Suspension Strut, Filling

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2015 Audi S7, 2015 Audi A7 Quattro, 2014 Audi S7, 2014 Audi A7 Quattro, and 2013 Audi S7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

The procedure refers to the air spring damper.

Special Tools And Workshop Equipment Required

Air Spring Strut Adapter T10157
Air Suspension Strut Charger 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 folds can cause damage and premature failure of the air spring damper.

-- Remove the cover from the packaging.

-- Remove union bolt -arrow- from the residual pressure retaining valve.

Fig 1: Identifying Union Bolt

Courtesy of AUDI OF AMERICA, LLC

-- 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.

Fig 2: Connecting Air Suspension Strut Charger VAS 6231 And Adapter T10157/1

Courtesy of AUDI OF AMERICA, LLC

Air spring shock absorber in packaging
Steel gas bottle for argon, corgon with gauges
Air Suspension Strut Charger VAS 6231
Air Spring Strut Adapter T10157

NOTE:

Refilling the suspension strut (air suspension) may only be performed with the gases from the top to prevent any "uncleaned" air from getting into the air suspension system.

-- Set flow rate limiter gauge to 2.0 liters/min -arrow-.

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

Courtesy of AUDI OF AMERICA, LLC

-- Now fill gas into air spring shock absorber approximately up to 5 bar (72.5 psi) using several individual pressure bursts.

Fig 4: Identifying Pressure Indicator

Courtesy of AUDI OF AMERICA, LLC

-- 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 (50.7 psi).

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

-- Install the air spring shock absorber, refer to Installing .