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

ENGINE 273 

Diameter of the crankshaft flange altered

BT03.20-P-0003-01A

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

Courtesy of MERCEDES-BENZ USA

Fig 2: Identifying Insertion Tool (273 589 00 43 00)

Courtesy of MERCEDES-BENZ USA

Fig 3: Identifying Squeeze Gun (112 589 00 25 00)

Courtesy of MERCEDES-BENZ USA

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 4: Crankshaft Radial Sealing Ring, Protective Lip And Contact Surface

Courtesy of MERCEDES-BENZ USA

1. 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).
2. Clean and degrease sealing surface of new end cover (2).
3. Apply sealant with the squeeze gun in the form of a bead (A) with a height and width of 2.0 mm (± 0.5) mm to crankcase (4) and oil pan.

   Use exclusively approved sealants. Do not spread bead (A). Mount end cover (2) within 5 minutes after applying sealant.

   The contact surface (3a) must not be cleaned using abrasive paper since this would damage the surface of the crankshaft.

   Fig 5: Sealant Application Area On Crankcase And Oil Pan

   Courtesy of MERCEDES-BENZ USA
4. 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).

   Special Tool:

   Insertion Tool 271 589 00 43 00

   Engine 273.92 Up To Engine End No. 300193, 273.96/97 Up To Engine End No. 300345.

   Insertion Tool 273 589 00 43 00

   Engine 273.92 As Of Engine End No. 300194, 273.96/97 As Of Engine End No. 300346.

   Fig 6: Crankshaft Radial Sealing Ring And Insertion Tool

   Courtesy of MERCEDES-BENZ USA
5. Separate insertion tool (7) from insertion tool (6).
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 7: End Cover And Crankshaft Radial Shaft Sealing Ring

   Courtesy of MERCEDES-BENZ USA
7. Tighten bolts (2a) gradually in crosswise pattern, then tighten the bolts (2b) - observe tightening torque.
8. Detach insertion tool (6) from crankshaft flange (3).
   Fig 8: Checking Protective Lip Correct Installation Position

   Courtesy of MERCEDES-BENZ USA
9. 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.

10. Check for correct installation position of the protective lip (1s).

    An incorrect installation position leads to premature wear of crankshaft radial sealing ring (1).

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