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928
Wheels, Tires, Alianment
44
Further to 3: (Fitting the wheel to the vehicle)
Fasten the wheel to the wheel hub as prescribed (also see Page 44 - 9 - General assembly instmc-
tions, tires). Always fit the best wheels on the left.
- Valve must point up or, for 17.inch Cup Design wheels, down (same position as on the balancing
equipment). Observe instructions on page 44 03.
- Bore close to valve is for wheel mounting; fit lockable wheel nut to color-coded wheel stud. On
17.inch wheels, locate the valve opposite the marked stud. Tighten nuts, start tightening equally at
the top. Before lowering the vehicle onto its wheels, tighten wheels to 130 Nm (96 fltb.) to make
sure that its predefined position on the wheel hub does not change anymore.
- Tire pressure according to specification
Further to 4: (Electronic fine balancing)
Use the RAW 04 from Messrs. Schenck ASG or ipk 2 from Messrs. Hofmann for electronic fine bal-
ancing of the wheels on the vehicle. Refer to the equipment's operating instructions for procedure.
- If all wheels are to be finely balanced, begin at the front axle.
4a Fine balancing of the front wheels because of steering-wheel vibrations at approx. 120 km/h
4b Fine balancing of the rear wheels because of vibrations at 180 km/h and greater 230 km/h
- The following
generally applies for front and rear axles: the measurement jacks must stand
on a firm foundation,
must only record at the specified points (measurement flxture situated
as ClOSa to the wheel as possible), doors and hoods must be closed and the vehicle must
not be touched durlng the measurement run. Ensure that the lifting equipment (jack, plat-
form) has no contact wlth the vehicle.
- Attach balance weights to the outside (uniform procedure / may also be distributed
or fitted to the
inside).
Under no circumstances
remove the weights fltted during stationary balancing.
ldentiiy balance weights from electrical fine balancing with a center punch.
a
Wheel balancing
44-13
Printed in Germany - XXXI, 1993
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