Regional Haul Model Operator's Manual - Peterbilt Motors Company

PREVENTIVE MAINTENANCE
TIRES AND WHEELS
dent causing death or personal injury. The maximum
vehicle load rating (GVWR) is found on the Tire and
Rim Data label on the driver's door.
Overloading your vehicle is as damaging to the tires as
underinflation. It significantly affects the expected life
(total mileage of a tire). The following chart shows how
neglect or deliberate abuse can affect the life of your vehicle's
tires.
Table 6 Effect of Load Pressure on Tire Life
Vehicle Load Normal 20% Over 40% Over 60% Over 80% Over 100% Over
Tire Pressure Normal 20% Low 30% Low 35% Low 45% Low 55% Low
Expected Total Tire
Mileage
Normal 70% 50% 40% 30% 25%
Wheel Mounting and Fastening
After the vehicle travels about 50 to 100 miles (80 to 160
km), wheel mountings “seat in” and will lose some initial
torque. Check hub/wheel mountings after this initial period
and retighten.
Wheel Cap Nut Torque
At the first scheduled lube interval, have all wheel cap
nuts torqued to their specified value. See Table 7, “Wheel
Cap Nut Torque,” Page 205 After that, check wheel cap
nuts at least once a week. Contact an Authorized Service
Center for information on the proper installation procedure
for the wheels on your truck. This is a job you may not be
able to do yourself if you do not have the right equipment.
Regional Haul (R05/10) Y53-6033 – 203 –