Remove/install air suspension bellows on front axle

AR32.22-W-2013NA

Remove/install air suspension bellows on front axle

31.07.2017

Model

967

with code A1A (Front axle with air suspension)

Modification notes

06.02.2015

Work procedure completely revised.

1

Air suspension bellows

3

Nut

2

Compressed air connector

4

Bolts

 Warning

Risk of accident from vehicle starting off by itself when engine running. Risk of injury (bruises and burns) resulting from working on the engine while it is being started or when it is running.

Secure vehicle to prevent it from starting off by itself. Wear closed and snug-fitting work clothes. Do not touch hot or rotating parts.

AS00.00-Z-0005-01A

 Danger

Risk of death caused by vehicle slipping or toppling off during lifting

Only lift vehicle at the lift support points specified by the vehicle manufacturer.

AS00.00-Z-0032-01A

 Danger

Risk of death from lowering vehicle when working between wheels and body. Risk of injury from pinching or crushing when working on the air suspension.

Testing and repair work between the wheel and wheel arch or in the wheel well should only be performed if the vehicle is secured using suitable support fixtures to prevent it from lowering.
Adjustment operations should only be performed from underneath the vehicle.
Use only suitable support fixtures to secure the vehicle frame or vehicle axles in order to prevent them from lowering.
If necessary, additionally use suitable support fixtures in order to prevent other moving vehicle parts that are in the working area from lowering, or use suitable retaining devices to prevent these parts from moving suddenly and without warning.
Secure areas with moving vehicle parts against unauthorized access.

AS32.22-Z-0001-01A

Topical note

Special instructions for lifting and supporting vehicle

AH00.60-N-0100-01B



Remove

1

Secure vehicle at rear axle using wheel chocks to prevent it from rolling away.

2

Switch on ignition

3

Completely lower vehicle level at front axle using level control operating unit

 To depressurize the air suspension bellows on the front axle.

4

Switch off ignition

5

Remove compressed-air connector (2)

AR42.10-W-0900NA

6

Remove nut (3)

7

Remove screws/bolts (4)

8

Raise vehicle at front and jack up on frame

 Lift vehicle until there is a gap of approx. 70 mm between the compressed air connection on air suspension bellows (1) and the upper air suspension bellows support.

9

Remove air suspension bellows (1)


Do not apply mechanical force to the air suspension bellows (1) or plastic piston.
Otherwise, the air suspension bellows (1) or plastic piston may be damaged.



Install

10

Clean contact surfaces of air suspension bellows (1) on air suspension bellows carrier and on plate at top

11

Insert air suspension bellows (1)

 Do not pull the air suspension bellows (1) apart; the plastic piston must not protrude beyond the rubber bellows.

12

Install nut (3)

 Tighten nut (3) firstly by hand.

13

Lower and jack up front part of vehicle at frame approx. 30 mm

14

Install bolts (4)

 Bolt, bearing bracket air suspension bellows to front axle

*BA32.22-N-1003-03K

15

Tighten nut (3)

 Union nut, air suspension bellows to plate top

*BA32.22-N-1001-03K

16

Install compressed air connector (2)

AR42.10-W-0900NA



Check

17

Switch on ignition

18

Slightly raise vehicle at front axle using level control operating unit, and then lower again onto jack stands

 Only lower far enough until the vehicle is seated on the jack stands again. The air suspension bellows on the front axle must have pressure applied to them for the leak test.
If necessary, start the engine and completely fill the compressed air system at idle speed.

19

Switch off ignition

20

Check compressed air connector (2) for leaks

 Use commercially available leak detector spray.

21

Raise vehicle at front, remove jack stands and lower vehicle

22

Switch on ignition

23

Move vehicle to driving level using level control system operating unit

24

Switch off ignition

25

Remove wheel chocks from rear axle

 Air suspension

Number

Designation

Model 967

BA32.22-N-1001-03K

Union nut, air suspension bellows to plate top

Connection with plastic thread

Nm

25

Connection with metal thread

Nm

100

 Air suspension

Number

Designation

Model 967

BA32.22-N-1003-03K

Bolt, bearing bracket air suspension bellows to front axle

M20x1.5

Nm

500