Air Spring Damper, Filling

Special tools, testers and auxiliary items required

Fig 1: Adapter T10157/1

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Adapter T10157

Fig 2: Air Spring Charging Unit VAS 6231

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Air spring filler unit VAS 6231
Steel gas bottle filled with argon or corgon

NOTE:

Air spring shock absorbers are supplied as replacement parts with a minimum pressure. By sitting in storage for extended periods this pressure can diminish (just like a tire). This minimum pressure must be checked and if necessary restored by recharging before air spring shock absorber is removed from the packaging. If air spring shock absorber is removed from the packaging without this checking/recharging, this may cause indentations or kinks to form in the dust boot before it reaches its normal shape. These indentations lead to preliminary damage and may lead to premature failure.

Remove cover from packaging.

Fig 3: Identifying Union Bolt

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Remove union bolt - arrow - from residual pressure holding valve.
Close valve of the steel gas bottle.
Become familiar with the relevant rules for the prevention of accidents for pressurized containers and technical gases.

Fig 4: Connecting Air Spring Filler Unit VAS 6231 And Adapter T10157/1

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Connect air spring filler unit VAS 6231 and adapter T10157 as shown in the illustration.

Air spring shock absorber in packaging
Steel gas bottle for argon, corgon with gauges
Air spring filler unit VAS 6231
Adapter T10157

Fig 5: Setting Flow Quantity Restrictor On Fitting To 2.0 L/Min

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Set flow rate limiter gauge to 2.0 L/min - arrow -.
Now fill gas into air spring shock absorber using several individual pressure bursts.

Fig 6: Identifying Pressure Indicator

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The display only shows a correct pressure if the oscillatory pressure of the residual pressure retaining valve is overcome. The oscillatory pressure is at approximately 3.5 bar. The air spring damper is filled with enough gas when the pressure reaches 3.5 to 4.5 bar.

Make sure pressure does not exceed 4.5 bar when filling.
Disconnect Air Suspension Strut Charger VAS 6231 from Adapter T10157 , gas escapes at pressure above 3.5 bar.

Minimum pressure is now reestablished. You can remove air spring damper from packaging.

After installation, first drive the vehicle at high ride height and then at normal ride height. Repeat this sequence once more.

By moving the ride height settings twice, the majority of the gas is exchanged with filtered air from the air supply motor.

Install air spring shock absorber → Installing under Air Spring Damper, Removing and Installing .