- Raise and support the vehicle.
- Closely inspect each tyre for proper and even bead seating.
- If any of the tyre beads were not properly or evenly seated, reseat the tyre bead, then proceed to step 4. Refer to Tyre and Wheel Removal and Installation .
- Wrap the circumference of each tyre with tape (1) in the centre tread area.
Wrapping the tread with tape allows for a smooth and accurate reading of radial runout to be obtained.
- Position the dial indicator on the taped portion of the tyre tread such that the dial indicator is perpendicular to the tyre tread surface.
- Slowly rotate the tyre and wheel assembly one complete revolution in order to find the low spot.
- Set the dial indicator to zero at the low spot.
- Slowly rotate the tyre and wheel assembly one more complete revolution and measure the total amount of radial runout.
Specification
Maximum tyre and wheel assembly radial runout - measured on-vehicle: 1.52 mm (0.060 in)
- Position the dial indicator on a smooth portion of the tyre sidewall, as close to the tread as possible, such that the dial indicator is perpendicular to the tyre sidewall surface.
- Slowly rotate the tyre and wheel assembly one complete revolution in order to find the low spot. Ignore any jumps or dips due to sidewall splices.
- Set the dial indicator to zero at the low spot.
- Slowly rotate the tyre 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.
Specification
Maximum tyre and wheel assembly lateral runout - measured on-vehicle: 1.52 mm (0.060 in)
- Repeat steps 4 through 12 until all of the tyre and wheel assembly radial and lateral runout measurements have been taken.
- Lower the vehicle.
