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TIRE AND WHEEL RUNOUT/MATCH MOUNTING 1. System Radial Runout. This on-the-vehicle sys- tem check will measure the radial runout including a. Raise vehicle so tires clear floor. (Refer to LUBRICATION & MAINTENANCE/HOISTING - b. Apply masking tape around the circumference of the tire in the locations to be measured (1). c. Check system runout using Dial Indicator Set, Special Tool C-3339A with 25-W wheel, or • Tread 9 dips 9 ; Rapid decrease then increase in dial indicator reading over 101.6 mm (4.0 inch) of tread circum- ference. • Tread 9 steps 9 ; Rapid decrease or increase in dial indicator reading over 101.6 mm (4.0 inch) of tread circum- ference. d. If system runout is excessive, re-index the tire and wheel assembly on the hub. Remove assembly from vehicle and install it back on the hub two studs over from original mounting position. If re-indexing the tire e. If system runout is still excessive, continue with this diagnosis and testing procedure. 2. Tire and Wheel Assembly Radial Runout. This radial runout check is performed with the tire and wheel assem- bly off the vehicle. a. Remove tire and wheel assembly from vehicle and install it on a suitable wheel balancer. b. Check system runout using Dial Indicator Set, Special Tool C-3339A with 25-W wheel, or equivalent. Place the end of the indicator against each taped 22 - 4 TIRES/WHEELS LX |