Tire and Wheel Assembly Runout Measurement - Off Vehicle

Tire and Wheel Assembly Runout Measurement - Off Vehicle

Tire and Wheel Runout Measurement - Off-Vehicle

Danger:
To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

Warning:
Refer to Safety Glasses Warning Safety Glasses Warning.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

2. Mark the location of each tire and wheel assembly in relation to the vehicle.

3. Remove the tire and wheel assemblies from the vehicle. Refer to Tire and Wheel Removal and Installation Service and Repair.

4. Closely inspect each tire for correct and even bead seating.

5. If any of the tire beads were not correctly or evenly seated, reseat the tire bead, then proceed to step 6. Refer to Tire Dismounting and Mounting Removal and Replacement.

Important:
The wheel must be mounted on the spin-type wheel balancer in accordance with manufacturers instructions.

6. Mount a tire and wheel assembly on a spin-type wheel balancer.

Important:
Wrapping the tread with tape allows for a smooth and accurate reading of radial runout to be obtained.

7. Wrap the outer circumference of each tire with tape (1) in the center tread area.

8. Position the dial indicator fitted with a roller, on the taped portion of the tire tread perpendicular to the surface.

9. Slowly rotate the tire and wheel assembly one complete revolution in order to find the low point.

10. Set the dial indicator to zero at the low point.

11. Slowly rotate the tire and wheel assembly one more complete revolution and measure the total amount of radial runout.

Maximum tire and wheel assembly radial runout - measured off-vehicle: 1.27 mm (0.050 in)

12. Position the dial indicator fitted with a roller on a smooth portion of the tire sidewall, perpendicular to the surface, as close as possible to the tread area.

13. Slowly rotate the tire and wheel assembly one complete revolution in order to find the low point. Ignore any jumps or dips due to sidewall splices.

14. Set the dial indicator to zero at the low point.

15. Slowly rotate the tire and wheel assembly one more complete revolution and measure the total amount of lateral runout. Ignore any jumps or dips due to sidewall splices and attain an average runout measurement.

Maximum tire and wheel assembly lateral runout - measured off-vehicle: 1.27 mm (0.050 in)

16. Repeat steps 6 through 15 until all tire and wheel assembly, radial and lateral runout measurements have been taken.

17. If the tire and wheel assembly runout measurements are not within specifications, proceed to step 19.

18. If the tire and wheel assembly runout measurements are within specifications, then the off-vehicle tire and wheel assembly runout is considered acceptable.

Important:
Wheel runout should be measured on both the inboard and outboard rim flanges, unless wheel design will not permit. Ignore any jumps or dips due to paint drips, chips, or welds.

23. Position the dial indicator fitted with a roller perpendicular to the vertical outer surface of the wheel rim flange, with the tire still mounted.

24. Slowly rotate the tire and wheel assembly one complete revolution in order to find the low point.

25. Set the dial indicator to zero at the low point.

26. Slowly rotate the tire and wheel assembly one more complete revolution and measure the total amount of wheel lateral runout.

* Maximum aluminium wheel lateral runout - measured off-vehicle, tire mounted: 0.762 mm (0.030 in)

* Maximum steel wheel lateral runout - measured off-vehicle, tire mounted: 1.143 mm (0.045 in)

27. Repeat steps 19 through 26 until all tire and wheel assembly wheel, radial and lateral runout measurements have been taken.

28. If any of the wheel runout measurements are not within specifications. Refer to Wheel Runout Measurement below.

29. If the wheel runout measurements are within specifications, replace the tire. Refer to Tire Dismounting and Mounting Removal and Replacement.

30. Remeasure the runout of the affected tire and wheel assembly, or assemblies after replacement of any tires.

31. Install the tire and wheel assembly in the original location in relation to the vehicle. Refer to Tire and Wheel Removal and Installation Service and Repair.

32. Remove the safety stands.

33. Lower the vehicle.

Wheel Runout Measurement

Danger:
To avoid any vehicle damage, serious personal injury or death when major components are removed from the vehicle and the vehicle is supported by a hoist, support the vehicle with jack stands at the opposite end from which the components are being removed and strap the vehicle to the hoist.

Warning:
Refer to Safety Glasses Warning Safety Glasses Warning.

1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.

2. Mark the location of each tire and wheel assembly in relation to the vehicle.

3. Remove the tire and wheel assemblies from the vehicle. Refer to Tire and Wheel Removal and Installation Service and Repair.

4. Using a suitable marker indicate on the tire, the orientation of the tire to the wheel valve stem.

5. Remove the tire from the wheel. Refer to Tire Dismounting and Mounting Removal and Replacement.

Important:
The wheel must be mounted on the spin-type wheel balancer in accordance with manufacturers instructions.

6. Install the wheel on a spin-type wheel balancer.

Important:
Measure wheel runout on both the inboard and outboard rim flanges. Ignore any jumps or dips due to paint drips, chips, or welds.

7. Position the dial indicator fitted with a roller perpendicular to the horizontal inner surface of the wheel rim flange.

8. Slowly rotate the wheel one complete revolution in order to find the low point.

9. Set the dial indicator to zero at the low point.

10. Slowly rotate the wheel one more complete revolution and measure the total amount of wheel radial runout.

* Maximum aluminium wheel radial runout - measured off-vehicle, tire dismounted: 0.762 mm (0.030 in)

* Maximum steel wheel radial runout - measured off-vehicle, tire dismounted: 1.015 mm (0.040 in)

Important:
Measure wheel runout on both the inboard and outboard rim flanges. Ignore any jumps or dips due to paint drips, chips, or welds.

11. Position the dial indicator fitted with a roller perpendicular to the vertical inner surface of the wheel rim flange.

12. Slowly rotate the wheel one complete revolution in order to find the low point.

13. Set the dial indicator to zero at the low point.

14. Slowly rotate the wheel one more complete revolution and measure the total amount of wheel lateral runout.

* Maximum aluminium wheel lateral runout - measured off-vehicle, tire dismounted: 0.762 mm (0.030 in)

* Maximum steel wheel lateral runout - measured off-vehicle, tire dismounted: 1.143 mm (0.045 in)

15. Repeat steps 2 through 14 until all tire and wheel assemblies, radial and lateral runout measurements have been taken.

16. If any of the wheel runout measurements are not within specifications, replace the wheel. Refer to Replacement Wheels Description Description and Operation and Tire Dismounting and Mounting Removal and Replacement.

Important:
Always measure the runout of any of the tire and wheel assemblies after mounting the tire.

Important:
If refitting the original tire on the original wheel align the mark on the tire with the valve stem on the wheel.

17. Install the tire to the wheel. Refer to Tire Dismounting and Mounting Removal and Replacement.

18. Install the tire and wheel assembly in the original location in relation to the vehicle. Refer to Tire and Wheel Removal and Installation Service and Repair.

19. Remove the safety stands.

20. Lower the vehicle.