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

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NOTE:

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 Engine and Gearbox Jack:VAS 6931 and Support Device:VAS 6931/1 , this position can be simulated on the hoist.

Special tools and workshop equipment required

Engine and Gearbox Jack:VAS 6931

Fig 1: Engine and Gearbox Jack VAS6931 or VAG1383A
Courtesy of AUDI
Support Device:VAS 6931/1 , not illustrated
Tensioning Strap:T10038

Fig 2: Identifying Tensioning Strap T10038
Courtesy of AUDI

Procedure

-- Determine the 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.

WARNING:

Risk of accident due to the vehicle sliding off the hoist.

When lifting the vehicle on the hoist, the spring force of the air suspension remains in full effect. To bring the wheel bearing to the standard vehicle height, the spring force of the air suspension must be completely removed by bleeding the system.

Before the respective suspension is lifted, the vehicle must be tied down to the hoist lifting arms with the Tensioning Strap:T10038 .
When lifting the vehicle on the hoist, the spring force of the air suspension remains in full effect. To bring the wheel bearing to the standard vehicle height, the spring force of the air suspension must be completely removed by bleeding the system.

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

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

-- Install the Support Device:VAS 6931/1 -A- to the brake rotor -1- using two wheel bolts -2-.

Courtesy of AUDI

-- Position the Engine and Gearbox Jack:VAS 6931 -B- on the support device.

-- Lift the wheel bearing housing, until the dimension -a- has been reached.

Fig 3: Determining Height Dimension -a-

Courtesy of AUDI

WARNING:

Risk of accident!

Do not lift or lower the vehicle when the Engine and Gearbox Jack is under the vehicle.
Do not 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 Engine and Gearbox Jack:VAS 6931 to the side.

NOTE:

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

Before filling the air spring, check the installation position. Refer to Fig 4.

Fig 4: Air Spring Installed Position

Courtesy of AUDI