Removing Hydraulic Pump

Information 

• The engine does not need to be removed to remove and install the hydraulic pump. 
  Fig 1: Identifying Hydraulic Pump V8 PDCC

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1. Pull the cover of the throttle body up and off.
   Fig 2: Pulling Cover Of Throttle Body

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2. Remove air box for throttle housing (Y-pipe). → Removing air box for throttle housing (intake pipe upstream of throttle valve)

   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. 
3. Remove the left air cleaner housing → Removing air cleaner housing . To do this, follow Steps 4 and  5-air path on Cayenne Turbo (left side)-  . Steps  5 to  11 are not relevant for the Cayenne S.
   Fig 3: Identifying Air Cleaner Housing

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4. Disconnect intake manifold at the air cleaner cover. Remove the air cleaner cover on the Cayenne S.
   Fig 4: Locating Air Cleaner Cover

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5. To do this, turn the -pins 180°-  and pull them out. Then pull off the intake manifolds.
   Fig 5: Turning Intake Manifolds Pins 180

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6. Once the lid is removed, remove the intake manifold completely along with the clamp. To do so, disconnect the positive crankcase ventilation pipe at the pressure pipe and at the hydraulic pump (clamp locks).
   Fig 6: Locating Pressure Pipe And Hydraulic Pump

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7. Separate the pressure pipe at the turbocharger and at the charge air cooler from below (engine guard removed).
   Fig 7: Locating Pressure Pipe At Turbocharger

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8. Loosen the pulley on the hydraulic pump. Do so by slackening the drive belt Fig 8 and set it aside. → Checking drive belt
   Fig 8: Loosening Hydraulic Pump Pulley

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9. Remove pulley on hydraulic pump completely.
10. Loosen the hydraulic lines at the pump slightly, but do not remove them.
11. Remove the hydraulic pump (front Torx E12) and let it hang.

    Information 

    The line -2- can only be removed/fitted if the hydraulic pump is raised slightly (approx. 3mm).

    Fig 9: Locating Hydraulic Pump Connections

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12. Remove the line connections -1 and 3-  . Only loosen the line connection -2-  . Close the open connections using suitable and clean (!) plugs. Collect emerging hydraulic fluid in a suitable container. Raise the hydraulic pump slightly, pull the line -2-  carefully down and out, and then seal it.
13. Remove the hydraulic pump.