Wheel Nut and Rim Nut Torque Check
Caution: Insufficient wheel nut (rim nut) torque can cause wheel shimmy, resulting in wheel damage, stud breakage, and extreme tire tread wear. Excessive wheel nut torque can break studs and clamps (if so equipped), damage threads, and crack discs in the stud hole area. Use the recommended torque values, and follow the tightening sequence shown in Fig..
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8-Stud Disc Wheel
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10-Stud Disc Wheel
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6-Spoke Wheel
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5-Spoke Wheel
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12-Stud Wheel Rim
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12-Stud Wheel Rim Adaptor
Fig. 1, Wheel Nut and Rim Nut Tightening Sequence
After an 8- or 10-stud wheel has been installed, the wheel or rim nut torque must be rechecked after 50 to 100 miles (80 to 161 km) of operation.
See for wheel nut torque specifications, and see Fig. for the wheel nut tightening sequence.
Table 1, Wheel Fastener Torque
| Wheel Fastener Torque | |||
| Application | Nut Size | Wheel Manufacturer | |
| 8-Stud Disc Wheel With Two-Piece Flanged Locknuts | |||
Table 1, Wheel Fastener Torque
|
Front and Rear Wheel Nut |
— |
All |
450–500 (610–680)12 |
| 10-Stud Disc Wheel With Two-Piece Flanged Nuts | |||
- Torque values given for these fasteners are for lubricated threads.
Table 1, Wheel Fastener Torque
|
Front and Rear Wheel Nut |
M22 x 1.5 |
All |
450–500 (610–680)12 |
| 10-Stud Disc Wheel With Inner and Outer Locknuts | |||
|
Front Wheel Nut |
1-1/8–16 |
Alcoa |
400–500 (540–680) |
|
All Others |
450–500 (610–680) |
||
- Torque values given for these fasteners are for lubricated threads.
Table 1, Wheel Fastener Torque
|
Rear Wheel Inner Nut |
3/4–16 |
Alcoa |
400–500 (540–680) |
|
All Others |
450–500 (610–680) |
Table 1, Wheel Fastener Torque
|
Rear Wheel Outer Nut |
1-1/8–16 |
Alcoa |
400–500 (540–680) |
|
All Others |
450–500 (610–680) |
Table 1, Wheel Fastener Torque
|
Wheel Stud Retainer Nut |
3/4–16 |
All |
175–200 (235–270) |
| 12-Stud Wheel Rim Clamp and Nuts | |||
Table 1, Wheel Fastener Torque
|
Adaptor Wheel Nut on Inside Bolt Circle |
M22 x 1.5 |
OTR |
450–500 (610–680) |
|
Adaptor Wheel Nut on Outside Bolt Circle |
3/4–10 |
OTR |
50 (68)34100 (136) 150 (203) |
|
Rear Wheel Nut |
3/4–10 |
OTR |
50 (68)34 100 (136) 150 (203) |
| Spoke Wheel Rim Nuts | |||
- Use the tightening sequence shown in Fig. for each of the three stages of tightening.
- Use the tightening sequence shown in Fig. for each of the three stages of tightening.
Table 1, Wheel Fastener Torque
|
Front Wheel Nut, 5- and 6-Spoke |
3/4–10 |
Gunite |
200–225 (271–305)5 |
|
Rear Wheel Nut, 5- and 6-Spoke With Non-Corrugated Channel Spacer |
3/4–10 |
Gunite |
200–225 (271–305) |
|
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 lb (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 1, Wheel Fastener Torque
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 wheel nuts, using the tightening sequence shown in Fig..
After a 12-stud wheel rim has been installed, the wheel or rim nut torque must be rechecked as follows:
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after the first load;
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every four hours of operation for a minimum of five days;
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every 8 to 10 hours of operation.
When checking wheel or rim nut torque on 12-stud wheel rims, use the tightening sequence shown in Fig. for each of the three stages of tightening as follows:
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Tighten each nut 50 lbf·ft (68 N·m).
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Tighten each nut 100 lbf·ft (136 N·m).
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Tighten each nut 150 lbf·ft (203 N·m).
For additional information on 12-stud wheel rims, see Section 40.00, Subject 220 of the Western Star Workshop Manual.