Peterbilt Medium Duty Truck Owner's Manual - Peterbilt Motors

Preventive Maintenance
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.
Cab Maintenance
WARNING! It is important to remember that any
time a vehicle is involved in an accident, the
entire seat belt system must be replaced. Unexposed
damage caused by the stress of an accident
could prevent the system from functioning
properly the next time it is needed, which could
result in severe injury or even 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.
WARNING! Replace the entire belt system
(retractor and buckle side) if replacement of any
one part is necessary. Unexposed damage to
one or more components could prevent the system
from functioning properly the next time it is
needed, which could result in severe injury or
even death.
1. Check the web wear in the system. The webbing must be
closely examined to determine if it is coming into contact
with any sharp or rough surfaces on the seat or other
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