Remove/install front axle

AR33.10-P-0100SN

Remove/install front axle

11.12.2018

Model

450.3/4 up to 1/7/01

1

Screw

2

Bracket

3

Line

L6/1

Left front rpm sensor

L6/2

Right front rpm sensor

4

Steering wheel

8

Trim weight

12

Nut

5

Holding device

9

Steering column

13

Support bushing

6

Bolts

10

Cam bolt

7

Front axle carrier

11

Rack-and-pinion steering



Remove

Topical note

Notes on bolted connections with self tapping screws

AH00.00-P-0007-01SF

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

1

Remove front wheels

AR40.10-P-1100SM

2

Remove underfloor paneling

AR61.30-P-1001SM

3

Detach left and right brake caliper and fasten to a suitable point with brake hose connected

AR42.10-P-0070SM


Do not kink the brake hose and do not leave the brake caliper hanging freely,
otherwise the brake hose could be damaged.

 Do not open the hydraulic circuit of the brake system.

4

Remove screws (1) and pull left front rpm sensor (L6/1) and right front rpm sensor (L6/2) out of corresponding steering knuckle

5

Release line (3) of left front rpm sensor (L6/1) and of right front rpm sensor (L6/2) from corresponding bracket (2)

6

Lower vehicle with lifting platform

7

Turn steering to center position and block steering wheel (4) with holding device (5)


If the steering is not in the center position,
the fanfare horns and airbag clock spring contact could be damaged.

 Retainer device

*129589012100

8

Lift vehicle on vehicle lift

9

Support and secure front axle carrier (7) using transmission jack and removal fixture. Remove screws (6) on left and right sides of front axle carrier (7)

 Removal fixture

*450589026200

10

Unscrew nut (12) at connection of steering column (9) with rack-and-pinion steering (11) and remove cam bolt (10)


Only the cam bolt (10) and nut (12) approved for model 450 may be used. .
Screws and nuts of other models with the same dimensions have different properties due to other surface coatings and may impair the strength of the bolted connection

 When the nut (12) has been slackened, the cam bolt (10) rotates with it approx. half a revolution. However, it is not necessary to counterhold the cam bolt (10).

11

Remove screws from left and right support bushings (13) and remove both support bushings (13)

12

Lower front axle with transmission jack and guide front axle out from under the vehicle



Install

13

Lift and position front axle using transmission jack

 Removal fixture

*450589026200

14

Screw in screws (6) on front axle carrier (7) up to end stop

15

Push front axle carrier (7) into foremost position and align centrally in this position

16

Align trim weight (8)

On model 450.3/4 except 450.418 from 1.10.1998 to 15.11.1999 or as of VIN no. TCC01MC01XH003593 up to VIN no. WME01MC01YH000004.

 The distance from the leaf spring to the front screw sleeve must be 5 mm.

17

Tighten screws (6) on front axle carrier (7)

 Bolt, front-axle carrier to body

*BA33.10-P-1001-01D

18

Connect rack-and-pinion steering (11) with steering column (9)

AR46.20-P-0600-01SM


Replace self-locking nut (12) and cam bolt (10).
Only the cam bolt (10) and nut (12) approved for model 450 may be used.
Bolts and nuts of other models with the same dimensions have different properties due to other surface coatings and may impair the strength of the bolted connection.

 Screw/bolt, steering coupling to rack-and-pinion steering

*BA46.10-P-1001-01F

 Retainer device

*129589012100

19

Fasten left and right support bushings (13) to body


Screw in the screws of the support bushing (13) by hand initially,
otherwise the weld nuts on the body could be damaged.

 Bolt, support bearing to body

*BA32.25-P-1002-04F

20

Install left and right brake caliper

AR42.10-P-0070SM


Do not kink the brake hose,
otherwise the brake hose could be damaged.

 It is not necessary to bleed the brake system.

21

Insert left front rpm sensor (L6/1) and right front rpm sensor (L6/2) into corresponding steering knuckles and tighten screws (1)

 Remove fouling on left front rpm sensor (L6/1) and right front rpm sensor (L6/2).

 Bolt, wheel speed sensor to steering knuckle

*BA42.30-P-1001-01D

22

Clip line (3) of left front rpm sensor (L6/1) and of right front rpm sensor (L6/2) into corresponding bracket (2)

23

Mount front wheels

AR40.10-P-1100SM

24

Perform wheel alignment check

AR40.20-P-0200SM

25

Install underbody paneling

AR61.30-P-1001SM

 Shock-absorber struts

Number

Designation

Model 450.3/4

BA32.25-P-1002-04F

Bolt, support bearing to body

Nm

33

 Front axle carrier

Number

Designation

Model 450.3/4

BA33.10-P-1001-01D

Bolt, front-axle carrier to body

Nm

85

 Front axle rpm sensor

Number

Designation

Model 450.3/4

BA42.30-P-1001-01D

Bolt, wheel speed sensor to steering knuckle

Nm

8,5

 Steering shaft

Number

Designation

Model 450.3/4

BA46.10-P-1001-01F

Screw/bolt, steering coupling to rack-and-pinion steering

Nm

27