Installing Pump Unit

1. Pump unit
2. Wire harness
3. Hydraulic cylinder, left
4. Hydraulic line, short
5. Hydraulic cylinder, right
6. Hydraulic line, long
Fig 1: Overview Of Spoiler Drive (Pump Unit)
Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Information 

Observe allocation of hydraulic lines to pump chambers and their installation position.

The short hydraulic line -2-  goes to the upper pump chamber in the pump unit -1-  . The hydraulic line -2-  points to the center - in direction of bracket -6-  - and upwards -Arrow A-  .

The long hydraulic line -3-  goes to the lower pump chamber in the pump unit -1-  . The hydraulic line -3-  is routed along the pump unit -1-  towards the bottom left -Arrow B-  .

Fig 2: Locating Hydraulic Lines Of Pump Unit

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Information 

Counter at the hydraulic line with an open-ended wrench when tightening the banjo bolt.

1. Screw hydraulic lines onto the pump unit.
   1. 1.1. Fit short hydraulic line -2-  and long hydraulic line -3-  using the long banjo bolts -4-  and new sealing rings -5-  on the pump unit -1-  (-Arrow A-  ) and screw on securely -Arrow B-  . → Tightening torque: 15 Nm (11 ftlb.) 
   Fig 3: Installing Screw Of Hydraulic Lines On Pump Unit

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
2. Move pump motor out.
   1. 2.1. Move pump motor out until Pentosin emerges from the two hydraulic lines -2 and 3-  .

      To do this, connect the -wide contact-  to 8V (+) and the -narrow contact-  to ground (--).

   Fig 4: Moving Pump Motor
   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Fill hydraulic lines at the pump unit.
   1. 3.1. Dip the ends of the hydraulic lines -2 and 3-  fully into a container filled with Pentosin.
   2. 3.2. Move pump motor to its lower initial position.

      To do this, connect the -narrow contact-  to 12V (+) and the -wide contact-  to ground (--). The lower initial position is reached when the piston in the pump unit moves to the mechanical stop and the amperage rating exceeds 10A. The amperage is measured using the → digital multimeter Bosch MMD 302  .

   3. 3.3. To prevent Pentosin from running out of the hydraulic lines, -2 and 3-  , hold the hydraulic lines up straight after removing them from the container.
   Fig 5: Installing Hydraulic Lines At Pump Unit

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.