Bleeding PDCC

Information 

Overfilling the system can cause Pentosin CHF 202 to overflow onto coolant hoses and other components. The engine must be run for approx. 20 seconds prior to the fluid level check. Check the fluid level.

Information 

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Markings on dipstick (example)

• The reservoir must always be replaced if individual or multiple components, such as the tandem pump, valve blocks (FA/RA), anti-roll bars (FA/RA) are replaced! 
• If system faults still occur after replacing a component (another component is defective), the reservoir does not have to be replaced again! 
• Only Pentosin CHF 202 may be used in the reservoir. The part number for Pentosin can be found in the Porsche Spare Parts Information. 
• The reservoir must not be sucked dry! This is likely to damage the tandem pump and contaminate the system. 
• The reservoir cap has a dipstick with a -MIN/MAX marking- . The markings are for a fluid level when the engine is cold (approx. 20°C)! 

Fig 1: PDCC Reservoir Components Location

Courtesy of PORSCHE CARS NORTH AMERICA, INC.

Installation position of PDCC reservoir

1. Open the PDCC reservoir -1-  .

   >4303AW SAFETY REQUIREMENTS FOR PORSCHE DYNAMIC CHASSIS CONTROL (PDCC) 

2. Fill the reservoir with Pentosin until the fluid level remains fixed.
3. Briefly start the engine, let it run for approx. 1 second and add Pentosin again. During this process, the fluid level in the reservoir may drop quickly. This depends on the quantity of oil required. Therefore, always top up with Pentosin. Repeat this process several times. If the fluid level in the reservoir does not fall any further when the engine is briefly turned over, start the engine again and let it run at idle speed.
4. Check the fluid level several times at idle speed. If the fluid level is still dropping, keep topping up until the fluid level remains constant in the reservoir. If the oil level drops to the bottom of the tank, or if several air bubbles rise to the surface and/or a significant amount of foam forms in the reservoir, air is still present in the hydraulic system. It is quite normal for a few air bubbles to appear in the reservoir immediately after topping up.
5. Switch off the engine and set the correct fluid level. The fluid level must be between the -MIN/MAX marking-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Markings on dipstick (example)

6. After completing assembly, move the vehicle into an open area to bleed it.

   >4303AW SAFETY REQUIREMENTS FOR PORSCHE DYNAMIC CHASSIS CONTROL (PDCC) 

7. Close the doors and lids. Connect the PIWIS Tester to the vehicle.
8. One worker should sit in the vehicle and select >>PDCC<<>>Maintenance/repairs<<>>Control unit start-up<< in the control unit search on the Porsche System Tester. This includes bleeding and the worker is guided through the menu. The vehicle body will roll to a significant degree. The 2nd worker must ensure complete safety around the vehicle!
9. Repeat the bleeding process twice. Then open the engine compartment lid and reservoir. Check the fluid level and hydraulic fluid when the engine is running and top up with the required amount of oil. The fluid level must not drop anymore and only a few air bubbles should circulate. There must be a significant reduction in the amount of air bubbles and/or foam formation.
10. Switch off the engine and set the correct fluid level. The fluid level must be between the -MIN/MAX marking-  .
11. If this is not the case, the bleeding process must be repeated. If the fluid level continues to drop, the system must be visually inspected for any signs of leaks! Repeat the bleeding process following repairs.