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Checking radial and lateral run-out on rim > < Checking radial and lateral run-out of wheels and tyres on V.A.G 1435

A4 Mk3

Checking radial and lateral run-out of wheels and tyres with wheel balancing machine centring systemVAS 5271
Checking radial and lateral run-out of wheels and tyres with wheel balancing machine centring system -VAS 5271-
Checking lateral run-out:
–  Clamp wheel 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 wheel balancing machine centring system -VAS 5271-.
–  Preload dial gauge about 2 mm.
–  Apply dial gauge to sidewall of the tyre as shown in illustration.
–  Slowly rotate the wheel.
  A44-10265
–  Note the smallest and the largest dial readings.
  Note
If the difference is greater than 1.3 mm, the lateral run-out is too great.
In this case, you can reduce lateral run-out by match mounting the tyre → Chapter.
You can disregard extreme readings on the dial gauge which are due to small irregularities in the rubber.
Checking radial run-out:
–  Preload dial gauge about 2 mm.
–  Apply dial gauge to running surface of the tyre as shown in illustration.
–  Slowly rotate the wheel.
  N44-0232
–  Note the smallest and the largest dial readings.
  Note
If the difference is greater than 1 mm, the radial run-out is too great.
In this case, you can reduce radial run-out by match mounting the tyre.
  Note
If the measured value exceeds the specification, acceptable smoothness cannot be attained.
  N44-0233

Checking radial and lateral run-out on rim > < Checking radial and lateral run-out of wheels and tyres on V.A.G 1435