User Manual

endures heavy use in heavy-duty vehicles,
much more than seat belt systems in
passenger cars. All users should be aware
of the factors contributing to this heavy use
and reduced belt life.
WARNING
Failure to properly inspect and main-
tain restraint systems can lead to in-
jury or loss of life. Without periodic in-
spection and maintenance to detect
unsafe conditions, seat restraint com-
ponents can wear out or not protect
you in an accident.
Factors contributing to reduced seat belt
life:
• High mileage heavy trucks, often
accumulate mileage in excess of
500,000 total miles (800,000 km)
during the vehicle lifetime. This is
much greater than a typical
passenger car, which frequently
will not exceed 125,000 total miles
(200,000 km).
• Seat and cab movement in trucks,
there is almost constant movement
of the belt due to ride
characteristics and seat design.
The constant movement of the belt
inside the restraint hardware and
the potential for the belt to come in
contact with the cab and other
vehicle parts, contributes to the
wear of the entire system.
• Environmental conditions, such as
dirt and ultraviolet rays from the
sun, will reduce the life of the seat
belt system.
Due to these factors, the three-point safety
belt system installed in your vehicle
requires thorough inspection every 20,000
miles (32,000 km). If the vehicle is exposed
to severe environmental or working
conditions, more frequent inspections may
be necessary. Any seat belt system that
shows cuts, fraying, extreme or unusual
wear, significant discoloration due to UV
(ultraviolet) exposure, abrasion to the seat
belt webbing, or damage to the buckle,
latch plate, retractor hardware or any other
obvious problem should be replaced
immediately, regardless of mileage.
WARNING
It is important to remember that any
time a vehicle is involved in an acci-
dent, the entire seat belt system must
be replaced. Unexposed damage
caused by the stress of an accident
could prevent the system from func-
tioning properly the next time it is
needed. Failure to comply may result
in personal injury or death.
Inspection Guidelines
Follow these guidelines when inspecting
for cuts, fraying, extreme or unusual wear
of the webbing, and damage to the buckle,
retractor, hardware, or other factors.
Damage to these areas indicates that belt
system replacement is necessary.
CONTROLS - Seats
46 Y53-6078-1B1 (12/18/18)
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