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

WARNING: This page is about a different variant/trim than selected.

Necessary preliminary tasks:

Remove FRONT WHEEL

IMPORTANT: Expand turning lock sufficiently to avoid damaging thread when releasing collar nut.

Press brake pedal.

Unfasten collar nut (1).

Installation note:

Replace collar nut (1).

Fig 1: Identifying Collar Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Remove BRAKE DISC .

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

IMPORTANT: To avoid damaging the anti-roll bar link, remove BOTH ANTI-ROLL BAR LINKS FROM ANTI-ROLL BAR

Remove TIE ROD END FROM SWIVEL BEARING .

Remove WHEEL CONTROL JOINT FROM SWIVEL BEARING .

Use special tools (see BMW Workshop Catalogue).

Hydraulic unit - BMW part number 81 64 2 155 744
Adapter kit 1 - BMW part number 81 64 2 155 745
Adapter kit 2 - BMW part number 81 64 2 155 746
Adapter - BMW part number 81 64 2 318 661

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

The following tools are required to press out the output shaft from the drive flange, see Fig 2 for arrangement:

Necessary components:

1	Hydraulic unit
E3	Washer M24
F3	Spindle M24 (length 270 mm)
B2	Adapter
K2	Screws M14 x 1.5

Fig 2: Identifying Necessary Components

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Removing Output Shaft From Wheel Bearing

Courtesy of BMW OF NORTH AMERICA, INC.

Detach brake hose from holder.

Fig 4: Identifying Brake Hose With Holder

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Tightening to torque must be effected by means of the screw!

Fig 5: Identifying Swivel Bearing Nut And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Support swivel bearing with workshop jack.

Slacken nut (2).

Tightening torque: 100 Nm

Pull out screw (1) towards rear and remove swivel bearing.

Installation note:

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

Note insertion direction of screw.

Replace self-locking nuts.

Replacement:

Modify WHEEL BEARING
Modify BRAKE SUPPORT/GUARD PLATE

The following work steps describe drawing in the output shaft:

The following tools are required to press out the output shaft from the drive flange, see Fig 6 for arrangement:

Necessary components:

1	Hydraulic unit
E3	Holding sleeve M24
D1	Washer
F2	Spindle M24 / M20 (length 335 mm)
G4	Adapter M22 x 1.5 to M20

Fig 6: Identifying Necessary Components

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Risk of damage!

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.

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.

Fig 7: Fitting Adapter And Torque Wrench To Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

Apply a light coating of oil to contact surface of collar nut / wheel bearing, and apply tightening force.

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

Tighten new collar nut (1).

For this purpose, press the brake pedal.

Tightening torque: 182 Nm

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

Installation note:

Replace collar nut (1).

Fig 8: Identifying Collar Nut

Courtesy of BMW OF NORTH AMERICA, INC.

After Installation note:

Replacement only: Perform wheel/chassis alignment.
See ALIGNMENT CHECK WITH LOAD UP TO DESIGN POSITION or ALIGNMENT CHECK WITH RIDE-HEIGHT MEASUREMENT WITHOUT LOAD .