33 21... Pressing output shaft out of drive flange and drawing in

WARNING: This page is about a different car, the 2013 BMW 550i GT, 2012 BMW 550i GT, 2011 BMW 550i GT, and 2010 BMW 550i GT. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks

Remove REAR WHEEL.
Remove REAR AXLE FINAL DRIVE.

IMPORTANT: Always place a new circlip on the output shaft reinstalling!

IMPORTANT: Expand anti-twist lock sufficiently to avoid damaging thread when releasing collar nut (1).

Activate parking brake and release collar nut (1).

Tightening torque 33 41 1AZ .

Installation note:

Lightly oil the gearing at the shaft journal.

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

Replace collar nut (1) by positive peening at flat areas of output shaft.

Fig 1: Securing Collar Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Use special tool, see BMW Workshop Catalogue.

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

The following work steps describe pressing out the output shaft:

Fig 2: Pressing Out Output Shaft From Drive Flange Using Tools

Courtesy of BMW OF NORTH AMERICA, INC.

The following tools are required to press out the output shaft from the drive flange, see Fig 2 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
K1	Screws M12 x 1.5
K2	Screws M14 x 1.5
B1	Adapter

Secure output shaft against falling out.
Press out output shaft with hydraulic unit.

The following work steps describe drawing in the output shaft:

Fig 3: Pressing Out Output Shaft Using Hydraulic Unit

Courtesy of BMW OF NORTH AMERICA, INC.

The following tools are required to fit the output shaft in the drive flange, see Fig 3 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 sleeve M24
D1	Washer
F2	Spindle M24 / M20 (length 335 mm)

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

G1	Adapter M22 x 1.5 to M20
G2	Adapter M24 x 1.5 to M20
G3	Adapter M27 x 1.5 to M20

Fig 4: Identifying Output Shaft Adapter

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Risk of damage!

Due to the technical requirements, the special tool used, sleeve G,* is relatively thin-walled. To ensure that the load limit of the tensioning sleeve is not exceeded when drawing in the output shaft, it is essential to use adapter 81 64 2 318 661 in combination with a torque wrench.

Fit adapter with torque wrench to hydraulic unit (see Fig 5).

Set torque wrench to 20 Nm.

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

Tighten collar nut (1), activate parking brake for this purpose.

Tightening torque 33 41 1AZ .

Installation note:

Renew collar nut (1), apply a light coating of oil to collar nut contact surface and tighten.

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

Secure collar nut (1) by positive peening at flat areas of output shaft.

Fig 5: Securing Collar Nut

Courtesy of BMW OF NORTH AMERICA, INC.