Remove/install front axle carrier

AR33.10-P-0001V

Remove/install front axle carrier

23.4.12

 

Remove/install

 Danger!

Risk of injury to skin or eyes caused by hydraulic fluid spraying out under high pressure. Risk of poisoning caused by swallowing hydraulic fluid

Depressurize hydraulic system completely before starting any work on system. Wear protective clothing and safety glasses.

AS00.00-Z-0013-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A

 Installation: Bolts and nuts on suspension components must not be tightened until the vehicle and its wheels are on the ground, and it is in a ready-to-drive condition.

1

Deactivate easy entry/exit function for driver seat and steering wheel

Model 171 with code (275) Memory package (driver seat, steering column, mirrors)

AR54.30-P-1000-02EDV

Model 172 with code (275) Memory package for electrically adjustable front seats

AR54.30-P-1000-02W

 Easy entry/exit function for driver seat and steering wheel must be deactivated. Otherwise the steering wheel moves to a different position if, e.g. the driver door is opened or closed. The headliner or windshield may then be damaged when the  holding device is installed.

2

Turn steering wheel to center position (front wheels in straight-ahead position) and fix in place with clamping device

 The steering wheel
must not be turned when the steering coupling (8) has been detached. Otherwise the clock spring contact will be destroyed.

 Holding device

*129589012100

3

Open engine hood and move to vertical position

Model 171.4, 172.4

AR88.40-P-1000V

4

Remove front upper engine cover

Model 171 with engine 113, 272

Model 172 with engine 276, 651

5

Extract oil from power steering expansion reservoir

 The area surrounding the separation point should be cleaned thoroughly before opening the hydraulic system. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system.

 Hand pump

*210589007100

6

Remove air filter housing

Model 171.473 with engine 113.989

AR09.10-P-1150AC

Model 172.4 with engine 152.9

AR09.10-P-1150MMI

7

Mount engine hoist

Model 171, 172 with engine 271
Model 171 with engine 113

AR33.10-P-0100-01V

Model 171 with engine 272
model 172 with engine 152, 276, 651

AR33.10-P-0100-01VA

 Engine hoist

*240589006100

8

Raise engine far enough until the
engine mounts (7) are relieved

9

Remove both front wheels

AP40.10-P-4050V

10.1

Remove lower engine compartment paneling

 Installation: Only install engine compartment paneling after leak check on the rack-and-pinion steering (15).

Model 171.4

AR61.20-P-1105V

Model 172.4 with gasoline engine

AR61.20-P-1105W

10.2

Remove lower bottom sections of soundproofing

Model 172.4 with diesel engine

AR94.30-P-5300W

11

Remove underfloor paneling (4)

Model 171

AR61.30-P-1001V

12

Remove diagonal struts (3)



*BA61.10-P-1006-01A

13

Remove bolt (11) of retaining plate (12)



*BA46.20-P-1001-01F

14

Remove retaining plate (12) of oil lines from the rack-and-pinion steering (15)

 Installation: Replace sealing rings.

15

Pull oil lines out of the
rack-and-pinion steering (15) and place to one side

 The area surrounding the separation point should be cleaned thoroughly before opening the hydraulic system. Even the smallest dirt particles, introduced into the hydraulic components, can lead to malfunctions and a total failure of the hydraulic system.

 Collect escaping hydraulic fluid in a container and seal connections with stop plugs.

 Installation: Install new sealing rings.

 Set of stop plugs

*129589009100

16

Detach electrical connection from SPS solenoid valve (Y10) or direct steering solenoid valve (Y10)

Model 171 with code (213) Speed-sensitive power steering),
Model 172 with code (213) Direct steering

17

Remove cable tie on left underside of front axle carrier (1) and place electrical line to
SPS solenoid valve (Y10) or direct steering solenoid valve (Y10) to one side

Model 171 with code (213) Speed-sensitive power steering),
Model 172 with code (213) Direct steering

18

Pry off tie rods (9) on left and rights steering knuckle

Model 171

AR46.40-P-0200-01V



*BA46.40-P-1001-01E

 Thrust piece

*140589006300

 Puller

*124589033300

Model 172

AR46.40-P-0200-02CW



*BA46.40-P-1001-01E

 Thrust piece

*171589003400

 Puller

*221589003300

19

Remove bolts (17) and heat shield (16)

Model 171 with engine 113

Model 172 with engine 152, 276, 651

20

Detach steering coupling (8) from upper steering shaft

AR46.10-P-8000V

21

Detach left and right torque strut (13) from front axle carrier (1)

 When unfastening the nut, always counterhold the bolt so that it does not turn. Otherwise the fixing lugs for the caster adjustment in the rubber mount will be sheared off when the repair kit is fitted.

 On model 171 with engine 113 remove right bolt of strut rod (13) when the front axle carrier is lowered (1).

 Model 171

*BA33.20-P-1007-01E

 Model 171

*BA33.20-P-1015-01E

 Model 172

*BA33.20-P-1002-01Q

 Model 172

*BA33.20-P-1003-01Q

 Box wrench bit (model 171)

*211589000300

22

Detach left and right cross strut (14) from front axle carrier (1)

 When unfastening the nut, always counterhold the bolt so that it does not turn. Otherwise the fixing lugs for the camber adjustment in the rubber mount will be sheared off when the repair kit is fitted.

 Model 171

*BA33.20-P-1006-01E

 Model 171

*BA33.20-P-1014-01E

 Model 172

*BA33.20-P-1005-01Q

 Model 172

*BA33.20-P-1006-01Q

 Box wrench bit (model 171)

*211589000300

23

Detach bracket for oil line (6) of rack-and-pinion steering (15) from front axle carrier (1)

 Model 171

*BA46.30-P-1014-01D

 Model 172

*BA46.30-P-1015-01R

24

Remove bolts (10) from engine mount (7)

 Model 171 with engine 271, 272

*BA22.10-P-1006-01O

 Model 171 with engine 113

*BA22.10-P-1001-01S

 Model 172

*BA22.10-P-1002-03E

25

Support and secure the front subframe (1) with the transmission jack and transmission plate

Transmission jack

gotis://H_00.10_01.0

Transmission platform

gotis://A_25/35/49_02.0

AR33.10-P-0100-03V

26

Unscrew bolts (2) of front-axle carrier (1)

 These bolts (2) are self-tapping bolts. Bolts (2) must not be removed using an impact wrench. Otherwise the thread in the longitudinal member may be damaged.



*BA33.10-P-1005-01A



Notes on bolted connections with self tapping screws

AH00.00-P-0007-01SF

27

Pull the left and right front axle halves outwards and lower the front axle carrier (1) uniformly

 Make sure that the front axle carrier (1) does not tilt out of the guide (5) when lowering.

28

Check front axle carrier (1) for signs of damage, and replace front axle carrier (1) if necessary

29

Detach rack-and-pinion steering (15) from front axle carrier (1)

 When replacing

front axle carrier (1).

AR46.20-P-0600V

30

Install in the reverse order

31

Fill power steering pump and bleed

AR46.30-P-0010V

32

Check oil level in expansion reservoir of power steering and correct if necessary

AP46.00-P-4611V

33

Perform wheel alignment check

Model 171

AR40.20-P-0200V

Model 172

AR40.20-P-0200EW

Number

Designation

Engine
271 in model 171

Engine
272 in model 171

BA22.10-P-1006-01O

Bolt, front engine mount to front axle carrier

Nm

35

35

Number

Designation

Model
172

BA22.10-P-1002-03E

Bolt, front engine mount to front axle carrier

Nm

35

Number

Designation

Engine
113.989 in model 171

BA22.10-P-1001-01S

Bolt, front engine mount to front axle carrier

Nm

35

Number

Designation

Model
171

Model
172

BA33.10-P-1005-01A

Bolt, front axle carrier to longitudinal member

Nm

80

120

Number

Designation

Model 171

BA33.20-P-1006-01E

Self-locking nut for cross strut on front axle carrier

Stage 1

Nm

80

Stage 2

°

120

BA33.20-P-1007-01E

Self-locking nut, torque strut to front axle carrier

Stage 1

Nm

80

Stage 2

°

120

BA33.20-P-1014-01E

Self-locking nut (repair kit) cross strut to front axle carrier

M1411510.9

Stage 1

Nm

80

Stage 2

°

120

M1412011.9

Stage 1

Nm

100

Stage 2

°

180

BA33.20-P-1015-01E

Self-locking nut (repair kit) strut rod to front axle carrier

M1411510.9

Stage 1

Nm

80

Stage 2

°

120

M1412011.9

Stage 1

Nm

100

Stage 2

°

180

Number

Designation

Model
172

BA33.20-P-1002-01Q

Self-locking nut, torque strut to front axle carrier

Stage 1

Nm

120

Stage 2

°

180

BA33.20-P-1003-01Q

Self-locking nut (repair kit) strut rod to front axle carrier

Stage 1

M1412011.9

Nm

100

Stage 2

°

180

BA33.20-P-1005-01Q

Self-locking nut for cross strut on front axle carrier

Stage 1

Nm

120

Stage 2

°

180

BA33.20-P-1006-01Q

Self-locking nut (repair kit) cross strut to front axle carrier

Stage 1

M1412011.9

Nm

100

Stage 2

°

180

Number

Designation

Model
171

Model
172

BA46.20-P-1001-01F

Bolt, oil line retaining plate to rack-and-pinion steering

Nm

18

18

Number

Designation

Model
171 with engine
113

Model 171
with engine
271

Model 171
with engine
272

BA46.30-P-1014-01D

Bolt, power steering oil line to front axle carrier

Nm

9

9

9

Number

Designation

Model
172
without engine 152

Model
172 with
engine 152

BA46.30-P-1015-01R

Bolt, high-pressure hose to major assembly carrier

Nm

10

-

Number

Designation

Model 171

Model
172

BA46.40-P-1001-01E

Self-locking nut, tie rod to steering knuckle

Stage 1

Nm

50

50

Stage 2

°

60

60

Number

Designation

Model 171

Model
172

BA61.10-P-1006-01A

Self-locking bolt, front diagonal strut to frame floor or front axle carrier

Nm

60

60