Disassembling and Assembling Pump Unit

Disassembling and Assembling Pump Unit

System View:

NOTE: The hydraulic lines, banjo bolts and the sealing rings should always be replaced when replacing the hydraulic cylinder or the pump drive.


Removing Hydraulic Cylinder

Components:

Procedures 1 And 2:

CAUTION:
The drive module is pressurised!
==> Refer to "Safety instructions for the pump unit hydraulic system of the rear spoiler".

Procedures 3 And 4:

Filling the Hydraulic Cylinder





The hydraulic cylinder can only be filled in a retracted position.

1. Assemble hydraulic cylinder -2- vertically and fill with 5 ml Pentosin per hydraulic cylinder using a syringe. ==> Refer to "Tools and materials".

- Only Pentosin CHF US may be filled into the hydraulic cylinder. Quantity supplied 1 litre container. ==> Refer to "Tools and materials".


Installing Hydraulic Cylinder

Components:

Procedures:

Removing Pump

Components And Procedures:

Filling the Pump Unit





1. Fill the pump vertically using a syringe with 20 ml Pentosin per pump chamber. ==> Refer to "Tools and materials".
- Only Pentosin CHF US may be filled into the pump unit. Quantity supplied 1 litre container. ==> Refer to "Tools and materials".


Installing Pump

Components:

Procedures:

Bleeding the Pump Unit

Components:

Procedures:

Removing and Installing Wiring Harness

Removing Wiring Harness

Components:

Procedures:

Installing Wiring Harness

Components:

Procedures:

Removing and Installing Micro Switches For Rear Spoiler

NOTE:
- The rear spoiler is controlled via the instrument cluster.
- The micro switches can be checked with the Porsche System Tester.
- The micro switches are located on the right hydraulic cylinder.
- The operating principle of the micro switches differs (NO or NC contacts)

Removing Micro Switches





1. Unscrew fastening screws -2- for holder, micro switch -1- on the right hydraulic cylinder (4 screws) and remove holder.
2. Press the micro switch carefully out of the bracket using a screwdriver.





3. Open the protective sleeve of the wiring harness by a few centimeters and cut wiring of micro switch using a pair of side cutters.

Installing Micro Switches

1. Carefully push the new micro switch into the holder -1-. The micro switch with the blue lead at the bottom and the micro switch with the grey lead at the top.
2. The operating principle of the micro switches differs (NO or NC contacts)
3. Join wires using crimp connector and crimping tool. ==> Refer to "Tools and materials".
- Cut off lines to different lengths (due to the shrink connection).
- Slide shrink-fit hose over the leads.
- Strip 10 mm of insulation off the wires.
- Connect wires with crimp connectors (do not confuse colours of the individual wires).
- Shrink shrink-fit hoses with a hot-air gun. It is essential that all wires are watertight.
- Wrap commercially available PVC tape all around the area of the connection points.





4. Position holder with micro switch -1- on the hydraulic cylinder.
Fastening screws -2-, Tightening Torque: 0.5 Nm (0.5 ftlb.)


Troubleshooting






Tools and Materials