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Match mounting > < Checking radial and lateral run-out of wheels and tyres with wheel balancing machine centring systemVAS 5271

A4 Cabriolet Mk2

Checking radial and lateral run-out on rim
Checking radial and lateral run-out on rim
–  Clamp rim on balancer.
  Note
t  On rims with bonded wheel trims, take care not to scratch the wheel trims.
t  Wheel trims have a very sensitive surface.
t  If a wheel trim is damaged, the rim must be renewed.
   
t  The wheel trim cannot be renewed.
–  Use workshop equipment wheel balancing machine centring system -VAS 5271-.
–  Preload dial gauge about 2 mm.
–  Slowly rotate rim.
  A44-10265
–  Note the smallest and the largest dial readings.
S - Lateral run-out
H - Radial run-out
–  Compare the measured values with the specifications in the table.
  Note
You can disregard extreme readings on the dial gauge which are due to small irregularities.
Specifications for radial and lateral run-out on wheel
  N44-0231
Steel disc wheelRadial run-outLateral run-out
Steel disc wheel0.5 mm0.5 mm
Aluminium disc wheel0.3 mm0.3 mm

  Note
If the measured value exceeds the specification, acceptable smoothness cannot be attained.
   

Match mounting > < Checking radial and lateral run-out of wheels and tyres with wheel balancing machine centring systemVAS 5271