Heavy Duty Trucking, September 2018
Stud fastening Before installing the nuts place two or three drops of motor oil on the clean threads of the studs and one or two drops of motor oil between the washer and the nut on the two piece flange nut This reduces friction and allows you to achieve a desirable clamping force once the wheel is torqued down Ensure the two piece flange nuts are in good condition and not seized between the nut and the flange Run several nuts onto the studs using two or three drops of oil on the stud and between the washer and the nut on the two piece flange nut Use three or four nuts at light torque to hold the wheel in place on the hub and check for concentric mounting of the wheel on the hub This will display as a high and low spot when rotating the wheel Resolve the runout problem before installing and torqueing the remaining fasteners When mounting a pair of wheels in a dual assembly ensure the diameter of the two tires is identical Even a tiny difference can result in excessive scrubbing of the tires causing premature wear Wheel nut torqueing Verify the correct torque requirements for the wheel being installed The Technology Maintenance Councils Recommended Practice 237A Torque Checking Guidelines for Disc Wheels shows torque fastener recommendations ranging from 300 to 900 ft lbs depending on the wheel type fastener and procedure Always use calibrated torque wrenches to torque lug nuts to manufacturer recommended specifications warns Eck Following manufacturers recommendations on proper torque will reduce the chances of a wheel off and vehicle damage Finally check to ensure there is no side to side movement of the rotating assembly Once the tire is installed a runout gauge should be used to confirm the trueness of the wheel assembly If its not true its effect is to lead a vehicle alternately left and right as it rolls along creating the perception of a shimmy or wobble says Green If its not running true something is amiss Dont ignore this area If you do expect problems down the road The final step in the process is to retorque the wheel nuts somewhere between 50 and 100 miles after a wheel has been installed This is important because the wheel will settle into place during this period Foreign matter may work its way out of the mounting surfaces causing a loss of bolt tension and a loss of clamping force Installing tires and wheels isnt all brute force or at least it shouldnt be The final check and adjustment will help reduce irregular wear and possibly prevent a wheel separation Both are well worth taking a little extra care during installation LEGACY RESILIENCE STRENGTH RIDE WITH THE RHINO 1 877 57RHINO Interested in becoming a dealer Visit armstrongtire com become a dealer LOOKING FOR AN ARMSTRONG DEALER find armstrongtire com authorizeddealers ASH ADH ATH ASR ADR ASR1 ADR1 AOM AOM1 AOR AOR2 ADR2 AORV AOWH SEPTEMBER 2018 HDT 83 WWW TRUCKINGINFO COM
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