8-Stud — Dual Rear Wheels
• Dual wheels are flat-mounted and center-piloted. The lug nuts are a two-piece
assembly. When the tires are being rotated or replaced, clean these lug nuts and
add two drops of oil at the interface between the hex and the washer.
• Slots in the wheels will assist in prop-
erly orienting the inner and outer
wheels. Align these slots when assem-
bling the wheels for best access to the
tire valve on the inner wheel. The tires
of both dual wheels must be com-
pletely off the ground when tightening,
to ensure wheel centering and maxi-
mum wheel clamping.
•
Dual wheel models require a special heavy-duty lug nut tightening adapter (included
with the vehicle) to correctly tighten the lug nuts. Also, when it is necessary to remove
and install dual rear wheels, use a proper vehicle lifting device.
NOTE:
When installing a spare tire as part of a dual rear wheel end combination, the tire
diameter of the two individual tires must be compared. If there is a significant
difference, the larger tire should be installed in a front location. The correct direction
of rotation for dual tire installations must also be observed.
These dual rear wheels should be tightened as follows:
1. Tighten the wheel nuts in the num-
bered sequence to a snug fit.
2. Retighten the wheel nuts in the same
sequence to the torques listed in the
table. Go through the sequence a sec-
ond time to verify that specific torque
has been achieved. Retighten to
specifications at 100 miles (160 km)
and after 500 miles (800 km).
• It is recommended that wheel stud nuts be kept torqued to specifications at all
times. Torque wheel stud nuts to specifications at each lubrication interval.
WHAT TO DO IN EMERGENCIES
118
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