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Radial and lateral palpation of wheels and tires
Radial and lateral runout occurs because of disk rotation and inaccurate tire. 100 percent accuracy of rotation is not possible due to technical features. Therefore, a manufacturer of these components enables a clearly defined tolerance. If the disc is mounted and the tire at a disadvantage, it may cause exceeding the maximum allowable tolerance drive bus. Table 4.3 shows the maximum tolerances for disk installed tire. Check of radial and lateral palpation of a disk with the tire by using a dial gauge for tires VAG 1435
Check lateral runout Pre-tighten the dial gauge for tires about 2 mm.
Place the indicator to the sidewall of the tire (Fig. 4.15). Slowly roll the wheel. Record the minimum and maximum deflection.
NOTE If the difference is greater than 1.3 mm, the lateral runout is considered to be exceeded. In this case, it can be reduced by minimization. Deflection indicator because of the small irregularities on the tires should not be taken into account. |
Checking the radial runout
Pre-tighten the dial gauge for tires about 2 mm (Fig. 4.16). Place the indicator to the tread of the tire. Slowly roll the wheel. Record the minimum and maximum deflection.
NOTE If the difference is greater than 1 mm, the radial runout is considered to be exceeded. In this case, it can be reduced by minimizing |
Checking the radial and lateral runout
| Fig. 4.17. The scheme of check radial and lateral palpation
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Place the wheel on the balancing machine. Use samorazzhimayuschiysya collet adapter for balancing stands VAS 5271. Pre-tighten the dial gauge for tires about 2 mm. Slowly roll the wheel. Record the minimum and maximum deflection. S - Lateral runout. H - Radial run. Compare the value obtained with the nominal parameters in Table 4.4.
NOTE Deflection indicator because of the small irregularities on the tires should not be taken into account. |
NOTE If the measured value exceeds the standard, the normal ride will not be achieved. |
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