Wheel, Balancing On Stationary Balancing Machine
Tension the wheel on balancing machine
Be careful not to scratch off the glued- on wheel trim on these rims.
The surface of the wheel trim is very sensitive.
The rim will have be replaced if the wheel trim is damaged.
The wheel trim cannot be replaced.
Dirt and rust in the area of the contact surfaces and centering of the wheel distort the result.
-- Clean the contact surfaces, centering seat and wheel disc using the :VAS6446 before tensioning wheel on balancing machine! Refer to the appropriate service Information.
The wheel balancing machine must use the correct system for centering and tensioning the tires when replacing them. Reference the information for the Wheel Balancing Machine Centering System before beginning any work. Refer to service information .
-- Tension the wheel with the tire on the balancing machine.
To mount the wheel on the wheel balancer, use for example :VAS5271 .
This way a 100% centering of the wheel and gentle tensioning is possible!
It is not possible to center it 100% on balancing machine with conical tensioners.
With a deviation of 0.1 mm outside the center, there is an imbalance of 10 grams on the wheel/tire.
Wheel/tire balancing procedure
-- Let the wheel/tire turn on the balancing machine.
-- Check the run of the characteristic curves on the sidewall of the tire in the area of the rim flange.
-- Check the tire wear pattern while the wheel/tire is turning.
In the event of one-sided wear, wear spots from braking or severe flattening, smooth running cannot be achieved by balancing. In this case, the tire must be replaced.
-- Check the run-out on the wheel/tire. If the wheel with tire runs untrue, although there are no flat spots, a radial run-out or lateral run-out may be the cause.
-- Check the wheel with tire for radial and lateral run-out. Refer to TIRE AND WHEEL RADIAL AND LATERAL RUN-OUT, CHECKING .
-- If the radial and lateral run-out are within the specified tolerance, balance the wheel and tire.
Do not use more than 60 grams of weight per wheel.
If more weight is necessary, a smoother running can achieved by matched mounting of the tire. Matching a tire. Refer to TIRES AND RIMS, MATCHING .
The display in the balancing machine should show 0 grams.
:VAS6230B4 can be inserted as an alternative to matching. Refer to Hunter RFT33VAG Road Force Touch™ Wheel Balancer .
-- Install the wheel on the vehicle.
Ceramic brake destruction due to removal/installation of the wheel.
- To remove/mount a wheel, install the long drift instead of the wheel bolts at the topmost position (12 o'clock position) and insert the short drift in the wheel bolt mounts for support.
-- Tighten the lowest wheel bolt by hand to approximately 30 Nm.
-- Tighten the remaining wheel bolts diagonally to approximately 30 Nm. This process centers the wheel on the wheel hub.
-- Set the vehicle on its wheels.
-- Use a torque wrench to tighten the wheel bolts diagonally to the specified tightening specification.
-- Perform a road test.
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 additive in unfavorable cases. Vibration can result from this. This can be eliminated using a fine balancing machine.
Refer to WHEEL, BALANCING WITH FINE BALANCING MACHINE (FINISH BALANCER)