11 14 202 Removing and installing/replacing radial shaft seal (W20)

Special tools required: 

• 11 4 470 
• 23 4 100 

Preliminary work needed: 

• Remove drive unit (range extender). Refer to REMOVING AND INSTALLING COMPLETE DRIVE UNIT (RANGE EXTENDER) (I3 BASE, I3S) .
• Remove engine from drive unit. Refer to REMOVING AND INSTALLING ENGINE FROM DRIVE UNIT (I3 BASE, I3S) .
• Refer to REMOVING RANGE EXTENDER ELECTRIC MACHINE .

Release all screws (1).

Tightening torque 11 14 3AZ .

Remove generator lid (2).

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Clean sealing surface (1) on generator lid and sealing surface on crankcase with special tool 11 4 470  .

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Remove radial shaft seal (1) with a suitable mounting lever (2).

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Check sealing surface (1) for damage.

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Position sealing ring (1) on special tool 23 4 100  .

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Press sealing ring (1) into generator lid (2) with special tool 23 4 100  in arrow direction.

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Apply sealing bead with sealing compound 1.7 .

Position generator lid (2) on crankcase.

Insert all bolts (1).

Tightening torque 11 14 3AZ .

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Assemble engine.