Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...

PART 8: MAINTENANCE AND SERVICE
Wheels And Rims
WARNING! Mismatched wheel components are
dangerous. Equipment that does not exactly
match original specifications or that is mismatched
could cause your wheels to break
and separate from the vehicle. The resulting
accident could be very serious. Each mounting
system is engineered for use only with its
correct mating part. Be sure properly matched
components are used for each type of mounting.
Wheel Cap Nut Torque
At the first 100 miles, have all wheel cap nuts torqued to
their specified value. After that, check wheel cap nuts at
least once a week. Contact the Service Department at your
dealership 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. You need the right torquing equipment
to do it.
Wheel Bearing Adjustment
The person best equipped to do this is your authorized
dealer’s service mechanic.
Disc Wheels
To check the torque on disc wheels, follow the crisscross
sequence shown. See the Specifications chart for proper
torque specification.
WARNING!
• Grooves in the wheel disc or other damage
to the disc can lead to a serious accident.
The disc will be weakened and can eventually
come off, maybe causing you to lose control
of your vehicle. Be sure to use the right components
and the right tools.
• The end of the wheel wrench must be
smooth. Burrs on the end of the wrench
can tear grooves in the disc, especially on
aluminum wheels. These grooves may lead
to cracks in the disc, and can cause it to fail.
For safe, reliable operation and adequate service life, your
wheel bearings must be checked and adjusted properly.
R(08/07) Y53-6015 – 159 –