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Front brakes
Hoses:Check for cracked, worn or frayed hoses. Make
sure all couplings are secured.
Chambers:Make sure brake chambers are not cracked or
dented and that they are securely mounted.
Slack adjuster:Check for broken, loose or missing parts. The
angle between the push rod and adjuster arm
should be approximately 90° when the brakes
are applied. When pulled by hand, the push
rod should not move more than approximately
one inch (2.5 cm).
Drum:Make sure there are no cracks, dents or holes
and no loose or missing bolts. Make sure brake
linings are not worn, dangerously thin or
contaminated by lubricant.
Front wheels
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.
Hub oil seal:Check wheel hub oil seal for leaks, and if sight
glass if present, check to see that the oil level
is adequate.
Oil-lubricated front
wheel bearing:If the hubcap has a transparent window, check
for proper lubrication level. If the hubcap does
not have a transparent window, remove the
rubber fill-plug and check for proper level.
WARNING:If a wheel must be changed, obtain expert tire
service help. Mounting and un-mounting of tires should only be
performed by a qualified technician using necessary safety procedures
and equipment, otherwise the result could be property damage,
personal injury or death.
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Driver/Fuel area
Fuel tank(s):Make sure the fuel tank(s) and cap(s) are
secure. Make sure there is no damage to the
tank(s).
Leaks:Check for any leaks from the fuel tank(s).
Underbody of vehicle
Driveshaft:Make sure that the driveshaft is not bent or
cracked. Ensure all driveshaft couplings are
secure.
Exhaust system:Make sure the outside visible parts are
securely mounted. Make sure there are no
cracks, holes or severe dents.
Frame:Check for cracks or bends in longitudinal
frame members. Make sure there are no loose,
cracked, bent, broken or missing
crossmembers or crossmember fasteners.
WARNING:Maintain adequate clearance between all parts of
the exhaust system and all hoses, wires and lines for engine
cooling, brake system, fuel system, power steering system and
electrical system, Heat damage to hoses, wires or lines may cause
vehicle malfunction that could result in property damage, personal
injury or death.
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Rear of vehicle
Air/Electric lines:Make sure that air hoses are not cut, cracked,
chafed or worn. Listen for audible air leaks,
Make sure air and electrical lines are not
tangled, crimped or pinched or being dragged
against any truck parts. Electrical line insulation
should not be cut, cracked, chafed or worn.
None of the air or electrical line should be
spliced or taped. Check for corrosion on pins
and in electrical sockets to ensure continuity
and reduced heat build-up potential.
Deck plate:Make sure deck plate is clean, securely bolted
to the frame and clear of loose objects.
Signal/Brake lights:Make sure both brake lights illuminate when the
brake pedal is applied. Also, make sure each
signal flashes. Make sure that four-way flashers
work properly.
Lights, reflectors:Make sure all lights illuminate and are clean.
Make sure headlights function on both high and
low beams. Make sure reflectors are clean and
unbroken and of proper color (red on rear,
amber elsewhere). Make sure the running lights
are also clean and unbroken. Rear running lights
must be checked separately from signal, flasher
and brake lights.
Tractor - coupling system
Mounting bolts:Check for loose or missing mounting brackets,
clamps, bolts or nuts. Both fifth wheel and slide
mounting must be solidly attached.
Platform:Check for cracks or breaks in the platform
structure.
Safety latch:Make sure safety latch is engaged.
Release arm:Make sure safety latch is in the engaged
position and that any safety latch is in place.
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Tractor - coupling system
Kingpin/Apron:Make sure kingpin is not bent or worn. Also
make sure that the apron lies flat on the fifth
wheel skid plate and that the visible part of the
apron is not bent, worn, cracked or broken.
Rear suspension
Springs:Check for broken or shifted leaves or leaves
that are in contact, or nearly contacting a tire,
rim, brake drum, frame or body component.
Check for missing or broken leaves in the leaf
spring.
Spring mounts:Check for cracked or broken spring hangers,
broken, missing or loose bolts, missing or
damaged bushings, broken, loose or missing
axle mounting parts.
Torsion, shocks:Make sure torsion arm is not cracked, broken
or missing. Check the shock absorber for
cracks or leaks; there should be no missing or
broken mounting bolts or worn bushings.
Rear brakes
Hoses:Checked for cracked, worn or frayed hoses.
Make sure all couplings are secured.
Chambers:Make sure brake chambers are not cracked or
dented and that they are securely mounted.
Slack adjuster:Check for broken, loose or missing parts. The
angle between the push rod and adjuster arm
should be approximately 90° when the brakes
are applied. When pulled by hand, the push
rod should not move more than approximately
one inch (2.5 cm).
Drum:Make sure there are no cracks, dents or holes
and no loose or missing bolts. Make sure brake
linings are not worn, dangerously thin or
contaminated by lubricant.
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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 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
check 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.
Check the transmission fluid level and shift linkage for proper operation.
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WARNING LIGHTS AND CHIMES
Warning lights and gauges can alert you to a vehicle condition that may
become serious enough to cause expensive repairs. A warning light may
illuminate when a problem exists with one of your vehicle’s functions.
Many lights will illuminate when you start your vehicle to make sure the
bulb works. If any light remains on after starting the vehicle, have the
respective system inspected immediately.
Some of the warning lights shown are optional based on vehicle
equipment; your vehicle may not have some of the warning lights shown
in this section.
Service engine soon:If this light
illuminates while driving, it is a
possible indication that one of the
engine’s emission control systems
has failed.
Check suspension (if equipped):
Illuminates when the air suspension
dump switch has been activated.
SERVICE
ENGINE
SOON
Instrument Cluster
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Stop engine:This light is used in
conjunction with the electronic
engine control. When illuminated,
the STOP ENGINE lamp indicates the need tostopthe engine as soon
as it can be safely done.
If the STOP ENGINE 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.
Refer to your engine operator’s manual for specific information regarding
this feature.
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, refer toEngine automatic shutdown warning light or
chime (if equipped)in theDrivingchapter of this owner guide and/or
your engine operator’s manual.
Drivers of electronically controlled engines should know the
extent of warning engine shutdown system before operating the
vehicle.
STOP
ENGINE
Instrument Cluster
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Brake system warning light:To
confirm the brake system warning
light is functional, this light will
momentarily illuminate when the
ignition is turned to the on position when the engine is not running. If
the brake system warning light does not illuminate at this time, seek
service immediately from your dealership. Illumination after starting the
vehicle indicates a brake system fault and should be inspected
immediately by your dealership.
Note:The Brake System Warning light may be accompanied by a
warning buzzer or chime.
If equipped with an air brake system,the warning light stays on until
the air pressure builds up to 60 psi (414 kPa). If the air pressure drops
below 60 psi (414 kPa) during operation, the remaining brake system is
still operational but the stopping distance will be greater.
WARNING:Driving a vehicle with the brake system warning
light on is dangerous. A significant decrease in braking
performance may occur. It will take you longer to stop the vehicle.
Have the vehicle checked by your dealer immediately. Driving
extended distances with the parking brake engaged can cause brake
failure and the risk of personal injury.
Wait to start:Indicates the air
intake heater is in operation and
special starting procedures are
required. Refer toStartingin the
Drivingchapter.
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.
WAIT
TO
START
Instrument Cluster
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USA(fus)