27 21 040 Replacing radial shaft seal for actuator shaft (ATC 450)

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

Special tools required:

11 1 200
11 1 380
23 0 490

IMPORTANT: Read and comply with notes on protection against electrostatic damage (ESD protection), see61 35... NOTES ON ESD PROTECTION (ELECTRO STATIC DISCHARGE) .

Necessary preliminary tasks:

Disconnect battery earth lead. See 12 00... INSTRUCTIONS FOR DISCONNECTING AND CONNECTING BATTERY .
Remove cross member.

Disconnect connector (1). Release screws (2) and remove transfer box from control unit (longitudinal torque module) (3). Tightening torque, see 27 00 13AZ in TRANSFER BOX IN GENERAL .

Fig 1: Release Screws (2) And Remove Transfer Box

G00497024

Courtesy of BMW OF NORTH AMERICA, INC.

Screw special tool 23 0 490 into radial shaft seal. Drive out radial shaft seal (1) with impact weight (2).

Fig 2: Drive Out Radial Shaft Seal (1) With Impact Weight (2)

G00497025

Courtesy of BMW OF NORTH AMERICA, INC.

Push the assembly sleeve 11 1 380 over the actuator shaft.

IMPORTANT: Non-observance involves a risk of damage to the radial shaft seal.

Fig 3: Push The Assembly Sleeve 11 1 380 Over The Actuator Shaft

G00497026

Courtesy of BMW OF NORTH AMERICA, INC.

Slide the new radial shaft seal (1) over the assembly sleeve (2) onto the actuator shaft.

Fig 4: Slide The New Radial Shaft Seal (1) Over The Assembly Sleeve

G00497027

Courtesy of BMW OF NORTH AMERICA, INC.

Drive radial shaft seal fully home using special tool 11 1 200 and plastic hammer. Remove the assembly sleeve.

Fig 5: Drive Radial Shaft Seal Fully Home Using Special Tool 11 1 200

G00497028

Courtesy of BMW OF NORTH AMERICA, INC.