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IN CASE OF EMERGENCY 289
Dual Rear Wheels
Slots in the wheels will assist in properly
orienting the inner and outer wheels. Align
these slots when assembling the wheels for
best access to the tire valve on the inner wheel.
The tires of both dual wheels must be
completely off the ground when tightening to
ensure wheel centering and maximum 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 (if equipped) 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 loca-
tion. The correct direction of rotation for dual
tire installations must also be observed.
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.
Refer to “Wheel And Tire Torque Specifications”
in “Technical Specifications” for further
information.
Wheel Nuts
All wheel nuts should be tightened occasionally
to eliminate the possibility of wheel studs being
sheared or the bolt holes in the wheels
becoming elongated. This is especially
important during the first few hundred miles/
kilometers of operation to allow the wheel nuts
to become properly set. All wheel nuts should
first be firmly seated against the wheel. The
wheel nuts should then be tightened to
recommended torque. Tighten the wheel nuts
to final torque in increments. Progress around
the bolt circle, tightening the wheel nut opposite
to the wheel nut just previously tightened until
final torque is achieved.
Refer to “Wheel And Tire Torque Specifications”
in “Technical Specifications” for further
information.
TO STOW THE FLAT OR SPARE — IF
E
QUIPPED
Refer to Upfitters Body Builder’s Guide for
information on stowing your spare tire (if
equipped).
HUB CAPS/WHEEL COVERS — IF
E
QUIPPED
The hub caps must be removed before raising
the vehicle off the ground.
For 3500 Single Rear-Wheel (SRW) models, use
the flat end of the lug wrench to hook and pull
off the hub cap. Find the opening in the hub cap,
insert the lug wrench, and pull off the cap. If you
need to pry against the wheel, protect the wheel
surface.
CAUTION!
Use extreme caution when removing the front
and rear wheel covers. Damage can occur to
the center cap and/or the wheel if
screwdriver type tools are used. A pulling
motion, not a pry off motion, is recommended
to remove the caps.
6
20_DPF_OM_EN_USC_t.book Page 289
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