Wheel Bearing In Control Position, Lifting Vehicles With Air Suspension

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Special tools and workshop equipment required

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

NOTE:

All chassis component bolts with bonded rubber bushings must be tightened with the control position.

Bonded rubber bushings have a limited range of motion.

Before axle components with bonded rubber bushings are tightened, they have to be brought to a position which matches the position when the vehicle is being operated (control position).

Otherwise the rubber mounting will be stressed, resulting in a reduced service life.

By raising appropriate suspension using Engine and Gearbox JackVAS6931 and Engine/Gearbox Jack Adapter - Wheel Hub SupportT10149, this position can be simulated on the hoist.

Procedure

-- Place vehicle on hoist, refer to RAISING AND LOWERING WITH OPEN AND CLOSED AIR SUSPENSION SYSTEM .

Front Axle

Engine must be installed.

Rear Axle

Before lifting the suspension, the vehicle must secured to the lifting arms on the hoist -arrow B- using the Tensioning Strap T10038 over the striker pin -arrow A-.

Fig 1: Identifying Tensioning Strap T10038

Courtesy of AUDI OF AMERICA, LLC

-- Place a piece of foam rubber -1- between the sill panel and the Tensioning Strap T10038 and then tension the Tensioning Strap T10038.

NOTE:

Be careful not to scratch the sill panel.

CAUTION:

The vehicle could fall off the hoist if it is not secured.

Continuation for Both Axles

-- Start the program on the Vehicle Diagnostic Tester and bleed the air suspension system for the axle.

-- Remove the wheel, refer to WHEELS AND TIRES .

-- Turn the wheel hub until one of the holes for the wheel bolts is on top.

-- Install Engine/Gearbox Jack Adapter - Wheel Hub Support T10149 with wheel bolt on wheel hub.

Fig 2: Dimension Between Wheel Hub Center And Lower Edge Of Wheel Housing

Courtesy of AUDI OF AMERICA, LLC

-- Install the Engine/Gearbox Jack Adapter - Wheel Hub Support T10149 in the Engine and Gearbox Jack VAS6931.

-- Lift the wheel bearing housing using the Engine and Gearbox Jack VAS6931 until dimension -a- is reached.

Dimension -a- is dependent on standing height of installed suspension:

Chassis ¹⁾	Front axle dimension -a- in mm	Rear axle dimension -a- in mm
Standard suspension (1BK)	410 ± 7	405 ± 7
Heavy duty suspension (1BY)	418 ± 7	413 ± 7
Sport suspension (2MA/2MB)	400 ± 7	395 ± 7

¹⁾ The suspension that the vehicle is equipped with is indicated on the vehicle data plate. The suspension is indicated by a PR number. For the correct PR numbers and assigned suspensions, refer to EXPLANATIONS OF PRODUCTION CONTROL NUMBERS (PR NUMBER) .

Tightening of the respective bolts/nuts must then only occur after dimension -a- between the wheel hub center and the lower edge of wheel housing has been attained.

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

Courtesy of AUDI OF AMERICA, LLC

WARNING:

Do not lift or lower the vehicle when the Engine and Gearbox Jack VAS6931 is below the vehicle.
Do not leave the Engine and Gearbox Jack VAS6931 under the vehicle any longer than necessary.

Working after Adjusting Control Position

-- Tighten the bolts and nuts.

-- Lower the wheel bearing housing.

-- Remove the Engine and Gearbox Jack VAS6931 from under the vehicle.

-- Remove Engine/Gearbox Jack Adapter - Wheel Hub Support T10149.

-- Install the wheel and tighten, refer to WHEELS AND TIRES .

-- Fill the air suspension system on the affected axle, refer to SYSTEM, VENTING OR FILLING .

WARNING:

If vehicle will be driving on the streets, all screws and nuts must be tightened properly!