Installing rear crankshaft radial seal - AR03.20-P-3063-01SX

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CRANKCASE, TIMING CASE COVER, END COVER

Number	Designation		Engine 273
BA01.40-P-1003-01T	Bolt, end cover to crankcase or oil pan	Nm	9

Fig 1: Identifying Insertion Tool (271 589 00 43 00)

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1013-01A	Sealant	A 003 989 98 20
BR00.45-Z-1028-04A	Cleaner from package	Adolf Wurth GmbH & Co. KG Reinhold-Wurth-Str. 12-17 74653 Kunzelsau-Gaisbach Germany Tel. +49 7940 15-0 Fax +49 7940 15-1000 www.wuerth.de
BR00.45-Z-1038-04A	Loctite 7200	Henkel Loctite Deutschland GmbH Arabellastrasse 17 81925 Munchen Germany Tel. +49 899268-0 Fax + 49 899101978 www.Loctite.de

The crankshaft radial sealing ring (1) is vulcanized into the end cover (2) and can only, therefore, be replaced together with the end cover (2). Do not reuse the end cover (2) with the rear crankshaft radial sealing ring (1) after removal.

The crankshaft radial sealing ring (1) has a protective lip (1s) in addition to the sealing lip (1d). The sealing lip (1d), protective lip (1s) and contact surface (3a) at the crankshaft flange (3) must not be lubricated for assembly!

Fig 2: Identifying Crankshaft Flange, Contact Surface, Sealing Ring, Protective And Sealing Lip

Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Clean and degrease crankcase (4) and oil pan in the area of the applied sealant as well as contact surface (3a) on the crankshaft flange (3).
The contact surface (3a) must not be cleaned using abrasive paper since this would damage the surface of the crankshaft.
Clean and degrease sealing surface on new end cover (2).
Apply sealant in the form of a bead (A) with a height and width of 2.0 mm (±.5) mm to crankcase (4)and oil pan.
Only use approved sealants. Do not spread bead (A). Mount end cover (2) with 5 minutes of applying sealant.

Fig 3: Identifying Applying Sealant Area On Crankcase
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Mount end cover (2)with crankshaft radial sealing ring (1)on insertion tool (6).
Make sure that the protective lip (1s) faces towards the side applying the force and the sealing lip (1d) faces in the direction of the crankcase. Leakage could occur otherwise at rear crankshaft radial sealing ring (1).

The crankshaft radial sealing ring (1) can only be mounted on the insertion tool (6), if insertion tool (6) is fitted together with insertion tool (7).

Fig 4: Identifying Lip On Crankshaft Radial Sealing Ring And Insertion Tool
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Separate insertion tool (7) from insertion tool (6).
Mount end cover (2)with crankshaft radial shaft sealing ring (1) and insertion tool (6) onto contact surface (3a) on crankshaft flange (3).

Fig 5: Identifying End Cover, Crankshaft Flange And Insertion Tool
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.

Fig 6: Identifying Crankshaft Radial Seal, Protective Lip, End Cover, Crankshaft Flange And Crankcase
Courtesy of MERCEDES-BENZ OF NORTH AMERICA.
Tighten bolts (2a) gradually in crosswise pattern, then tighten the bolts (2b). Pay attention to tightening torque.
Detach insertion tool (6)from crankshaft flange (3).
Carefully lift protective lip (1s) and check the correct installation position of sealing lip (1d).
A wrong installation position leads to leakage.

The sealing lip (1d) must point towards crankcase (4)all around its circumference.
Check the correct installation position of the protective lip (1s).
An incorrect installation position leads to premature wear of the crankshaft radial shaft sealing ring (1).

The protective lip (1s) must point towards transmission housing around its entire circumference.