Installing vacuum line

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Fit a new retaining clip -4- at the correct position -see Fig 1- on the new vacuum line -1- . Use the correct vacuum line -1-

Fig 1: Identifying Retaining Clip And Vacuum Line
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Fit new vacuum line -1- (feed it from the engine compartment towards the tandem pump). Do not pull the protection cap off the new vacuum line -1- (at the connection point to the tandem pump) yet (danger of soiling). Observe the installation position between the various hoses and lines!

Fig 2: Identifying Vacuum Line Connections
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
1. 2.1. Fit the vacuum line -1- into the plug-in coupling on the vacuum line on the vehicle side in area -2- . Fit retainer -2a- .
2. 2.2. Check that adapter -2b- - if one is fitted - is at the correct position (installation position). A hose piece is often used instead of the adapter -2b- .
  The following applies if the adapter -2b- is fitted:
  
  The adapter -2b- is fitted correctly in the connection and is at the correct installation position if both longitudinal bars on the adapter -2b- (can be checked both visually and by touch) are located on the side of the thin vacuum hose.
  
  If not installed at the correct position, pull the adapter -2b- out of the thin vacuum line, turn it around and slide it on to the thin vacuum line with the longitudinal bar side first.
  
  Fig 3: Identifying Position Of Adapter
  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
  
  Information
  
  Make sure to counter strongly when pulling the adapter off the vacuum line because otherwise the vacuum line can become detached from the change-over valve. Do not kink or pull the vacuum line.
3. 2.3. Insert adapter -2b- or hose piece (if no adapter -2b- is used) into the vacuum line -1- .
  
  Fig 4: Identifying Vacuum Line Connections
  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
Raise the lifting platform. Fit vacuum line correctly at the tandem pump. Replace the two micro-encapsulated (self-locking) fastening screws -5 and 6- whenever they have been loosened.
1. 5 - Short M6 x 10 Torx screw (blue)
2. 6 - Long M6 x 16 Torx screw (red)
  
  Fig 5: Identifying Vacuum Line At Tandem Pump
  Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.
1. 3.1. Pull protection cap off the new vacuum line. Coat O-ring lightly with engine oil and insert new vacuum line -1- into the tandem pump.
  CAUTION: Risk of damaging O-rings!
2. 3.2. Screw in new micro-encapsulated (self-locking) fastening screws -5 and 6- and tighten to 10 Nm (7.5 ftlb.). Counter at the hexagon on the combination screw behind it (behind the holder) when tightening the Torx screw -5- . You only need to counter if a combination screw is fitted under the holder (introduced only in the current model series). Observe position (fastening point) for short screw -5- and long screw -6- .
Secure vacuum line -1- to the combination holder -3- .
Clip line into the retaining clip -4- .

Fig 6: Identifying Vacuum Line Connections
Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.