23 12 050 Replacing radial shaft seal for output flange (GS6-37BZ / DZ H-transmission)

Special tools required: 

• 23 0 020
• 23 2 320
• 23 3 161
• 23 3 162
• 33 1 150

Necessary preliminary tasks: 

• Remove exhaust system
• Support transmission. 
• Remove transmission cross-member 
• Remove transmission bearing block 
• Unflange propeller shaft from transmission and tie up to one side

Brace output flange with special tool 23 0 020.

Release collar nut with special tool 23 2 320.

Installation: 

Mark flange with thermo pin and heat to min. 100°C.

Secure collar nut with Loctite 243.

• Loctite 243.
• For tightening torque refer to 23 21 1AZ in 23 21 TRANSMISSION SHAFTS .
  Fig 1: Special Tools (23 0 020), (23 0 200) And (23 2 320)

  Courtesy of BMW OF NORTH AMERICA, INC.

Detach output flange with special tool 33 1 150 from output shaft.

Fig 2: Special Tool (33 1 150)

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw on special tool 23 3 161.

Push special tool over output shaft and screw firmly into sealing ring.

Fig 3: Special Tools (23 3 161), (23 3 210) And Installation Direction

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screw into special tool again and continue turning until sealing ring is pulled out of transmission housing.

If necessary, remove Woodruff key of sealing ring.

Fig 4: Special Tools (23 3 161), (23 3 210) And Installation Direction

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Coat sealing lips of new radial seal with gear oil.

Drive in radial seal as far as it will go with special tool 23 3 162 and plastic hammer.

Fig 5: Special Tools (23 3 162), (23 3 230), (23 4 110) And Installation Direction

Courtesy of BMW OF NORTH AMERICA, INC.