Removing Hydraulic Pump

→ The engine must be run for approx. 20 seconds prior to the fluid level check. Multiple steering operations (maneuvering) will change the fluid level in the reservoir. Check the fluid level.

→ If coolant hoses come into contact with Pentosin, clean them thoroughly with water IMMEDIATELY.

→ Replace visibly swollen coolant hoses.

Information 

• The rack-and-pinion steering gear and power-steering pump must not be repaired or dismantled! 
• Always replace the O-rings on hydraulic lines! 
• Ensure absolute cleanliness at all times! 
• The steering system must be flushed after replacing individual or multiple components. Additional components must be replaced. →  489729 FLUSHING THE STEERING SYSTEM  
• The reservoirs must always be replaced if the hydraulic pump is replaced. 
• If system faults still occur after replacing a component (another component is faulty), the reservoir does not have to be replaced again. 
• Steel flexi-pipes must not be kinked or crushed. 

Information 

• Damage to the power steering will occur if there is not enough oil in the hydraulic system. Even small leaks can cause the hydraulic fluid to escape and damage the power-steering pump as a result of high oil pressure in the hydraulic circuit. 
• Grunt-like noises that can be heard when the steering is locked, or foam formation in the supply tank indicate a lack of oil and/or that air has also been sucked in. Before filling the supply tank, any existing leaks must be corrected and the defective part on the pressure side must be replaced. 

Information 

• The engine does not need to be removed to remove and install the hydraulic pump. 

Information 

• Cayenne Turbo only: Before removing the cover of the air cleaner box, the intake manifold of the turbocharger must be disengaged from the air cleaner housing. 
• Loosen the pulley of the hydraulic pump before removing the drive belt. 

Information 

• The pictures shown in this document may differ from the original. 
  Fig 1: Identifying Hydraulic Pump Installation Position

  Courtesy of PORSCHE CARS NORTH AMERICA, INC.

1. Turbo only: 

   Remove intake manifold from the air cleaner housing to the turbocharger.

   Remove the air cleaner cover on the Cayenne S.

2. To do this, turn the pins -arrows-  and pull them out. Then pull off the intake manifold.
   Fig 2: Removing Intake Manifold From Air Cleaner To Turbocharger

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
3. Turbo only: 

   Loosen the clamp -2-  and pull the check valve -1-  out of the air box.

   Fig 3: Identifying Valve For Positive Crankcase Ventilation

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
4. Turbo only: 

   Remove clamps -1, 2-  on the check valve.

   Fig 4: Removing Clamps

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
5. Turbo only: 

   Pull off hoses at the check valve. -arrows-  .

6. Turbo only: 

   Disconnect and pull off wastegate line at the clamp -1-  .

   Fig 5: Identifying Wastegate Line

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
7. Remove clamp -1-  from the lift switchover hose -2-  and pull off the hose -A-  .
   Fig 6: Removing Clamp From Lift Switchover Hose

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
8. Remove hose clamp -1-  on the turbocharger -2-  and pull off the hose -3-  (-A-  ).
   Fig 7: Removing Hose Clamp On Turbocharger

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
9. Loosen the fastening screws -1-  on the pulley -2-  for the hydraulic pump -3-  .
   Fig 8: Identifying Hydraulic Pump Pulley Screws

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.
10. Relieve and remove drive belt.

    To do this, use an open-ended wrench (a/f 30) to turn the belt tensioner clockwise -arrow-  and remove the drive belt from the tensioning roller -8-  . Then relieve the belt tensioner slowly.

    Fig 9: Removing Drive Belt

    Courtesy of PORSCHE CARS NORTH AMERICA, INC.
11. Remove the hydraulic pump pulley completely → Hydraulic pump pulley  .
12. Remove the intake pipe.

    Collect emerging hydraulic fluid in a suitable container.

    Close off the open connections for the lines and the hydraulic pump using suitable stoppers.

13. Disconnect the pressure pipe from the hydraulic pump.
14. Remove the fastening screws on the hydraulic pump.
15. Take the hydraulic pump out of the vehicle.