Section 13: WHEELS, HUBS & TIRES
PA1593
5
NOTE
Wheel studs and nuts must be kept free from
grease and oil. No lubricant whatsoever
should be used.
6. HUB MOUNTED WHEELS
Wheel surfaces in contact with hubs, nuts or
other wheels should be kept free of all rust,
grease and paint (except for initial “E” coat
protection, applied to stop rusting and to
facilitate wheel removal). The reason for this is
to assure that all faces are clamped together
without buildup of any coating. The threads of
the wheel studs and the wheel nuts should be
clean and undamaged.
NOTE
When painting wheels, make sure to mask all
surfaces identified above.
Using a calibrated torque wrench, tighten wheel
nuts to 450 - 500 lbf-ft (610 - 680 Nm) of torque.
Do not use power tools or long bars for
tightening. Tighten wheel nuts alternately as
shown in figure 2.
NOTE
Tightening should not be done immediately
after prolonged braking or when wheel ends
are hot.
Check wheel nut torque at every 100 miles (160
km) for 500 miles (800 km) after fitting wheels.
Let cool before checking. If any relaxation of the
initial 450 - 500 lbf-ft (610 - 680 Nm) of torque
has occurred, retighten. Relaxation of initial
torque may occur because of the “bedding
down” of the hub and wheel surfaces.
NOTE
Torque relaxation occurs when wheel ends
are hot but should revert to original setting
when cool. Retightening when hot will produce
a higher torque reading than recommended.
FIGURE 6: FRONT & TAG AXLE WHEEL HUB
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