freightliner C SB FS65, Руководство по обслуживанию

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40–01 Wheel Nut and Rim 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 , Table 3 , or Table 4 for wheel
nut torque specifications, and see Fig. 1 for the tight-
ening sequence.
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
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
Description Nut Size
Torque (lubricated threads):
lbf·ft (N·m)
Front and Rear Wheel Nuts M22 390–500 (529–678)
Table 3, Fastener Torque for 10-Stud Hub-Piloted Wheels
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
(
Fig. 2 )
3/4–10 Gunite 200–225 (270–305)
Rear Wheel Nut, 5- and
6-Spoke With Corrugated
Channel Spacer (
Fig. 3 )
3/4–10 Gunite 240–260 (325–350)
Table 4, Spoke-Type Wheel Fastener Torque
Wheels and Tires
40
School Bus Chassis Maintenance Manual, October 1996
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