AR32.22-P-1500-03TX Fill the Air Spring In Vehicle Riding Height Position

AR32.22-P-1500-03TX Fill the air spring in vehicle riding height position
- with CODE (489) Airmatic (semi-active air suspension)

Special Tools:

Suspension struts

Suspension struts:

Component Identification:

1 Screw compressed-air connection (12) onto the compressed-air distributor (11) of the rear axle [Nm]

Component Identification:

The bolted connection (1) of the air spring (2) on the spring control arm (3) must be loose. The left and right air springs (2) must each be filled separately.

2 Prefill air spring (2) to a maximum of 0.5 bar by means of STAR DIAGNOSIS: compressor running time or filling time approx. 2 seconds.
3 Position telescopic lifter (4) at the spring control arm (3).

Component Identification:

4 Measure angle of rear axle shaft (65) using electronic inclinometer.

The connecting cable (086b) from the sensor (086a) must point towards the center of the vehicle otherwise an incorrect measurement ensues. The test points on the rear axle shaft (65) must be cleaned.

5 Raise spring control arm using transmission lifter until the rear axle shaft (65) has reached the specified value in the vehicle riding height position. Specified value in design level: -1.2 degrees.
6 Fill the air spring to a medium pressure (2 bar) using STAR DIAGNOSIS.

Compressor running time/filling time approx. 10 s.

Component Identification:

7 Check the alignment of the air spring (2) in the vehicle riding height position.

The air spring (2) must be straight and parallel to the shock absorber (5). Check dimensions (b, c). When the air spring (2) is kinked, release all pressure, lower spring control arm using telescopic lifter, straighten air spring (2) and start inflating attempt again.

The folds in the protective boot (6) must be correctly formed and must not have any dents (arrow), otherwise cracks can develop at the kinks. Remove dents by hand if necessary.
The protective boot (6) of the air spring (2) must be free to move and as able to be lifted upwards off the inflated air spring bellows.

Component Identification:

8 Tighten the bolted connection of the air spring (2) at the spring control arm (3) in the vehicle riding height position
9 Lower spring control arm (3) using telescopic lifter (4).
10 Fill the air spring (2) to a pressure of 5 bar using STAR DIAGNOSIS.
Compressor running time/filling time approx. 20 s.

Component Identification:

11 Check the alignment of the air spring (2) at full rebound travel:
The folds in the protective boot (6) must be correctly formed and must not have any dents, otherwise cracks can develop at the kinks. Remove dents by hand if necessary.

The air spring (2) forms a gentle curve relative to the damper (5). The protective boot (6) should not be in contact with the damper (5), and the inner air spring bellows should not press against the damper (5). The protective boot (6) of the air spring (2) must move freely and be able to be raised by the inflated air spring bellows.
12 Read out the diagnostic trouble code memory using STAR DIAGNOSIS and erase if necessary.