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Lateral runout of more than 2.0 mm (.080 inch) measured near the shoulder of the tire may cause the Sometimes radial runout can be reduced. Relocate the wheel and tire assembly on the mounting studs METHOD 1 (RELOCATE WHEEL ON HUB) (1) Drive vehicle a short distance to eliminate tire flat spotting from a parked position. (2) Check wheel bearings and adjust if adjustable or replace if necessary. (3) Check the wheel mounting surface. over from the original position. (5) Tighten wheel nuts until all are properly torqued, to eliminate brake distortion. (6) Check radial runout. If still excessive, mark tire sidewall, wheel, and stud at point of maximum METHOD 2 (RELOCATE TIRE ON WHEEL) NOTE: Rotating the tire on wheel is particularly (1) Remove tire from wheel and mount wheel on service dynamic balance machine. (2) Check wheel radial runout (Fig. 3) and lateral runout (Fig. 4). • STEEL WHEELS: Radial runout 0.040 in., Lat- eral runout 0.045 in. (maximum) • ALUMINUM WHEELS: Radial runout 0.030 in., Lateral runout 0.035 in. (maximum) (3) If point of greatest wheel lateral runout is near original chalk mark, remount tire 180 degrees. Fig. 2 Checking Tire/Wheel/Hub Runout 1 – RADIAL RUNOUT Fig. 3 Radial Runout 1 – MOUNTING CONE Fig. 4 Lateral Runout 1 – MOUNTING CONE 22 - 8 TIRES AND WHEELS WJ DIAGNOSIS AND TESTING (Continued) |