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 stud-piloted 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., 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 breakage, 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. for wheel nut torque specifications and see Fig. for the tightening sequence.
Table 1, Wheel Nut Torque Specifications
|
Wheel Nut Torque Specifications |
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|
Thread Size |
Wheel Manufacturer |
Torque (oiled): lbf·ft (N·m) |
|
M20 x 1.5 |
Accuride Corporation |
280 to 330 (380 to 447) |
|
Alcoa Incorporated |
||
|
M22 x 1.5 |
Accuride Corporation |
450 to 500 (610 to 678) |
|
Alcoa Incorporated |
||
|
1-1/8–16 |
Accuride Corporation |
450 to 500 (610 to 678) |
|
Alcoa Incorporated |
||
|
3/4–16 |
Accuride Corporation |
450 to 500 (610 to 678) |
|
Alcoa Incorporated |
||
Table 1, Wheel Nut Torque Specifications
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8-Stud Disc Wheel
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10-Stud Disc Wheel