| Conducting a road test before balancing wheels |
| If a customer brings a vehicle to the workshop complaining about »vibration«, a road test is essential prior to balancing the wheels. |
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| This will give you information about the nature of the rough running. |
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| You will be able to determine in which speed range the rough running occurs. |
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| Raise the vehicle on a lifting platform immediately after the road test. |
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| Mark the positions of the tyres on the vehicle: |
Note | Mark front left tyre »FL«, front right tyre »FR«, rear left tyre »RL« and rear right tyre »RR«. |
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| Remove the wheels from the vehicle. |
Caution | On vehicles with ceramic brakes the wheel must not be allowed to drop onto the brake disc. This would cause irreparable damage to the disc. When removing or fitting a wheel, screw the long assembly pin into the top wheel bolt hole (12 o'clock position) in place of the wheel bolt, and screw the short pin into one of the other holes to support the wheel. The wheel can then slide along the assembly pins when fitting or removing it. |
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