Remove/install front axle shafts

AR33.30-P-0620MSA

Remove/install front axle shafts

09.05.2018

Model

257 with engine 256 with transmission 725.0

with code M005 (4MATIC)

02

Slide hammer puller

03

Pulling device

1

Front axle shaft

1s

Retaining ring

2

Retaining ring

4

Intermediate shaft

 Caution

Risk of injury caused by scraping or cutting body parts on sharp vehicle parts

Always wear protective gloves when working on or near sharp and non-deburred vehicle parts.
Deburr repair panels.

AS00.00-Z-0017-01A

Topical note

Notes on threaded connections fastened using a tightening angle-based tightening process

AH00.00-P-0020-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Notes on repair work on suspension components

AH00.00-P-0100-01A



Remove

1

Remove left or right front wheel-and-tire assembly.

AR40.10-P-1102A

2

Remove screw fastening front axle shaft to wheel hub.

 The aid of a helper is required to remove the screw.

3

Detach steering knuckle from upper transverse control arm.

AR33.25-P-0400FR

4

Remove drive shaft from steering knuckle.

5

Pull front axle shafts (1) out of front axle differential and intermediate shaft (4) using impact extractor (02) and pull-off device (03).


If the left front axle shaft (1) is seized, remove the retaining ring (2) on the intermediate shaft (4) and pull out the left front axle shaft (1) with the intermediate shaft (4).
Otherwise the oil pan may be damaged.


Ensure scrupulous cleanliness when working on the front axle differential.
Otherwise the front axle differential will be damaged.

 Extraction tool

*221589043300

 Impact extractor

*602589003300

6

Fix steering knuckle on upper transverse control arm.

7.1

Remove retaining ring from front axle shaft (1).

When removing right front axle shaft (1).

7.2

Remove retaining ring (1s) of intermediate shaft (4).

When removing left front axle shaft (1).

8

Remove radial shaft sealing ring.

When removing right front axle shaft (1).

AR33.30-P-0540MSA



Install

9

Check dust boots of front axle shafts (1).

If damage is found,



Replace front axle shaft.

10

Install radial shaft sealing ring.

When installing right front axle shaft (1).

AR33.30-P-0540MSA

 Replace radial shaft sealing ring.

11.1

Install retaining ring (1s) of intermediate shaft (4).

When installing left front axle shaft (1).

 Replace retaining ring (1s) of intermediate shaft (4).

 Apply light coating of microgrease to retaining ring (1s).

Klueber Microlube GNY 202

*BR00.45-Z-1071-06A

11.2

Install retaining ring of front axle shaft (1).

When installing right front axle shaft (1).

 Replace retaining ring of front axle shaft (1).

 Apply light coating of microgrease to retaining ring.

Klueber Microlube GNY 202

*BR00.45-Z-1071-06A

12

Install intermediate shaft (4).

If necessary.

AR33.30-P-0625MSA

13

Lightly grease gearing of intermediate shaft (4).

Before installation of the left front axle shaft (1).

Klueber Microlube GNY 202

*BR00.45-Z-1071-06A

14

Press front axle shafts (1) into front axle differential and intermediate shaft (4).

15

Release fixing and insert front axle shafts (1) into steering knuckle.

16

Attach steering knuckle to upper transverse control arm.

 Nut, steering knuckle to transverse control arm

*BA33.20-P-1006-01U

17

Tighten screw fastening front axle shaft to wheel hub.

 Replace bolt.

 The aid of a helper is required to tighten the screw.

 Screw/bolt, front axle shaft to wheel hub

*BA33.30-P-1001-02H

18

Install left or right front wheel-and-tire assembly.

AR40.10-P-1102A

19

Check front axle differential for leaktightness and proper operation.

 Wheel control, hub

Number

Designation

Model 257

BA33.20-P-1006-01U

Nut, steering knuckle to transverse control arm

Stage 1

Nm

50

Stage 2

°

45

 Front axle shaft

Number

Designation

Model 257

BA33.30-P-1001-02H

Screw/bolt, front axle shaft to wheel hub

Stage 1

Nm

160

Stage 2

loosen approx. 90°

Stage 3

Nm

220

Stage 4

°

45

Repair materials

Number

Designation

Order number

BR00.45-Z-1071-06A

Klueber Microlube GNY 202

A 001 989 44 51 10