Issue link: https://read.dmtmag.com/i/34500
Correct components must be used. It is important to note that some hub piloted and stud piloted wheels may have the same bolt circle pattern. Therefore, they could mistakenly be interchanged. Each mounting system requires the correct mating parts. It is important that the proper components are used for each type of mounting and that the wheel is fitted to the proper hub. If hub piloted wheel components (hubs, wheels, and fasteners) are mixed with stud piloted wheel components, loss of torque, broken studs, cracked wheels, and possible wheel loss can occur, which can lead to injury or death. These parts are not designed to be interchangeable. Refer to TMC RP 217B, Attaching Hardware for Disc Wheels, and TMC RP 608A, Brake Drums and Rotors. NOTE: Some states and provinces have laws that dictate sufficient thread engagement or thread engagement past the nut body. Make sure you know the laws for the states and provinces in which you operate and comply. TORQUE Stud piloted, ball seat mounting system: Left hand threads are used on the left side of the vehicle. Right hand threads are used on the right side of the vehicle. Tighten the nuts to 50 foot- pounds using the sequence shown. Check that the wheel is properly positioned, then tighten to recommended torque using the sequence shown. It is recommended that studs and nuts on a stud piloted mounting system should be free of rust and debris. They should then be torqued “dry” to 450-500 foot-pounds. After 50 to 100 miles of operation, torque should be rechecked. Hub piloted mounting system: Most North American manufacturers of highway trucks, tractors and trailers, which incorporate the hub piloted wheel mounting system, require wheel studs and 2-piece flange nuts with metric threads. Most frequently these are M22 x 1.5. Before installing 2-piece flange nuts apply 2 drops of SAE (Society of Automotive Engineers) 30W oil to the last 2 or 3 threads at the end of each stud and 2 drops to a point between the nuts and flanges. This will help ensure that the proper clamping force is achieved when final torque is reached. Lubrication is not necessary with new hardware. To aid in installation and removal of aluminum wheels, some wheel manufacturers recommend lubricating the hub bore and/or pilot pads. Check with your wheel manufacturer for additional direction. Note:When retrofitting a dual equipped tractor with steel wheels to an aluminum wheel with MICHELIN X One tire, it may be necessary to install longer studs to obtain proper thread engagement of the nut. This is due to the aluminum wheel’s disc face being approximately 1⁄4" thicker than two steel wheels in dual. Lubricate Here Torque Sequence: Both stud piloted and hub piloted wheel systems use the same torque sequence. Tighten the flange nuts to 50 foot-pounds using the sequence shown. Check the disc wheel for positioning on the pilots and proper seating against the drum face. Tighten to 450 to 500 foot-pounds using sequence shown. After 50 to 100 miles of operation, torque should be rechecked. Ten Stud Eight Stud Tire and Wheel Nomenclature 7