Volvo D12, Operator'S Manual

Page: 156 / 214

152 Maintenance
Wheels
Before checking the wheels, set the
parking brakes, place the transmission in
neutral and block the wheels. Failure to
do so can result in unexpected vehicle
movement and can cause serious per-
sonal injury or death. Wheels must be serviced only by a qual-
ified technician. Do not do this work
yourself. Inflated tires on wheels contain
compressed air and if suddenly released,
do so with an explosive force. Serious
personal injury or death can occur.
Check wheels for signs of rust streaks
around the wheel nuts. This indicates loose-
ness (steel rims). Inspect all types of rims
for cracks. Cracks can appear in many
places but typically radiate out from where
a load is applied. Inspect closely around
wheelnuts, handholes and inside
circumference.
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Wheel Nut Tightening
After the initial tightening, retightening
must be made within the first 500 miles
(800 km). After the first retightening, only
normal inspection of nut tightness is
needed.
Check front and rear wheel nut tightness
with a torque wrench. All disc wheels for
Volvo vehicles have a tightening torque of
450 ft-lb (610 Nm). Tighten the nuts in the
correct sequence. For spoke wheels, check
the manufacturer’s specifications. Inspect
bolts and nuts for signs of wear or cracks.
Make sure that the bolts are not bent.
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