Install Rear Crankshaft Radial Sealing Ring - AR03.20-P-3063-01MR

Engine 274

MODIFICATION NOTES

20.05.2019

Rear end cover bolt at crankcase/oil pan (belt side)

BA01.40-P-1002-01K

CRANKCASE, TIMING CASE COVER, END COVER

Number	Designation		Engine 274
BA01.40-P-1002-01K	Screw, rear end cover to crankcase/oil pan (belt side)	Nm	9

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

Courtesy of MERCEDES-BENZ USA

REPAIR MATERIALS

Number	Designation	Order number
BR00.45-Z-1013-01A	Sealant, Loctite 5970, 50 ml	A 003 989 98 20 10
BR00.45-Z-1028-04A	Assembly cleaner	Adolf Wurth GmbH & Co. KG Reinhold-Wurth-Str. 12-17 74653 Kunzelsau-Gaisbach Germany Tel. +49 7940 15-0 Fax +49 7940 15-1000 http://www.wuerth.de
BR00.45-Z-1038-04A	Loctite 7200	Henkel AG & Co. KGaA http://www.loctite.de

The following special tool is required: insertion tool (02)

The insertion tool (02) includes insertion tool (01).

Clean and degrease crankcase (3) and oil pan (4) in the area of the applied sealant as well as contact surface on the crankshaft flange.
The crankshaft radial sealing ring (6) is vulcanized into the end cover (5) and can only, therefore, be replaced together with the end cover (5). Do not reuse the end cover (5) with the rear crankshaft radial sealing ring (6) after removal. The crankshaft radial sealing ring (6) is fitted with both a sealing lip and a protective lip. The sealing lip, protective lip and contact surface on the crankshaft flange must not be oiled for assembly.

Courtesy of MERCEDES-BENZ USA
Clean and degrease sealing surface of new end cover (5).
Apply sealant in the form of a bead with a height and width of 2.0 mm (±0.5 mm) to cylinder crankcase (3) and oil pan (4).
Use exclusively approved sealants. Do not spread bead.

Mount end cover (5) within 5 minutes after applying sealant.

Courtesy of MERCEDES-BENZ USA
Mount end cover (5) with crankshaft radial sealing ring (6) on insertion tool (02).
Make sure that the protective lip faces in the direction of the transmission housing and the sealing lip faces in the direction of the cylinder crankcase (3). Leakage could occur otherwise at rear crankshaft radial sealing ring (6).

Courtesy of MERCEDES-BENZ USA
Detach insertion tool (01) from insertion tool (02).
Mount end cover (5) with crankshaft radial sealing ring (6) and insertion tool (02) onto contact surface (7a) on crankshaft flange (7).
The contact surface (7a) must not be removed with coarse abrasive cloth. This destroys the surface of the crankshaft and the crankshaft will be unusable.
Tighten screw/bolts (5a) gradually via the cross. Observe tightening torque.
Detach insertion tool (02) from crankshaft flange (7).
Raise protective lip carefully and check for correct installation position of the sealing lip.
The sealing lip must point towards the cylinder crankcase (3) all around its circumference.

A wrong installation position leads to leakage.
Check for correct installation position of the protective lip.
The protective lip must point over the whole circumference to the transmission housing.

An incorrect installation position leads to premature wear of crankshaft radial sealing ring (6).

Courtesy of MERCEDES-BENZ USA