Replace side radial shaft sealing rings on axle drive module

AR35.30-P-0002RFW

Replace side radial shaft sealing rings on axle drive module

06.03.2020

Model

253.992/993

32a

Radial shaft sealing ring

37

Rear axle shaft (inserted)

50

Axle drive module

 Danger

Risk of explosion caused by escaping hydrogen or overheating of the fuel tanks when working on the hydrogen system. Risk of frostbite to body parts caused by escaping gas and by touching component parts carrying gas when emptying fuel tanks. Risk of asphyxiation caused by inhalation of air diluted by hydrogen. Risk of burn injuries by coming into contact with an invisible pale blue hydrogen flame.

AS00.00-Z-0030-01B

 Caution

Risk of injury to skin and eyes due to handling of transmission oil. Health risk caused by swallowing transmission oil

Wear protective gloves, protective clothing and safety glasses.
Do not pour transmission oil into beverage bottles.

AS00.40-Z-0001-01A

Topical note

Notes on fuel cell system

AH00.00-P-0022-01RFW

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Notes on safety-relevant components

AH00.00-Z-0019-01A

Notes on repair work on suspension components

AH00.00-P-0100-01A



Remove

1

Ensure that the requirements for driving into the workshop are fulfilled.

Topical note

Requirements for driving into the workshop

AH00.00-P-0021-01RFW

2

Print out "tank system, fuel cell, form event log," fill out, and attach to the vehicle somewhere clearly visible.



Model 253.992/993 with engine 780

OF00.00-P-3000-21RFW

3

Remove corresponding inserted rear axle shaft (37).

AR35.30-P-0621RFW

4

Pry out radial shaft sealing ring (32a) using suitable tool from axle drive module (50).


Do not damage the seat of the radial shaft sealing ring (32a) in the rear axle differential (50).
Otherwise leaks may occur.

5

Clean sitting surface of radial shaft sealing ring (32a) in axle drive module (50).

Assembly cleaner

*BR00.45-Z-1028-04A

6

Check sitting surface of radial shaft sealing ring (32a) in axle drive module (50) for damage.

If any damage is present on the sitting surface,



replace axle drive module (50).

Model 253.992/993 with engine 780

AR08.10-P-0001RFW



Install

7

Moisten sealing lip of new radial shaft sealing ring (32a) with transmission oil.



Specified gear oils (cars, cross-country vehicles) - survey

Model 253.992/993

BB00.40-P-0231-01A


Do not apply any oil to the sitting surface in the axle drive module (50) and around the outer circumference of the radial shaft sealing ring (32a).
Otherwise leaks may occur.

8

Use drift to press-in new radial shaft sealing ring (32a) far enough for the drift to make contact with the axle drive module (50).

 Drift

*253589001500

9

Install corresponding rear axle shaft(37).

AR35.30-P-0621RFW

 Install underfloor paneling on rear axle only after performing a leak test.

Repair materials

Number

Designation

Order number

BR00.45-Z-1028-04A

Assembly cleaner

A 000 986 56 01