Wheel Bearing At Standard Vehicle Height, Lifting Vehicles With Air Suspension

Special tools and workshop equipment required

Tensioning Strap:T10038
Engine/Gearbox Jack Adapter - Wheel Hub Support:T10149
Engine and Gearbox Jack:VAS6931

All chassis component bolts with bonded rubber bushings must be tightened at standard vehicle height. Refer to STANDARD VEHICLE HEIGHT FOR AXLE ALIGNMENT ON VEHICLES WITH AIR SUSPENSION, CHECKING .

Bonded rubber bushings have a limited range of rotation. Axle components with bonded rubber bushings must be brought into the position they will be in when driving before they are tightened (standard vehicle height).
Otherwise, the bonded rubber bushing will have tension, which will reduce the service life.
By raising the corresponding suspension using the :VAS6931 and :T10149 , this position can be simulated on the hoist.

Procedure

Fig 1: Determining Height Dimension -a-

Courtesy of AUDI OF AMERICA, LLC

-- Before starting the procedure, determine the measurement -a-, or example using a tape measure, from the center of the wheel to the lower edge of the fender/wheel housing.

The measurement must take place at standard vehicle height. Refer to STANDARD VEHICLE HEIGHT FOR AXLE ALIGNMENT ON VEHICLES WITH AIR SUSPENSION, CHECKING .

-- Note the measurement. This will be needed when tightening the bolts/nuts.

CAUTION:

There is a risk of accident from the spring force of the air suspension if the vehicle slides off the hoist.

When lifting the vehicle on the hoist, the spring force of the air suspension remains in full effect.

- Before raising the wheel bearing at standard vehicle height, reduce the spring force of the air suspension by completely bleeding the system.

Before the respective suspension is lifted, the vehicle must be tied down to the hoist lifting arms with the :T10038 .

-- Bleed the air suspension system. Refer to AIR SUSPENSION SYSTEM, FILLING AND BLEEDING .

Fig 2: Installing T10149

Courtesy of AUDI OF AMERICA, LLC

-- Remove the wheel. Refer to WHEELS AND TIRES .

-- Turn the wheel hub, until a wheel bolt hole is at the top.

-- Install the :T10149 with a wheel bolt -2- on the wheel hub.

Tightening of the applicable bolts/nuts must only occur if the dimension between the center of the wheel hub and the lower edge of the fender/wheel housing that was measured before starting the procedure has been attained.

-- Insert the :T10149 in the :VAS6931 and lift the wheel bearing housing until the dimension -a- is reached.

Fig 3: Dimension Between Wheel Hub Center & Lower Edge Of Wheel Housing

Courtesy of AUDI OF AMERICA, LLC

CAUTION:

There is a risk of an accident when lowering or lifting the vehicle when the engine and gearbox jack is underneath it.

- Never lift or lower the vehicle when the engine and gearbox jack is underneath it.

- Never leave the engine and gearbox jack under the vehicle any longer than necessary.

-- Tighten the applicable bolts and nuts.

-- Lower the wheel bearing housing.

-- Move the :VAS6931 to the side

-- Remove the :T10149 .

-- Fill the air suspension system. Refer to AIR SUSPENSION SYSTEM, FILLING AND BLEEDING .

The vehicle may be removed from the vehicle hoist only after the air springs have been filled again.