Install cover with radial shaft sealing ring · ar0140s892501ps · Mercedes-Benz WIS

AR01.40-S-8925-01PS	Install cover with radial shaft sealing ring
Topical note	Notes on avoiding damage through contamination and foreign objects		AH00.00-P-5000-01A

Engine

642 in model 470, 471

 Crankcase, timing case cover, bottom half of crankcase

Number	Designation			Engine 642 in model 470, 471
BA01.40-N-1001-01S	Bolt, crankcase cover at rear to crankcase	Stage 1	Nm	8
		Stage 2	Nm	10

Install cover with radial shaft sealing ring

271 589 00 43 00

Installation tool

112 589 00 25 00

Application gun

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	A 000 986 56 01

 The radial shaft sealing ring (1) is vulcanized into the crankcase cover (2) and can only be replaced together with the crankcase cover (2). Do not reuse crankcase cover (2) with radial shaft sealing ring (1) after removal.
 Do not touch the sealing lips (1d) of the radial shaft sealing ring (1) and the contact surface (3a) on the crankshaft flange (3), as they must be free of oil and grease.
 When using the  insertion device, make absolutely sure that the sealing lip (1d) of the radial shaft sealing ring (1) is aligned correctly.
Ignoring this instruction may result in a leaky radial shaft sealing ring (1).

S01.40-4533-06

Preparation

1	 Connect insertion device (271) and  insertion device (271a).

 Later on during assembly, the conical shape of the  insertion device (271a) pushes the sealing lip (1d) in the right direction.

2	Slide crankcase cover (2) onto connected  insertion tool (271, 271a).

 The sealing lip (1d) must point in the direction of the crankcase.

3	 Pull off insertion device (271a) from  insertion device (271).

S01.40-4531-05

Cleaning

4	Degrease the contact surface on the crankshaft flange with assembly cleaner.

 Do not clean the contact surface with abrasive paper.
This avoids damage to the surface and leaks.

5	Degrease the sealing surface of the new crankcase cover with assembly cleaner.

Install

6	It must Apply sealant to new crankcase cover in the shape of a bead (A) with a thickness of roughly 2.0 mm using a  squeeze gun.

 Do not spread the bead (A). Mount the crankcase cover within a period of 5 min after applying the sealant.

P01.40-2264-11

S01.40-4532-78

1	Radial shaft sealing ring	2	Bottom half of crankcase	3a	Contact surface
1d	Sealing lip	2a	Screws (10 ea.)	4	Crankcase
1s	Protective lip	3	Crankshaft flange	271	Insertion tool

7	Plug crankcase cover (2) with mounted  insertion device (271) onto crankshaft flange (3).

8	Carefully slide crankcase cover (2) with radial shaft sealing ring (1) onto contact surface (3a) of crankshaft flange (3).

 The sealing lip (1d) must point in the direction of the crankcase (4) along the entire circumference.

9	Counterhold the crankcase cover (2) and detach the  insertion device (271) from the crankshaft flange (3).

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

 The protective lip (1s) must point toward the transmission housing around the entire circumference of the crankshaft flange (3).
This avoids premature wear and leaks.

11	Gradually tighten screws (2a) in a crosswise sequence  .

 The screws (2a) must have a shank length of 20 mm.

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