Volkswagen Golf Service & Repair Manual: Vibration control system
| Using the vibration control system -VAS 6230 A- you can
perform more functions than just stationary balancing. |
| A special feature of this system is the testing of the
radial force of the wheel and tyre while rolling. |
| A roller presses against the wheel with a force of about 635
kg. This simulates the vertical tyre force against the road
surface during travel. |
| Radial and lateral run-out in the wheel and tyre and
differences in the stiffness of the tyre cause the vertical
force of the wheel to vary. |
| The -VAS 6230 A- detects and stores the position of the
maximum measured radial force in the tyre. Then the position of
the smallest distance between the wheel rim flange and the
centre of the rim is measured. |
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Note
Before working with a finish balancer, the mechanic needs to
have been instructed by the manufacturer of the balancer.
...
Radial and lateral run-out occur when the wheel and tyre do
not run absolutely true.
For technical reasons, 100% true running is not possible.
...
Other materials:
Work instructions
Unbolt relevant brake line at brake caliper or wheel brake
cylinder; catch escaping brake fluid and dispose of this as per
regulations.
–
Cut through brake line at a suitable point (straigh ...
Undulations
Radial depressions are slight concavities in the tyre
sidewall.
They run from the bead towards the shoulder of the tyre.
These parts appear in the figure
→ Fig..
The cause is the accumulation of material ...
Removing and installing valve, rubber valve
Ensure that the wheel rim is clean.
–
Insert new tyre valve with -VAS 6459--1-.
–
Unscrew and remove valve insert.
–
Infl ...
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Balancing wheel, balancing wheel with finish balancer
Checking radial and lateral runout of wheels and tyres, tolerances