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:
Detecting leaks
External damage can cause leaks in the refrigerant circuit. Because a small
leak will involve only small quantities of refrigerant, leaks should be checked
for using an electronic leak detector or by introducing a leak detection
additive to the refrigerant circuit. Electronic leak detectors ca ...
Radiator fan control unit -J293
Note
Available in various designs, sometimes separately.
This control unit switches the magnetic clutch and thus the
air conditioner compressor on and off. It controls the radiator
fan, an ...
Removing and installing engine control unit -J623- (with protective housing)
Special tools and workshop equipment
required
Hot air blower -VAS 1978/14A--item 1-
with nozzle -2- from wiring harness
repair set -VAS 1978 B-
Small grinder (com ...
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Balancing wheel, balancing wheel with finish balancer
Checking radial and lateral runout of wheels and tyres, tolerances