31 21 090 Removing and installing/replacing left or right swivel bearing

Necessary preliminary work: 

• Remove FRONT WHEEL .

Release collar nut (1), press brake pedal to floor for this purpose.

Tightening torque 31 60 2AZ .

Installation note: 

Fig 1: Identifying Collar Nut

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Replace collar nut, oil collar nut/wheel bearing contact surface only and tighten down.

No oil permitted on thread of shaft journal or collar nut.

Secure collar nut on flattened area (2) of output shaft by positive caulking.

Remove BRAKE DISC .

Remove PULSE GENERATOR FROM SWIVEL BEARING and expose line up to engine support.

Remove TRACK ROD END FROM SWIVEL BEARING .

Remove WISHBONE FROM WHEEL CONTROL JOINT .

Use special tools (available via BMW/MINI):

• Hydraulic unit - 81 64 2 155 744
• Adapter kit 1 - 81 64 2 155 745
• Adapter kit 2 - 81 64 2 155 746
• Adapter - 81 64 2 318 661

The following operations describe the way in which the output shaft is pressed out of the drive flange. 

Fig 2: Pressing Out Output Shaft From Drive Flange

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The following tools are required to press out the output shaft from the drive flange, see illustration for arrangement:

Vehicle components: 

Required components for all models and types: 

Press swivel bearing (1) outwards and remove output shaft (2) from wheel bearing.

Fig 3: Removing Output Shaft From Wheel Bearing

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Detach brake hose from holder.

Fig 4: Identifying Brake Hose And Holder

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Support swivel bearing with workshop jack.

Slacken nut (2).

Tightening torque 31 31 3AZ .

Pull out screw (1) and remove swivel bearing by pulling downward.

Installation note: 

Keep swivel bearing to spring strut connection clean and free from oil and grease.

Bolt head points in direction of travel.

Replace screw and nut.

Fig 5: Identifying Swivel Bearing Nut And Screw

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Replacement: 

• Modify WHEEL BEARING 
• Modify BRAKE ANCHOR PLATE/PROTECTIVE PLATE .
• Modify GUIDE JOINT .

The following work steps describe drawing in the output shaft: 

Fig 6: Fitting Output Shaft In Drive Flange

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The following tools are required to fit the output shaft in the drive flange, see illustration for arrangement:

Vehicle components: 

Required components for all models and types: 

Components specific to model and type (thread diameter, output shaft): 

The G4 special tool sleeve used has relatively thin walls due to its technical requirements. So that the load limits of the clamping sleeve are not exceeded when pulling in the output shaft, the adapter 81 64 2 318 661 must be used together with a torque wrench.

Fig 7: Fitting Adapter With Torque Wrench To Hydraulic Unit

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Fit adapter with torque wrench to hydraulic unit (see illustration).

Set torque wrench to 20 Nm.

Draw in output shaft with hydraulic tool until the torque wrench is activated.

After installation: 

• Replacement only: perform wheel alignment. See ALIGNMENT CHECK WITH VEHICLE LOAD UP TO DESIGN POSITION or ALIGNMENT CHECK WITH RIDE HEIGHT MEASUREMENT (WITHOUT VEHICLE LOAD) .