic transmission should be in N
(Neutral) or P (Park) (if equipped with a park
position).
Diesel engine:Turn the key to the on position;
when the
light in the instrument cluster
turns off, turn the key to start.
Gas engine:Turn the key to start, then release
it as soon as the engine starts.
Oil pressureVerify engine oil pressure builds to normal
operating range.
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Engine starting (parking brake applied)
Air brakesVerify air brake operation 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. 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 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 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 fluidInspect the automatic transmission fluid with the
engine idling at normal operating temperature
and the parking brake applied. If fluid needs to
be added, refer toTransmission fluidin the
Maintenance and Specificationschapter.
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Rear wheels
SpacersVerify dual wheels are evenly separated and that
tires are not touching one another.
RimsInspect for damaged or bent rims. Rims should
not have welding repairs and no rust trails that
indicate it is loose on the wheel.
Lug nutsVerify 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. 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
If your vehicle is equipped with an automatic transmission, regularly
inspect the transmission’s neutral start switch. The engine should only
start in the N (Neutral) or P (Park) positions.
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.
Inspect the transmission fluid level and shift linkage for proper
operation.
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Charging system:Illuminates when
the battery is not charging properly.
If it stays on while the engine is
running, there may be a malfunction
with the charging system or a related component. Contact your
authorized dealer as soon as possible.
Check fuel cap (gasoline engine
only):Illuminates when the fuel cap
may not be properly installed.
Continued driving with this light on
may cause the service engine soon
warning indicator to illuminate.
Check suspension (if equipped):
Illuminates when the air suspension
dump switch has been activated.
Check trans (Allison automatic
transmission only):Illuminates
while driving if 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.
On MD 3000 series transmissions,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 do not occur.
Refer to your transmission operator’s manual for more information.
Diesel exhaust fluid (diesel
engine only):Illuminates when the
diesel exhaust fluid level falls below
0.5 gallon (1.9L) in the 5 gallon
(19.0L) tank or 1 gallon (3.8L) in
the 9 gallon (34.0L) tank. Refill the
tank or, at a minimum, add at least
1 gallon (3.8L) to the 5 gallon
(19.0L) tank or 2 gallons (7.6L) to the 9 gallon (34.0L) tank.
Instrument Cluster
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Diesel particulate filter (diesel
engine only):Illuminates when the
soot level in the DPF has reached a
point where it requires operator
assistance. Refer toDiesel
particulate filterin the
Maintenance and Specifications
chapter and your engine operator’s
manual, for more details.
Do not shift (Allison automatic
transmission only):Illuminates
while driving if 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 do not occur.
Refer to your transmission operator’s manual for more information.
Electronic locking differential
(if equipped):Displays when using
the electronic locking differential.
Engine oil pressure (gasoline
engine only):Illuminates when
engine oil pressure is low.
High beams:Illuminates when the
high-beam headlamps are turned on.
Instrument Cluster
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Recirculated air engages automatically when MAX A/C is selected or can
be engaged manually in any airflow mode except
(defrost). When
the ignition switch is turned off and back on, the climate system returns
to the recirculated air mode only if the A/C button LED is illuminated
and the air distribution selection is either
(panel) or
(panel/floor).
6.MAX A/C (if equipped):Distributes recirculated air through the
instrument panel vents to cool the vehicle. This re-cooling of the interior
air is more economical and efficient than normal A/C mode. Recirculated
air may also help reduce undesirable odors from entering the vehicle.
Press the MAX A/C button again for normal A/C operation.
7.Temperature control:Controls the temperature of the airflow in the
vehicle.
8.
Fan speed adjustment:Controls the volume of air circulated in
the vehicle.
9.
Power:Press to activate/deactivate the climate control system.
When the system is off, outside air is prevented from entering the
vehicle.
Operating tips
•To reduce fog build-up on the windshield during humid weather,
select
(defrost) or(floor/defrost). Temperature and/or fan
speed can also be increased to improve clearing.
•To reduce humidity build-up inside the vehicle: do not drive with the
system off or with recirculated air engaged and A/C off.
•Do not put objects under the front seats that will interfere with the
airflow to the back seats.
•Remove any snow, ice or leaves from the air intake area at the base of
the windshield.
•To improve the A/C cool down, drive with the windows slightly open
for 2-3 minutes after start up or until the vehicle has been “aired out.”
•A small amount of air may be felt from the floor vent regardless of the
air distribution setting that is selected.
If you are driving during extreme high ambient temperatures and idling
for extended periods of time in gear, it is recommended to run the A/C
in the MAX A/C position, adjust the blower fan speed to the lowest
setting and put the vehicle’s transmission into the P (Park) position to
continue to receive cool air from your A/C system.
Climate Controls
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Reasons given... Consider...
“I have an air bag” Air bags offer greater protection when
used with safety belts. Frontal air
bags are not designed to inflate in
rear and side crashes or rollovers.
“I’d rather be thrown clear” Not a good idea.Peoplewho are
ejected are 40 times more likely
to DIE.Safety belts help prevent
ejection, WE CAN’T “PICK OUR
CRASH”.
WARNING:Do not sit on top of a buckled safety belt or insert a
latchplate into the buckle to avoid the Belt-Minderchime. To do
so may adversely affect the performance of the vehicle’s air bag system
One-time disable
Any time the safety belt is buckled and then unbuckled during an
ignition ON cycle, Belt-Minderis disabled for that ignition cycle only.
Deactivating/Activating the Belt-Minderfeature
Read Steps 1-9 thoroughly before proceeding with the
deactivation/activation programming procedure.
The Belt-Minderfeature can be deactivated/activated by performing the
following procedure:
Before following the procedure, make sure that:
•The parking brake is set.
•The gearshift is in P (Park) (if equipped) or N (Neutral) (automatic
transmissions) or the neutral position (manual transmission).
•The ignition switch is in the off position.
•All vehicle doors are closed.
•The driver’s safety belt is unbuckled.
•The headlamp control is in the
position.
WARNING:While the design allows you to deactivate your
Belt-Minder, this system is designed to improve your chances of
being safely belted and surviving an accident. We recommend you
leave the Belt-Mindersystem activated for yourself and others who
may use the vehicle. To reduce the risk of injury, do not
deactivate/activate the Belt-Minderfeature while driving the vehicle.
Seating and Safety Restraints
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STARTING
Positions of the ignition
1. ACCESSORY – allows the
electrical accessories such as the
radio to operate while the engine is
not running.
2. LOCK – locks the automatic
transmission gearshift lever if
equipped with a P (Park) position
and allows key removal.
3. OFF – shuts off the engine and all
accessories.
4. ON – all electrical circuits operational. Warning lights illuminated. Key
position when driving.
5. START – cranks the engine. Release the key as soon as the engine
starts.
Starting the engine (diesel engine only)
WARNING:Operation of a diesel engine near flammable vapors
in the air may cause the engine speed to increase uncontrollably
and over speed. If this situation occurs, mechanical damage, fire,
explosion, personal injury or death could result.Turning off the
ignition key does not slow or stop the engine due to uncontrollable
fueling of the engine through flammable vapors being drawn into
the engine air inlet.Operation of components such as starter,
alternator, electric motors, etc. and static electricity could also ignite
flammable vapors.
Do not operate the truck in the possible presence of flammable vapors
unless both a complete hazard analysis is performed and necessary
additional safety processes and/or equipment such as vapor testing, air
intake shutoff devices, ventilation, etc. are utilized. The operator is
responsible for using those processes and/or equipment to ensure that
the diesel engine and all other components on the truck can be
operated safely under the specific conditions and hazards that may be
encountered.
Note:When starting the engine, do not press the accelerator as engine
damage may result.
3
1
2
5
4
Driving
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