| Balancing on a static wheel balancer |
| Attaching the wheel onto the wheel balancer |
Note | When balancing tyres, please remember that cleanliness is absolutely essential, as is the case in any other repair work you carry out. Only then can you attain a flawless result! |
| Dirt and rust in the contact areas and the centre opening of the wheel may distort the results. |
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| Clean the contact surfaces, the centre of the wheel and the recess on the inside of the wheel before mounting the wheel on the wheel balancer. |
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| Fasten the whole wheel on the balancer. |
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| Use a centring system for stationary balancing machines to fasten the rim. |
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| This ensures that the wheel is 100% centred and that the wheel will be clamped without damage! |
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| The wheel cannot be centralised 100% with conical clamping elements on the wheel balancing machine. |
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| A centring arrow of 0.1 mm corresponds to an imbalance of 10 g. |
| Procedure for balancing the wheel rim / tyre |
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| Turn the wheel or tyre on the balancer. |
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| Check that the indicator lines on the sidewalls of the tyre near the wheel rim flange run evenly. |
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| Check the tyre tread while turning the wheel. |
Note | If one-sided wear, flat spots from braking or severe erosion is apparent, balancing will not be able to achieve smooth running. In this case, the tyre must be renewed. |
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| Check the concentricity of the wheel / tyre. If not all the wheel turns in a concentric manner, and if no flattening has been detected, there may be radial or axial run-out. |
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| Check the radial and axial run-out of the wheel → Chapter. |
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| If the radial and axial run-out do not exceed the permitted tolerance levels, balance the wheel and the tyre. |
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| Do not attach counterweights of over 60 g to the wheels. |
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| If a larger weight is required, you can possibly achieve smoother running by "matching" the tyre and rim. Matching tyres → Chapter. |
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| The display on the balancing equipment should read 0 grammes. |
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| As an alternative to match mounting, you could use the vibration control system -VAS 6230- → Chapter. |
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| Bolt wheel onto vehicle. |
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| Tighten all lower wheel lug bolts by hand to approx. 30 Nm. |
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| Then tighten the remaining wheel bolts to about 30 Nm (in diagonal sequence). This process centres the wheel on the hub. |
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| Lower vehicle onto its wheels. |
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| Now use the torque wrench to firmly tighten the wheel bolts diagonally to the prescribed torque. |
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| After balancing the wheels and tyres, carry out a road test. |
| If any imbalance is detected during the test drive, this may be due to tolerances in the centre of the wheel. |
| In unfavourable circumstances, the tolerances of the wheel components and the wheel hubs may be added together, this can also cause imbalance while driving. These can be removed with a finish balancer → Chapter. |
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