Remove/install the suspension strut

AR32.25-P-1017I

Remove/install the suspension strut

11.11.09

 

Remove/install

Danger!

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

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

AS00.00-Z-0010-01A



Notes on self-locking nuts and bolts

AH00.00-N-0001-01A



Notes on AIRmatic

AH32.22-P-1000-02I

1

Position wheels straight ahead

2

Empty suspension strut (40) affected using STAR DIAGNOSIS

STAR DIAGNOSIS diagnosis system

3

Unscrew pressure line connection (40a).

 Residual pressure in suspension strut up to 3.5 bar.

If the residual pressure valve (a) is damaged, replace the suspension strut (40).

 Plug the pressure line for the duration of the repair operations.

If pressure line connections or pressure lines are damaged: 

Repair AIRmatic pressure line connection

AR32.22-P-2001-02I

 Installation: Check pressure line O-ring and replace if necessary



*BA32.25-P-1003-04B

4

Unscrew nuts (40b) on front end

Installation: Fit nuts (40b) then refill suspension strut in fully-assembled vehicle before torquing to specification.



*BA32.25-P-1001-04B

5

Disconnect left front axle multiple circuit junction connector, major assembly compartment (X62/7) right front axle multiple circuit junction connector, major assembly compartment (X62/6)

 Connectors of damping valve unit and rpm sensor. Press against spring (arrow) to remove.

6

Remove bolts (40c) from spring strut (40)

 Installation: After installing, the bolts (40c) must close at least flush with the suspension strut (40) or be seated slightly lower in it.



*BA32.25-P-1002-04B

7

Slacken suspension strut (40) on ball joint of spring control arm (17) using a suitable lever.

 Check cup seal of ball joint in spring control arm (17) for damage, if necessary:

Replace spring control arm

AR33.15-P-0170I

8

Remove spring strut (40) downwards towards the side

 If replacing or reinstalling the spring struts (40), check condition of spring struts and if necessary:

AR32.25-P-1017-02I



Dispose of suspension strut.

OS32.25-P-0122-01I

 Installation: When installing tighten the upper nuts (40b) first.



*BA32.25-P-1001-04B

9

Install in the reverse order

10

Fill suspension struts (40) in question using STAR DIAGNOSIS

STAR DIAGNOSIS diagnosis system

 Pressurize to 5 bar.

 During filling the wheels must not contact the ground, as when filling in the deflected condition the air spring bellows in the suspension strut (40) is destroyed.

11

Check AIRmatic for leaks.

AR32.22-P-8100I

Number

Designation

Model
220.025/026/028/063/
065/067/070/073/074/
075/125/126/128/163/
165/167/170/173/174/
175/176/178/179

BA32.25-P-1001-04B

Nut, front suspension strut to front end

Nm

20

BA32.25-P-1002-04B

Bolt, front suspension strut to spring control arm

Nm

20

BA32.25-P-1003-04B

Air suspension pressure line to front suspension strut

Nm

5