Seat Leon 2013 Workshop Manual page 321

If any imbalance is detected during the test drive, this may be due
to tolerances in the centre of the wheel.
In unfavourable circumstances, the tolerances of the wheel com‐
ponents and the wheel hubs may be added together, this can also
cause imbalance while driving. This can be alleviated using a fin‐
ish balancer. ⇒ page 316
2.3.3 Balancing wheel, balancing wheel with
finish balancer
Note
Before working with a finish balancer , the mechanic needs to
♦
have been instructed by the manufacturer of the balancer.
To balance the wheels, set the wheels of the driven axle on
♦
the sensor platforms. On front-wheel drive models, front
wheels must be set. On four-wheel drive models, all 4 wheels
must be set.
If a residual imbalance of over 20 grammes is detected during the
balancing procedure, the wheel should be turned on the wheel
hub.
– Mark the point at which the imbalance is indicated.
– Then, unbolt the wheel and rotate its position on the hub so
that the marking points downwards.
Note
The wheel hub should not rotate during this process.
– First, hand-tighten the lowest wheel bolt to about 30 Nm.
– Then, tighten the remaining wheel bolts diagonally to about 30
Nm. This process centres the correctly wheel on the hub.
– Check whether the imbalance is less than 20 grams using the
finish balancer.
Note
The counterweight should only be modified if the imbalance is
under 20 grammes.
– Loosen the wheel bolts again if necessary.
– Rotate wheel again by 1 or 2 wheel bolt holes in relation to
wheel hub.
– Tighten wheels using the method described above.
Note
Do not try to reduce the imbalance using balancing weights un‐
less the imbalance is less than 20 grams.
– Balance wheels if imbalance is less than 5 grams.
– Tighten wheel bolts to specified torque if you have not already
done so.
León 2013 ➤ , León ST 2013 ➤
Running gear, axles, steering - Edition 06.2018
2. Rough running due to wheels/tyres - causes and rectification
315