Wheel/Tire Balancing Procedure
Wheels with a sensitive surface, glued-on wheel trim, refer to WHEELS WITH A SENSITIVE SURFACE, GLUED-ON WHEEL TRIM .
The balance weights must be glued on so that rub against the brake caliper or the suspension.
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.
-- Let the wheel and tire rotate on the wheel balancer.
-- Check the run of the characteristic lines on the sidewall of the tire in the area of the rim flange.
-- Check the tire wear pattern while the wheel and tire are rotating.
In the event of one-sided wear, flat spots from braking or severe wear spots, smooth running cannot be achieved by balancing. In this case, the tire must be replaced.
-- Check the run-out of the wheel and tire. If the wheel with tire runs untrue although there are no flat spots, a radial or lateral run-out may be the cause.
-- Check wheel with tire for radial and lateral run-out, radial run-out (RR) and lateral runout (LR)!
-- 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. Tires, matching, refer to MATCHING .
The display in the balancing machine should show 0 grams.
-- Bolt the wheel to the vehicle.
If brake pads are ceramics, wheel must not fall on brake disc, otherwise it will be irreparably damaged. To remove/install wheel, install long assembly pin instead of wheel bolts in top position (12:00 position) and short assembly pin in wheel bolt mounts for support. In this way, the wheel can glide on the assembly aids when removing/installing.
-- First tighten the bottom wheel bolt by hand to approximately 30 Nm.
-- Now tighten the remaining wheel bolts diagonally also to about 30 Nm. This process centers the wheel on the wheel hub.
-- Put the vehicle on its wheels.
-- Now use a torque wrench to tighten the wheel bolts diagonally to the specified tightening specification.
Refer to WHEEL BOLT TIGHTENING SPECIFICATIONS .
-- Carry out 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 finish balancer.