Road Test, Performing
– Perform a road test after balancing wheel/tire.
If a vibration is still detected during the road test, the cause may
be due to tolerance in the wheel centering.
The component tolerances of wheels and wheel hubs can be ad‐
ditive in unfavorable cases. Vibration can result from this. This
can be eliminated using a finish balancer. Refer to
⇒ “12.6 Finish Balancer ”, page 284 .
12.5 Hunter RFT33VAG Road Force
Touch™ Wheel Balancer - VAS6230B4-
Expanded functions can be performed using Hunter RFT33VAG
Road Force Touch™ Wheel Balancer - VAS6230B4- in addition
to the previously known balancers.
A special characteristic of this system is testing the radial force of
wheel/tire during rolling.
For this purpose, a roller presses a force of approximately 635 kg
(1400 lbs) against the wheel. This simulates the tire contact force
against the street surface while driving.
Tire contact forces fluctuate due to radial- and lateral run-out and
differing rigidity in the tires.
The Hunter RFT33VAG Road Force Touch™ Wheel Balancer -
VAS6230B4- detects and stores the position of the maximum
measured radial force in the tires. After that, the position of small‐
est dimension between rim flange and disc wheel center is meas‐
ured.
12.6 Finish Balancer
Note
♦
Working with a Finish Balancer requires instruction from the
manufacturer of the balancer.
♦
For the balancing, the wheels of the tractive axle are set upon
the turntable sensors, for example, front wheels for Front
Wheel Drive (FWD) and all 4 wheels for All Wheel Drive
(AWD).
If it is determined when balancing on the vehicle the remaining
imbalance is more than 20 grams, the wheel should be rotated on
the wheel hub.
– Mark the point at which the imbalance is indicated.
– Afterwards, unbolt the wheel and rotate its position on the
wheel hub so that the marking points downward.
Note
The wheel hub must not turn during this procedure.
– First, tighten the lowest wheel bolt by hand to approximately
30 Nm.
Jetta 2011 ➤ , Jetta 2013 ➤
Suspension, Wheels, Steering - Edition 08.2015
284 Rep. Gr.44 - Wheels, Tires, Wheel Alignment
ProCarManuals.com
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