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40–01 Wheel Nut and Rim Nut Checking IMPORTANT: In addition to the maintenance See for wheel nut torque specifications, and see for the wheel nut tightening sequence. CAUTION Insufficient wheel nut (rim nut) torque can cause breakage, and extreme tire tread wear. Excessive When checking wheel nuts on a dual disc assembly, Wheel Fastener Torque Description Nut Size Wheel Manufacturer Torque (dry threads): lbf·ft (N·m) 8-Stud Disc Wheel With Two-Piece Flanged Locknuts Front and Rear Wheel Nut — All 450–500 (610–680) * 10-Stud Disc Wheel With Two-Piece Flanged Nuts Front and Rear Wheel Nut M22 x 1.5 Budd (Uni–Mount 10) 390–440 (530–600) * 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) Rear Wheel Inner Nut 3/4–16 Alcoa 400–500 (540–680) All Others 450–500 (610–680) Rear Wheel Outer Nut 1-1/8–16 Alcoa 400–500 (540–680) All Others 450–500 (610–680) Wheel Stud Retainer Nut 3/4–16 All 175–200 (235–270) Spoke Wheel Rim Nuts Front Wheel Nut, 5- and 6-Spoke 3/4–10 Gunite and Dayton 200–225 (271–305) † Rear Wheel Nut, 5- and 6-Spoke With Non-Corrugated Channel Spacer 3/4–10 Gunite and Dayton 200–225 (271–305) Rear Wheel Nut, 5- and 6-Spoke With Corrugated Channel Spacer 3/4–10 Gunite and Dayton 240–260 (325–350) * Torque values given are for lubricated threads. † 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 1, Wheel Fastener Torque Wheels and Tires 40 Heavy-Duty Trucks Maintenance Manual, January 1997 40/1 |