Removing Hydraulic Pump

WARNING: This page is about a different car, the 2014 Porsche Cayenne, 2013 Porsche Cayenne, 2012 Porsche Cayenne, and 2011 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.
1. The engine must be run for approx. 20 seconds prior to the fluid level check. Multiple steering operations (manoeuvring) will change the fluid level in the reservoir. Check the fluid level.
2. If coolant hoses come into contact with Pentosin, clean them thoroughly with water IMMEDIATELY.
3. 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.

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Installation position of hydraulic pump

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.

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Removing intake manifold from air cleaner to turbocharger (shown as an example)
Turbo only:
Loosen the clamp -2- and pull the check valve -1- out of the air box.

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Check valve for positive crankcase ventilation
Turbo only:
Remove clamps -1, 2- on the check valve.

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Removing clamps
Turbo only:
Pull off hoses at the check valve. -arrows- .
Turbo only:
Disconnect and pull off wastegate line at the clamp -1- .

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Wastegate line
Remove clamp -1- from the lift switchover hose -2- and pull off the hose -A- .

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Lift switchover clamp
Remove hose clamp -1- on the turbocharger -2- and pull off the hose -3- (-A- ).

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Turbo hose clamp
Loosen the fastening screws -1- on the pulley -2- for the hydraulic pump -3- .

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Hydraulic pump pulley
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.

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Removing drive belt
Remove the hydraulic pump pulley completely > Hydraulic pump pulley .
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.
Disconnect the pressure pipe from the hydraulic pump.
Remove the fastening screws on the hydraulic pump.
Take the hydraulic pump out of the vehicle.