2012 Ford F250 Super Duty Owner Guide 4th Printing - Page 347

Roadside Emergencies WHEEL LUG NUT TORQUE SPECIFICATIONS WARNING: When a wheel is installed, always remove any corrosion, dirt or foreign materials present on the mounting surfaces of the wheel or the surface of the wheel hub, brake drum or brake disc that contacts the wheel. Ensure that any fasteners that attach the rotor to the hub are secured so they do not interfere with the mounting surfaces of the wheel. Installing wheels without correct metal-to-metal contact at the wheel mounting surfaces can cause the wheel nuts to loosen and the wheel to come off while the vehicle is in motion, resulting in loss of control. On vehicles equipped with single rear wheels, retighten the lug nuts to the specified torque at 100 miles (160 km) after any wheel disturbance (tire rotation, changing a flat tire, wheel removal, etc.). On vehicles equipped with dual rear wheels, retighten the wheel lug nuts to the specified torque at 100 miles (160 km), and again at 500 miles (800 km) of new vehicle operation and after any wheel disturbance (tire rotation, changing a flat tire, wheel removal, etc.). Wheel lug nut torque* ft-lb N •m M14 x 1.5 165 224 * Torque specifications are for nut and bolt threads free of dirt and rust. Use only Ford recommended replacement fasteners. It is important to follow the proper wheel mounting and lug nut torque procedures. On all two-piece flat wheel nuts, apply one drop of motor oil between the flat washer and the nut. Bolt size 347 2012 F-250/350/450/550 (f23) Owners Guide, 4th Printing USA (fus)