Installing Hydraulic Pump (Cayenne Turbo/Cayenne S)

Information 

• In vehicles without Servotronic, the hydraulic system must be flushd with approx. two litres of Pentosin. 
• The hydraulic system must be bled following. →  WM 4800IN TEST AND ASSEMBLY WORK ON POWER STEERING (ALL MODELS)   The vehicle must be lowered onto the wheels for this. 
• Only use Pentosin CHF 202 to fill the hydraulic system. 
• Pay attention to the hydraulic fluid level. 
• Replace sealing rings. 
• When replacing the hydraulic pump observe the instructions in the Technical Information, Replacing servo pump: Group 4, No. 5/03. 
• Observe correct tightening torques  . → Tightening Torques 

1. Fit hydraulic pump. → Tightening torque: 23 Nm (17 ft lbs.) 
2. Fit pulley on the hydraulic pump and screw in the screws.
3. Fit drive belt in correct position and tension as required. → 137801 CHECKING DRIVE BELT
4. Tighten the pulley on hydraulic pump. → Tightening torque: 23 Nm (17 ft lbs.) 
5. Fit both hydraulic lines. → Tightening torque: 30 Nm (22 ft lbs.)+/-3 Nm (+/-2.0 ft lbs.)  → Tightening torque: 10 Nm (7.5 ft lbs.)  . Remove hose clamp 3094. 
6. Fit the pressure pipe on the turbocharger and on the charge air cooler. Connect positive crankcase ventilation pipe at the pressure pipe and at the hydraulic pump (not Cayenne S). Position heat shield.
7. Fit intake manifold on the turbocharger (not Cayenne S) and install air cleaner housing. → Installing air cleaner housing
8. Fit air box for throttle housing (Y-pipe). → Installing air box for throttle housing (intake pipe upstream of throttle valve)
9. Fit the air cleaner element and the cover for the air cleaner housing.
10. Fit intake manifold on cover for air cleaner housing.
11. Insert wheel housing liner. → Installing front wheel housing liner
12. Disconnect pressure pipe on the servo oil cooler (line leading to the hydraulic fluid tank). Have a suitable plug ready and close the line (emerging hydraulic fluid!). Collect emerging hydraulic fluid in a suitable container.
13. Fill the hydraulic fluid tank. Use a suitable auxiliary hose (approx. 10 - 15 cm, shop-made) to carry hydraulic fluid that emerges during flushing into a suitable container (approx. 1.5 litres).
14. Rinse the hydraulic system with the engine running by turning the steering several times to the right or left stop, and adjust the hydraulic fluid level several times as required. The vehicle must be lowered onto the wheels for this. The tank must not run empty while the engine is running (two workers required).
15. Fit the pressure pipe on the servo oil cooler.
16. Bleed the hydraulic system with the engine running by turning the steering several times to the right or left stop, and adjust the hydraulic fluid level several times as required. → WM 4800IN TEST AND ASSEMBLY WORK ON POWER STEERING (ALL MODELS)