Suspension Strut, Filling

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NOTE:

Air springs 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 the air spring is removed from the packaging. If air spring 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 folds can cause damage and premature failure of the air spring.

Special tools and workshop equipment required

Air Suspension Strut Charger:VAS 6231

Fig 1: Air Spring Charging Unit VAS 6231
Courtesy of AUDI
Air Spring Strut Adapter:T10157

Fig 2: Adapter T10157/1
Courtesy of AUDI
Steel gas bottle filled with argon or corgon

Procedure

Courtesy of AUDI

-- Remove the plug -arrow- from the residual pressure retaining valve.

-- Close the valve of the steel gas bottle.

-- Become familiar with the relevant rules for the prevention of accidents for pressurized containers and technical gases.

-- Connect the Air Suspension Strut Charger:VAS 6231 and Air Spring Strut Adapter:T10157 as shown.

Courtesy of AUDI

Air Spring in the Packaging.
Steel Gas Bottle for Argon, Corgon with Fitting

NOTE:

>>Refilling<< the air spring may only be performed with the gases from the top to prevent any "uncleaned" air from getting into the air suspension system.

-- Set the flow rate limiter on the fitting to 2.0 L/min -arrow-.

Fig 3: Setting Flow Quantity Restrictor On Fitting To 2.0 L/Min

Courtesy of AUDI

-- Fill the air spring fill the gas into air spring damper approximately to 5.0 bar (72.52 psi).

Fig 4: Identifying Pressure Indicator

Courtesy of AUDI

-- Disconnect the Air Suspension Strut Charger:VAS 6231 from the Air Spring Strut Adapter:T10157 . When doing this, gas will escape at a pressure greater than 3.5 bar (50.76 psi).

Minimum pressure is now reestablished. The air spring can be removed from the packaging.

-- After installation, first drive the vehicle at high ride height and then at normal ride height.

-- Repeat the procedure.

NOTE:

By moving the vehicle lever heights twice, the majority of the gas is exchanged with filtered and dried air from the air supply motor.

-- Install the air spring. Refer to Installing .