Filling the air-spring strut

→ Wear protective goggles with side eye protection.

→ Protect the point at which the compressed air emerges with suitable material.

→ Place the point at which the compressed air emerges on suitable surfaces.

Information 

• Do not remove air-spring strut from transport packaging until it has been filled. This will prevent damage to the inner bellows. 
• The air-spring strut must be screwed securely in the transport packaging during filling. 
• During assembly work, make sure that there are no pressure marks on the protective boot of the air-spring strut. 
• After installation, first set the high level, then go to normal level. Repeat this procedure once more. This procedure replaces most of the gas with the cleaned air from the air supply unit. 

1. Remove transport packaging lid.
2. Pull off protective cap on residual pressure retaining valve. Carefully remove any left-over packaging.
3. Pull off plug connection on residual pressure retaining valve (a/f 12) and screw on the filling unit adapter T10157/1  at the correct position on the residual pressure retaining valve.
   Fig 1: Identifying Residual Pressure Retaining Valve

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Information 

   • The air-spring strut must only be filled with the approved gasses, dual-process gasses Argon and Corgon. 
   • In isolated cases, up to 11 bar overpressure (upper tolerance, spring strut depressurised) is required to open the residual pressure retaining valve. 
   • Fill the air-spring strut using several individual pressure shots. Filling the air with individual pressure shots will prevent the air-spring strut from being filled with too much overpressure. 
   • Do not fill the air-spring strut with overpressure of more than 4.5 bar. 
   • The residual pressure retaining valve automatically reduces excessive overpressure to the minimum overpressure of approx. 3 bar. 
4. Fit the → see Fig 2 filling unit to the pressure gauge unit of the compressed air bottle.
   Fig 2: Identifying Pressure Gauge Unit Of Compressed Air Bottle

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Set the → see Fig 3 pressure gauge unit (flow limiter) to approx. 20 l/min -arrow-  .
   Fig 3: Identifying Pressure Gauge Unit (Flow Limiter)

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
6. Overcome the counter-pressure of the residual pressure retaining valve with several individual pressure shots and fill the air-spring strut. When sufficient air has been filled, between 2.5 and 4.5 bar -arrows-  , pull off the connection from the residual pressure retaining valve. Do not exceed the maximum value of 4.5 bar.
   Fig 4: Identifying Counter-Pressure Of Residual Pressure Retaining Valve

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Once the air-spring strut has been filled correctly, it can be removed from the transport packaging and fitted.