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PREVENTIVE MAINTENANCE TIRES AND WHEELS
Regional Haul
(R05/10) Y53-6033 – 209 –
Tire Replacement
Front: replace front tires when less than 4/32 in. of tread
depth remains. Check depth at three places equally
spaced around the tire.
Drive Axles or Trailers: replace tires on drive axles when
less than 2/32 in. of tread depth remains in any major
groove. Check depth at three places equally spaced
around the tire.
WARNING! Do not install regrooved or rein-
forcement-repaired tires on steering axles.
They could fail unexpectedly and cause you
to lose control of your vehicle resulting in an
accident causing death or personal injury.
WARNING! Do not replace original equipment
tires with load ratings less than the original
tires. Doing so could lead to unintentional
overloading of the tire, which could cause a
failure resulting in loss of vehicle control and
an accident causing death or personal injury.
NOTE: To prolong the tires' life and make them
safer, have their radial and lateral run-out
checked at your Peterbilt Dealer. And of course
have the tires balanced any time you change a
tire.
Matching Tires
Be sure to buy matched tires for your vehicle, especially
on the rear axles. Mismatched tires can cause stress
between axles and cause the temperature of the axle
lubricant to get too hot. Matched tires will help the drive-
line last longer and will give you better tire mileage.
WARNING! Do not mismatch tires, it can be
dangerous. Never mix tires of different design
such as steel belted radials and bias ply tires,
etc. Mixing tire types and sizes will adversely
affect the road-holding ability of both types of
tires and can lead to loss of vehicle control
and causing death or personal injury.
Make sure, too, that you use the right size tires on each
wheel. Some trucks require different sizes on front and
rear wheels. For safety, always use the recommended
size and type of tires.