31 21 180 Replacing bearings (wheel hub) for front wheel

WARNING: This page is about a different car, the 2016 MINI Cooper Paceman, 2015 MINI Cooper Paceman, 2014 MINI Cooper Paceman, and 2013 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary work:

Remove FRONT WHEEL .

IMPORTANT: Expand anti-twist lock (2) sufficiently to avoid damaging thread when releasing collar nut.

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

Release screws (1).

Tightening torque 31 21 1AZ .

Installation note:

Replace screws (1).

Fig 2: Identifying Screws

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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 procedure for pulling the wheel bearing/wheel hub off the output shaft:

Fig 3: Pressing Out Output Shaft From Drive Flange

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The following tools are required to pull the wheel bearing/wheel hub off the output shaft; see illustration for arrangement:

Vehicle components:

I	Drive flange hub
II	Wheel carrier/swivel bearing

Required components for all models and types:

1	Hydraulic unit
E3	Washer M24
F3	Spindle M24 (length 270 mm)
C1	Holding sleeve
K2	Screws M14 x 1.5
B1	Adapter

IMPORTANT: Secure wheel bearing with flange-mounted special tool to prevent it from falling.

Pull wheel bearing off the drive shaft using the hydraulic tool.

Installation note:

Keep contact surface (2) of wheel bearing and swivel bearing clean and free from grease.

Fig 4: Identifying Contact Surface Of Wheel And Swivel Bearing

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The following operations describe the procedure for pulling the wheel bearing/wheel hub onto the output shaft:

Fig 5: Fitting Output Shaft In Drive Flange

Courtesy of BMW OF NORTH AMERICA, INC.

The following tools are required to pull the wheel bearing/wheel hub onto the output shaft; see illustration for arrangement:

Vehicle components:

I	Drive flange hub
II	Wheel carrier/swivel bearing
III	Output shaft

Required components for all models and types:

1	Hydraulic unit
E1	Holding sleeveM24
D1	Washer
F2	Spindle M24/M20 (length 335 mm)

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

G4	Adapter M22 x 1.5 to M20

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.

Fig 6: Fitting Adapter With Torque Wrench To Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

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

Set torque wrench to 20 Nm.

Pull wheel bearing/wheel hub with hydraulic tool onto output shaft until the torque wrench is triggered.