User Manual

such as flex break, radial cracks, and ply
separation. Low pressure may af
fect
control of your vehicle, especially at the
front wheels. Most tire wear problems are
caused by underinflation as the result of
slow leaks, so check tire pressure
regularly. Lower tire pressure does not
provide better traction on ice or snow. Give
your tires a visual test every day, and
check inflation with a gauge every week:
• When checking tire pressure,
inspect each tire for damage to
sidewalls, cuts, cracks, uneven
wear, rocks between duals, etc. If a
tire appears underinflated, check
for damage to the wheel assembly.
Don’t forget to check between dual
wheels. If you find wheel damage,
have an expert tire service repair it.
• Maximum tire pressure will be
indicated on the sidewall of a tire.
• Check pressure only when the tires
are cool. Warm or hot tires cause
pressure buildup and will give you
an inaccurate reading. So never
deflate a warm tire to the specified
pressure.
WARNING
DO NOT operate a vehicle with under-
inflated tires. The extra heat caused by
underinflation
can cause sudden tire
failure such as a tire fire or blow out,
which can cause an accident resulting
in death or personal injury. Low pres-
sure may affect control at the front
wheels, which could result in an acci-
dent involving death or personal injury.
Keep your tires inflated to the manu-
facturer's recommended air pressure.
WARNING
DO NOT attempt to raise the vehicle to
remove
or install a damaged tire and
wheel assembly if you are not fully
qualified and not equipped with the
proper tools and equipment. DO NOT
attempt to reinflate a tire that has been
run flat. Obtain expert help. A person
can be seriously injured or killed if us-
ing the wrong service methods. Truck
tires and wheels should be serviced
only by trained personnel using proper
equipment. Follow OSHA regulations
per section 1910.177.
NOTE
Follow all warnings and cautions con-
tained
within the tire and wheel manu-
facturers literature.
Overloaded Tires
Overloading your truck is as damaging to
your tires as underinflation. The following
chart shows how neglect or deliberate
abuse can af
fect the life of your tires.
Effects of Load and Pressure on
Tire Life
Vehicle
Load
Tire
Pressure
Expected
T
otal Tire
Mileage
Normal Normal Normal
20% Over 20% Low 70%
40% Over 30% Low 50%
MAINTENANCE - Tires
Y53-6113-1A1 (11/20) 267
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