BMW 7 Series: Output Shafts

PRESSING OUTPUT SHAFT OUT OF DRIVE FLANGE AND DRAWING IN

Necessary preliminary work

• 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 gearing on shaft journal.

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

Renew collar nut (1) and secure by positive peening at flat areas of output shaft.

Fig. 69: Identifying Collar Nut

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. 70: Pressing Output Shaft From Drive Flange Using Special Tools

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

Vehicle components

VEHICLE COMPONENTS

I  Drive flange hub
II Wheel carrier/swivel bearing

Required components for all models and types

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. 71: Installing Output Shaft From Drive Flange Using Special Tools

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

Vehicle components

VEHICLE COMPONENTS

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

Required components for all models and types

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)

ADAPTER SPECIFICATIONS

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

Draw in output shaft with hydraulic unit.

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. 72: Identifying Collar Nut

REMOVING AND INSTALLING/REPLACING LEFT OR RIGHT OUTPUT SHAFT

IMPORTANT: When reinstalling, place a new circlip on the output shaft! The RADIAL SHAFT SEAL FOR THE OUTPUT SHAFT should be replaced every time the output shaft is removed and installed.

Observe SAFETY INFORMATION for raising the vehicle.

Remove REAR WHEEL.

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

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

Tightening torque 33 41 1AZ Installation note: Lightly oil gearing on shaft journal.

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

Replace collar nut and secure by means of positive peening on flat areas of output shaft.

Fig. 73: Identifying Collar Nut

Remove REAR AXLE FINAL DRIVE.

IMPORTANT: Secure output shaft against falling out.

Do not damage dust plates (1, 2) when setting down output shaft.

Press OUTPUT SHAFT OUT OF DRIVE FLANGE and remove towards center of vehicle.

Fig. 74: Identifying Dust Plates

Installation note: High installation forces indicate that the output shaft spline teeth are damaged or deformed! Check gearing, replace damaged components.

Check dust plate (1) for damage, renew if necessary.

Circlip (2) must be replaced.

Coat contact surface (3) of output shaft with APPROVED FINAL DRIVE OIL.

Fig. 75: Identifying Dust Plate, Circlip And Coat Contact Surface

After installation

• Check FINAL DRIVE OIL LEVEL , correct if necessary.

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