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DISC WHEEL INSTALLATION PROCEDURE— RECOMMENDED MOUNTING TORQUE FOR DISC WHEELS Mounting Type Nut Tread 11⁄16"–16 Hub piloted with flange nut M20 x 1.5 M22 x 1.5 Torque Level Ft-Lb (Oiled) 300-400 280-330 450-500 Ft-Lb (Dry) Stud piloted, double cap nut Standard type (7⁄ 8" radius) 3 ⁄4"–16 1-1⁄ 8"–16 15 ⁄16"–12 Stud piloted, double cap nut Heavy duty type (1-3⁄16" radius) 1-1⁄ 8"–16 1-15 ⁄16"–12 Notes: 1. If using specialty fasteners, consult the manufacturer for recommended torque levels. 2. Tightening wheel nuts to their specified torque is extremely important. Under-tightening, which results in loose wheels, can damage wheels, studs, and hubs and can result in wheel loss. Over-tightening can damage studs, nuts, and wheels and result in loose wheels as well. 3. Regardless of the torque method used, all torque wrenches, air wrenches and any other tools should be calibrated periodically to ensure the proper torque is applied. Reprinted with permission from TMC RP 222B, User’s Guide to Wheels and Rims, published by the Technology & Maintenance Council (TMC) of the American Trucking Associations, 2200 Mill Road, Alexandria, VA 22314 (703) 838-1776. 450-500 450-500 750-900 750-900 750-900 128 Section Nine: Appendix