Sterling Trucks Acterra MX - Manual (Page 95)

40–01 Wheel Nut Checking
IMPORTANT: In addition to the maintenance
interval in this manual, check the wheel nut
torque the first 50 to 100 miles (80 to 160 km)
of operation after a wheel has been removed
and installed.
When checking wheel nuts on a dual disc assembly,
remove one outer nut at a time, tighten the inner nut,
then reinstall the outer nut. Repeat this procedure for
all of the inner wheel nuts in the sequence shown in
Fig. 1 , then tighten all of the outer wheel nuts in the
same sequence.
CAUTION
Too little wheel nut torque can cause wheel
shimmy, resulting in wheel damage, stud break-
age, and extreme tire tread wear. Too much wheel
nut torque can break studs, damage threads, and
crack discs in the stud hole area.
See Table 1 , Table 2 , or Table 3 for wheel nut
torque specifications.
Fastener Torque for 10-Hole Disc Wheel
With Inner and Outer Locknuts
Description Nut Size
Wheel
Manufacturer
Torque (dry threads):
lbf·ft (N·m)
Front Wheel Nut 3/4–16, 1-1/8–16 Accuride 450–500 (610–680)
Rear Wheel Inner Nut 3/4–16 Accuride 450–500 (610–680)
Rear Wheel Outer Nut 1-1/8–16 Accuride 450–500 (610–680)
Wheel Stud Retainer Nut 3/4–16 Accuride 175–200 (235–270)
Table 1, Fastener Torque for 10-Hole Disc Wheel With Inner and Outer Locknuts
Fastener Torque for 8-Hole Disc Wheel
With Cone Locknuts
Description Nut Size
Torque (lubricated threads):
lbf·ft (N·m)
Front and Rear Wheel Nuts M20 280–310 (380–420)
Table 2, Fastener Torque for 8-Hole Disc Wheel With Cone Locknuts
Spoke-Type Wheel Fastener Torque
Description Size
Wheel
Manufacturer
Torque (dry threads):
lbf·ft (N·m)
Front Wheel Nut, 5- and
6-Spoke
3/4–10 Gunite 200–225 (270–305) *
Rear Wheel Nut, 5- and
6-Spoke With Channel Spacer
3/4–10 Gunite 200–225 (270–305)
Rear Wheel Nut, 5- and
6-Spoke With Corrugated
Channel Spacer
3/4–10 Gunite 240–260 (325–350)
* On front axles with over 12,000 lbs (5448 kg) capacity, tighten the wheel nuts 240 to 265 lbf·ft (325 to 359 N·m).
Gunite part number W–854 nut with a phosphate and oil coating must be used.
Table 3, Spoke-Type Wheel Fastener Torque
Wheels and Tires
40
Acterra Maintenance Manual, March 2000 40/1