Installing Hydraulic Pump

Information 

• The reservoir must always be replaced if individual or multiple components, such as the hydraulic pump (tandem hydraulic pump), steering, PDCC valve blocks (FA/RA), PDCC anti-roll bars (FA/RA), are replaced. 
• The hydraulic system must be bled after repair work is carried out. The vehicle must be lowered onto the wheels for this.  → 4890IN TEST AND ASSEMBLY WORK ON POWER STEERING 
• Only use Pentosin CHF 11S to fill the hydraulic system. 
• Check the hydraulic fluid level. 
• Replace sealing rings. 
• Observe specified tightening torques.  → 4X00IN TIGHTENING TORQUES FOR STEERING  . 
• Make sure not to damage the cooling fin. 

1. Carefully fit the hydraulic pump from the side.
2. Carefully fit the three fastening screws -2-  at the front Tightening torque 23 Nm (17 ftlb.)  and the fastening screw -3-  at the side Tightening torque 23 Nm (17 ftlb.)  of the hydraulic pump and then tighten all screws to the specified tightening torque.
   Fig 1: Installing Fastening Screws On Hydraulic Pump

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3. Fit the pressure and intake lines to the hydraulic pump. Insert the intake lines into the hydraulic pump, position the holder -6-  and screw in the fastening nut -5-  .
   Fig 2: Installing Hydraulic Pump Lines

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4. Secure the air-conditioning compressor. → Installing Air-Conditioning Compressor
5. Fit the support for the hydraulic line to the air-conditioning compressor.
6. Fit the lower charge air line (in the left wheel housing) together with the positive crankcase ventilation hose. To do this, pull the complete vent line in the assembly through in an upward direction. → Fitting charge air line at the bottom left 

   → 1052IN INFORMATION ON POSITIVE CRANKCASE VENTILATION (FULL-THROTTLE VENTILATION) TURBO

   Fig 3: Fitting Charge Air Line At Bottom Left

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7. Fit the lower left pressure hose. → Fitting lower pressure hose 
   Fig 4: Fitting Lower Pressure Hose

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8. Position the pulley and screw in the fastening screws -1-  .
9. Fit drive belt. → Installing Drive Belt
10. Tighten the fastening screws -1-  for the pulley to the hydraulic pump to the specified torque. Tightening torque 25 Nm (19 ftlb.) 
    Fig 5: Installing Pulley

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11. Clip the water hose into the bracket.
12. Clip in the positive crankcase ventilation line -3-  on the left, beside the throttle valve, underneath the engine cover (design cover).
    Fig 6: Fitting Positive Crankcase Ventilation

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13. Fit left charge air line between the charge-air cooler and air box for the throttle valve. → Fitting charge air line on the left 
    Fig 7: Fitting Charge Air Line On Left

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