Tire and Wheel Assembly Balancer Calibration Test
WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2011 GMC Yukon XL, 2011 GMC Yukon, 2011 Chevrolet Tahoe, 2011 Chevrolet Suburban, and 2011 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
If the balancer fails any of the steps in this calibration test, the balancer should be calibrated according to the manufacturer's instructions. If the balancer cannot be calibrated, contact the manufacturer for assistance.
Inspect the calibration of the tire and wheel assembly balancer according to the manufacturer's recommendations, or perform the following test.
- Spin the balancer without a wheel or any of the adapters on the shaft.
- Inspect the balancer readings.
Specification
Zero within 7 g (1/4 oz.)
- If the balancer is within the specification range, balance a tire and wheel assembly - that is within radial and lateral runout tolerances - to ZERO, using the same balancer.
- After the tire and wheel assembly has been balanced, add an 85 g (3 oz.) test weight to the wheel at any location.
- Spin the tire and wheel assembly again. Note the readings.
- In the static and dynamic modes, the balancer should call for 85 g (3 oz.) of weight, 180 degrees opposite the test weight.
- In the dynamic mode, the weight should be called for on the flange of the wheel opposite the test weight.
- With the assembly imbalanced to 85 g (3 oz.), cycle the balancer 5 times.
- Inspect the balancer readings:
Specification
Maximum variation: 7 g (1/4 oz.)
- Index the tire and wheel assembly on the balancer shaft, 90 degrees from the previous location.
- Cycle the balancer with the assembly at the new location.
- Inspect the balancer readings:
Specification
Maximum variation: 7 g (1/4 oz.)
- Repeat steps 8 through 10 until the tire and wheel assembly has been cycled and checked at each of the 4 locations on the balancer shaft.