VEHICLE LOADING PART 8: MAINTENANCE AND SERVICE
– 164 – Y53-6007 (R10/06)
Wheel Nuts
• Hub pilot nut has a hex body and a flange for clamp-
ing against wheel face. Hex size is 33 mm (same as 1-
5/16 in.).
• Inner and outer cap nuts mate with spherical cham-
fers on wheels. Inner nut has 13/16 in. square end.
Outer nut has 1-1/2 in. hex.
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.
WARNING!
• Ensure that the bolts and nuts are clean and
free of any oils or grease. Failure to do so
will result in improper wheel clamping
which can result in an injury accident.
• Tighten wheel cap nuts properly. If they are
not tightened properly, wheel nuts could
eventually cause the wheel to become
loose, to fail, and/or to come off while the
vehicle is moving, possibly causing loss of
control and/or personal injury or damage to
the vehicle.
Wheel Bearing Adjustment
For safe, reliable operation and adequate service life, your
wheel bearings must be checked and adjusted properly.
The person best equipped to do this is your authorized
dealer’s service mechanic.
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