User Manual

7. Mounting hardware for corrosion,
proper tightness of bolts and nuts
8.
Web for deterioration, due to
exposure to the sun
Factors contributing to reduced seat belt
life:
• Heavy trucks typically accumulate
twice as many miles as the
average passenger car in a given
time period.
• Seat and cab movement in trucks
causes 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.
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 (retrac-
tor and buckle side) if replacement of
any one part is necessary. Unexposed
damage to one or more components
could prevent the system from func-
tioning properly the next time it is
needed. Failure to comply may result
in death or personal injury.
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 parts of the cab interior
.
These areas are typical places
where the web will experience
cutting or abrasion. Cuts, fraying,
or excessive wear would indicate
the need for replacement of the
seat belt system.
2. The pillar web guide (D-loop) is the
area where almost constant
movement of the seat belt webbing
occurs because of relative
movement between the seat and
cab.
3. Check the Komfort Latch for cracks
or possible damage and check for
proper operation.
4. Check buckle and latch for proper
operation and to determine if latch
plate is worn, deformed, or
damaged.
5. Inspect the retractor web storage
device, which is mounted on the
floor of the vehicle, for damage.
The retractor is the heart of the
occupant restraint system and can
often be damaged if abused, even
unintentionally. Check operation to
ensure that it is not locked up and
MAINTENANCE - Safety Restraint System - Inspection
224 Y53-6113-1A1 (11/20)
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