Removing Hydraulic Pump (PDCC)

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2018 Porsche Cayenne, 2017 Porsche Cayenne, 2016 Porsche Cayenne, 2015 Porsche Cayenne, and 2014 Porsche Cayenne. However, it is still accessible from the selected car via links, so may be relevant.

CAUTION: Increased risk of accidents and material damage if too much Pentosin CHF 202 is filled in or if Pentosin CHF 202 comes into contact with the coolant hoses when filling or topping up.

It is possible to overfill the system, causing 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. 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.

Turbo only:
Remove intake manifold from the air cleaner housing to the turbocharger.

Remove the air cleaner cover on the Cayenne S.
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.
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.
Turbo only:
Remove clamps -1, 2- on the check valve.

Fig 4: Removing Clamps
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Turbo only:
Pull off hoses at the check valve. -arrows- .
Turbo only:
Disconnect and pull off wastegate line at the clamp -1- .

Fig 5: Identifying Wastegate Line Clamp
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
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.
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.
Loosen the fastening screws -1- on the pulley for the hydraulic pump -2- (-3- ).

Fig 8: Identifying Hydraulic Pump Pulley With Fastening Screws
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Relieve and remove the 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.
Remove the hydraulic pump pulley completely → Hydraulic pump pulley .
Remove the two intake pipes -1, 2- at the cylinder head -4- .

Fig 10: Identifying Intake Pipes And Cylinder Head
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 12.1. To do this, loosen the fastening screw -3- on the holder.
Pull the intake pipes -1, 2- out of the hydraulic pump -3- (-arrows- ).

Fig 11: Pulling Intake Pipes Out Of Hydraulic Pump
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 13.1. Loosen the fastening screw -4- on the holder at the hydraulic pump -3- .
2. 13.2. Lever out the two lines -1, 2- using a suitable tool -5- and remove them from the hydraulic pump -3- .
3. 13.3. Close off the open connections for the lines and the hydraulic pump using suitable stoppers.
4. 13.4. Collect emerging hydraulic fluid in a suitable container.
Disconnect the pressure lines from the hydraulic pump.

Fig 12: Disconnecting Pressure Lines
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
1. 14.1. Loosen the screw -1- on the lower pressure line and pull the line out of the hydraulic pump -A- .
2. 14.2. Loosen the banjo bolt -3- on the pressure supply tank -4- and pull it out -B- .
Unscrew the three fastening screws -2- at the front of the hydraulic pump.
Unscrew the fastening screw -3- at the side of the hydraulic pump.

Fig 13: Removing Fastening Screws On Hydraulic Pump
Courtesy of PORSCHE CARS NORTH AMERICA, INC.
Take the hydraulic pump out of the vehicle.