Tire-to-Wheel Match-Mounting (Vectoring)
Tire-to-Wheel Match-Mounting (Vectoring)
1. Raise and support the vehicle. Refer to Lifting and Jacking the Vehicle Service and Repair.
2. Remove the tire and wheel assembly from the vehicle. Refer to Tire and Wheel Removal and Installation Service and Repair.
Important:
The wheel must be mounted on the spin-type wheel balancer in accordance with manufacturers instructions.
3. Install the wheel 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.
4. Wrap the circumference of each tire with tape (1) in the center of the tread area.
5. Position a dial indicator fitted with a roller, on the taped portion of the tire tread perpendicular to the surface.
6. Slowly rotate the tire and wheel assembly one complete revolution in order to find the wheel high point.
7. Mark the location of the high point (3) on the tire (4).
8. Place a reference mark (2) on the tire sidewall at the location of the valve stem (5).
* Always refer to the valve stem (5) as the 12 O'clock position.
* Refer to the location of the high point (3) by its clock position on the wheel (1), relative to the valve stem (5).
Important:
Do not dismount the tire from the wheel.
9. Mount the tire and wheel assembly on a tire changing machine and break down the bead.
Important:
lubricate the bead area in order to easily rotate the tire on the wheel.
10. Rotate the tire 180 degrees on the rim so that the valve stem reference mark (3) is now at the 6 O'clock position in relation to the valve stem (1).
11. Inflate the tire and seat the bead, closely inspect each tire for correct and even bead seating.
Important:
The wheel must be mounted on the spin-type wheel balancer in accordance with manufacturers instructions.
12. Install the wheel on a spin-type wheel balancer.
13. Position a dial indicator fitted with a roller, on the taped portion of the tire tread perpendicular to the surface.
14. Slowly rotate the tire and wheel assembly one complete revolution in order to find the wheel high point.
Important:
After remounting a tire to a wheel or after replacing a tire and/or a wheel, remeasure the tire and wheel assembly runout in order to verify that the runout has been reduced and is within tolerance. Ensure that the tire and wheel assembly is balanced before installing to the vehicle.
15. Measure the wheel and tire assembly runout.
16. Mark the new location of the assembly runout high point on the tire.
17. If the assembly runout has been reduced and is within tolerance, no further steps are necessary. Balance the tire and wheel assembly, then install the assembly to the vehicle. Refer to the following:
* Tire and Wheel Assembly Balancing - On-Vehicle Tire and Wheel Assembly Balancing - On-Vehicle Tire and Wheel Assembly Balancing - Off Vehicle Tire and Wheel Assembly Balancing - Off Vehicle.
* Tire and Wheel Removal and Installation Service and Repair.
18. If the clock location of the high point remained at or near the original clock location of the high point (2) and the assembly runout has not been reduced, the wheel is the major contributor to the assembly runout concern. Replace the wheel. Refer to Tire Dismounting and Mounting Removal and Replacement and Replacement Wheels Description Description and Operation.
19. If the clock location of the high point has moved, however the assembly runout has not been reduced, perform the following steps:
1. If the clock location of the high point (2) is now at or near a position 180 degrees from the original clock location of the high point (1), the tire is the major contributor to the assembly runout concern. Replace the tire. Refer to Tire Dismounting and Mounting Removal and Replacement.
2. If the clock location of the high point is now between the original high point position and the opposite extreme, then both the tire and the wheel are contributing to the assembly runout concern. Continue rotating the tire in relation to the wheel and remeasuring the assembly runout until the lowest amount of runout is achieved. If the lowest amount of runout achieved is not within tolerance measure the off vehicle tire and wheel runout, refer to Tire and Wheel Assembly Runout Measurement - On-Vehicle Tire and Wheel Assembly Runout Measurement - On-Vehicle , in order to isolate the tire or wheel as the cause of the runout concern.