Remove/install rack-and-pinion steering

AR46.20-P-0600MCB

Remove/install rack-and-pinion steering

12.02.2019

Model

451.3/4

with code V26 (Power steering, EPS (FFO))

Shown on model 451.30

1

Rack-and-pinion steering

5

Tie rod end

9

Bolts

2

Steering coupling

6

Nut

B23x1

Power steering torque sensor connector

3

Nut

7

Front axle carrier

M19x1

Power steering connector

4

Screw

8

Bolts

W30/2

Ground; power steering pump noise suppression



Remove

 Danger

Risk of death caused by vehicle slipping or toppling off of the lifting platform.

Align vehicle between vehicle lift columns and position the four support plates at the vehicle lift support points specified by the vehicle manufacturer.

AS00.00-Z-0010-01A

Topical note

Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

Evaluating steering gear when repairing accident vehicles

AH46.20-P-9409-01A

1

Raise vehicle with vehicle lift

2

Remove underfloor panels

3

Remove front bulkhead

Model 451.3 (except 451.39), 451.4 (except 451.49)
with code V26 (Power steering, EPS (FFO))

 The front bulkhead is attached with two nuts.

4

Loosen nut (3) on steering coupling (2) until it can be turned by hand


Do not unscrew nut (3) completely.
Otherwise, the screw/bolt (4) could fall out and the steering coupling (2) could disconnect, thus damaging the fanfare horns and airbag clock spring contact while setting the front wheels to a straight-ahead position.

 Turn the front wheels onto lock until the nut (3) is accessible.

5

Lower vehicle with vehicle lift

6

Place the front wheels in the straight-ahead position and block the steering wheel using the holding device


Lock steering wheel.
Otherwise the fanfare horns and airbag clock spring contact may be damaged.

 Retainer device

*129589012100

7

Raise vehicle using the vehicle lift and secure in place

AR00.60-P-0100MCC

8

Unscrew nut (3) on the steering coupling (2), remove bolt (4) and slide steering coupling (2) upwards off the rack-and-pinion steering (1)


Only use bolt (4) and nut (3) approved for model 451.
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.

 When the nut (3) is loosened, the cam-shaped bolt (4) rotates with it approx. half a revolution. However, the bolt (4) does not have to be counterheld.
Check the steering coupling (2) for ease of movement and replace if necessary.

9

Disconnect connector of power steering torque sensor (B23x1)

10

Disconnect power steering connector (M19x1)

11

Ground; disconnect interference suppression of power steering pump (W30/2)

12

Remove front wheels

Model 451.3/4
with code 494 (US version)
with code V26 (Power steering, EPS (FFO))

AR40.10-P-1100MCU

Model 451.3/4
with code V26 (Power steering, EPS (FFO))
except code 494 (US version)

AR40.10-P-1100MCC

13

Unscrew nut (6) on the left and right tie rod end (5) and pry off left and right tie rod end (5) using puller and unhook


Carefully press off tie rod ends (5).
Otherwise, the seal bellows may be damaged.

 Puller

*450589013300

14

Remove front axle carrier support

Model 451.390/392/490/492
with code V26 (Power steering, EPS (FFO))

AR33.10-P-0002MEX

Model 451.391/491
with code V26 (Power steering, EPS (FFO))

AR33.10-P-0002MEV

 Remove front axle carrier support from front axle carrier (7) only.

15

Support front axle carrier (7) using telescopic lifter and removal fixture



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B

 Removal fixture

*450589026200

16

Remove bolts (8) from front axle carrier (7)

17

Lower the front axle carrier (7) carefully until the bolts (9) are accessible


Do not pull front axle carrier (7) downward.
Otherwise, it may damage the axle components.

18

Remove screw/bolts (9)

 The left bolt (9) on the engine power steering can only be removed with the elastomer bearing of the rack-and-pinion steering (1).

19

Remove rack-and-pinion steering (1)

20

Remove elastomer bearing for mounting rack-and-pinion steering (1) and remove bolts (9)

AR46.20-P-0600-02SM



Check

21

Check elastomer bearing for mounting rack-and-pinion steering (1) for damage, replace, if necessary



Install

22

Insert bolts (9) and install elastomer bearing for mounting rack-and-pinion steering (1)

AR46.20-P-0600-02SM

 Replace bolts (9).

Antifriction paste, rubber parts 2.5 kg, DBL 6867.00

*BR00.45-Z-1002-06A

23

Mount rack-and-pinion steering (1) on the front axle carrier (7)

24

Raise front axle carrier (7) using telescopic lifter and removal fixture up to bolting points



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B

 Removal fixture

*450589026200

25

Tighten screws (9)

 Bolt, rack-and-pinion steering to front axle carrier

*BA46.20-P-1001-01G

26

Insert and tighten bolts (8)



000 588 11 62 00 Major assembly mount

WS01.00-P-0092B

 Screw in bolts (8) and remove telescopic lifter with removal fixture.
Slide front axle carrier (7) into foremost position and align centrally in this position, then tighten the bolts (8).

 Bolt, front-axle carrier to body

*BA33.10-P-1001-01D

27

Install front axle carrier support

Model 451.390/392/490/492
with code V26 (Power steering, EPS (FFO))

AR33.10-P-0002MEX

Model 451.391/491
with code V26 (Power steering, EPS (FFO))

AR33.10-P-0002MEV

28

Engage left and right tie rod end (5) in the steering knuckle and tighten with nuts (6)


Replace self-locking nut (6).
Otherwise, the nuts (6) may work themselves loose.

 Check seal bellows, if necessary, replace tie rod end (5).

 Self-locking nut, tie rod to steering knuckle

*BA46.40-P-1001-01F

29

Mount front wheels

Model 451.3/4
with code 494 (US version)
with code V26 (Power steering, EPS (FFO))

AR40.10-P-1100MCU

Model 451.3/4
with code V26 (Power steering, EPS (FFO))
except code 494 (US version)

AR40.10-P-1100MCC

30

Contact connector of power steering torque sensor (B23x1)

31

Contact power steering connector (M19x1)

32

Ground; contact interference suppressor of power steering pump (W30/2)

33

Mount steering coupling (2) on the rack-and-pinion steering (1), insert bolt (4) and screw on nut (3)


Replace nut (3) and screw (4). Only use bolt (4) and nut (3) approved for model 451.
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.

 Ensure that the front wheels are in the straight-ahead position.
The nut (3) of steering coupling (2) will be tightened later.

34

Lower the vehicle with the vehicle lift and remove tensioning strap

Secure vehicle on vehicle lift

AR00.60-P-0100MCC

35

Remove retainer from steering wheel

 Retainer device

*129589012100

36

Raise vehicle with vehicle lift

37

Tighten nut (3) on steering coupling (2)

 Turn the front wheels onto lock until the nut (3) is accessible.

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

*BA46.10-P-1001-01F

38

Install front bulkhead

Model 451.3 (except 451.39), 451.4 (except 451.49)
with code V26 (Power steering, EPS (FFO))

39

Install underfloor paneling

40

Perform wheel alignment check

When replacing the rack-and-pinion steering (1).

Model 451.3/4
with code V26 (Power steering, EPS (FFO))without recording the vehicle level

AR40.20-P-0200MCC

Model 451.3/4
with code V26 (Power steering, EPS (FFO))with recording the vehicle level

AR40.20-P-0200MCE

 Depending on the workshop equipment select between the measurement variant with recording the vehicle level or without recording the vehicle level.

 Front axle carrier

Number

Designation

MODEL 451.30/33/380/40/ 43/480

Model 451.390/392/490/492

BA33.10-P-1001-01D

Bolt, front-axle carrier to body

Nm

100

85

 Front axle carrier

Number

Designation

Model 451.391/491

BA33.10-P-1001-01D

Bolt, front-axle carrier to body

Nm

100

 Steering shaft

Number

Designation

Model 451.3/4

BA46.10-P-1001-01F

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

Nm

20

 Steering gear

Number

Designation

Model 451.3/4

BA46.20-P-1001-01G

Bolt, rack-and-pinion steering to front axle carrier

Stage 1

Nm

70

Stage 2

°

–

 Tie rod

Number

Designation

Model 451.3/4

BA46.40-P-1001-01F

Self-locking nut, tie rod to steering knuckle

Nm

34

Repair materials

Number

Designation

Order number

BR00.45-Z-1002-06A

Antifriction paste, rubber parts 2.5 kg, DBL 6867.00

A 000 989 01 60