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28 40 010 Removing And Installing Or Replacing Twin Clutch (GS7D36SG)

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Special tools required: 

IMPORTANT: After completing work:
  • Check TRANSMISSION OIL LEVEL .

    Use only the approved transmission oil .

  • Reset torque characteristic (service function).
  • Perform clutch adaptation (Service Functions).
  • Teach in valve characteristics (Service Functions).

Failure to comply with this instruction will result in serious damage to the twin-clutch gearbox.
IMPORTANT: Read and comply with notes on PROTECTION AGAINST ELECTROSTATIC DISCHARGE (ESD PROTECTION) .
IMPORTANT: Twin-clutch gearbox must be on neutral (position "N") prior to removal of clutch or gear box!
Gearbox position "N" can only be engaged when the engine is running!
To prevent the transmission oil from spilling out, set the gearbox upright before removing the twin clutch.
It must hereby be ensured that the output flange and/or rear main shaft is not blocked and can be rotated freely.

Necessary preliminary tasks: 

IMPORTANT: The clutch cage can only be removed and installed with special tool 23 0 400 .
Special tool 23 0 400 must be pushed in entirely and rest flush on clutch cage.
If necessary, turn the gearbox input shafts relative to each other.
Fig 1: Special Tool (23 0 400)
G06905082Courtesy of BMW OF NORTH AMERICA, INC.

Push parking lock lever (1) all the way up and secure it with cable strap (2).

Fig 2: Parking Lock Lever And Cable Strap
G06905083Courtesy of BMW OF NORTH AMERICA, INC.

Rotate drive shaft (1) until holes (2) are directly visible.

Check clearance with a suitable tool.

Fig 3: Checking Clearance Using Suitable Tool
G06905084Courtesy of BMW OF NORTH AMERICA, INC.

Install special tool 23 0 400 and turn anticlockwise to release clutch (approx. 8 turns).

Pull clutch out of housing.

Installation note: 

Set gearbox upright.

The clutch is correctly installed if the oil pump gear turns.

Install the clutch with special tool 23 0 400 while constantly rotating.

Turn clockwise up to stop, then screw down to torque.

Tightening torque: 10-20 Nm.

Fig 4: Installing Clutch Using Special Tool (23 0 400)
G06905085Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Warning: Installing the clutch may involve the danger of injury!

Installation note: 

Under no circumstances are hammers or other pounding tools to be used when installing the clutch.

The clutch must be slid over the piston rings and onto the clutch support.

IMPORTANT: When reinstalling the clutch, check that piston rings (1) and needle bearing (2) are present and correctly seated on the clutch support.
Mount clutch carefully to clutch support/do not tilt, to avoid damaging the piston rings (1).
Fig 5: Piston Rings And Needle Bearing
G06905086Courtesy of BMW OF NORTH AMERICA, INC.