Removing and installing motor/pump unit

Special tools and workshop equipment required

• Drip tray - V.A.G 1306-
• Torque wrench - V.A.G 1331-
• Torque wrench - V.A.G 1332-
• Repairs must not be performed on the motor/pump unit
• If problems are reported, determine the cause by means of a function test, pressure test, leakage test and self-diagnosis.
• If a fault is found, the motor/pump unit must be renewed.
• Residual quantities of hydraulic fluid remain in the motor/pump unit and in the return and pressure lines after extracting.
• Do not re-use hydraulic fluid which has been drained off.
• Pressure and return lines must not be clamped off with hose clamps, e.g. -3094-, or other tools. Clamping can cause damage to the pressure line or return line.
• When bending or repositioning the pressure line or return line, make sure that the bending radius is not less than 100 mm to prevent damaging the lines.

Removing

• With ignition switched off, disconnect battery earth strap ⇒ Electrical system; Rep. gr. 27; Battery; Removing and installing battery.

Vehicles with air filter on left in engine compartment

• Remove battery and battery tray ⇒ Electrical system; Rep. gr. 27; Battery; Removing and installing battery.

Continued for all vehicles

• Unscrew cap -1- from motor/pump unit -2-.
• Draw off as much hydraulic fluid as possible from motor/pump unit using a suction bottle.
• Remove left front wheel.
• Remove front left wheel housing liner ⇒ General body repairs, exterior; Rep. gr. 66; Wheel housing liner; Removing and installing front wheel housing liner.
• Remove noise insulation.

• Open spacer -arrow A-.
• Remove pressure and return line -1- and -2- from spacer.
• Take out line -3- for power steering sensor - G250- from spacer.

Vehicles with air conditioning system

• Remove radiator fan control unit - J293- -1- from longitudinal member -arrows-.

Continued for all vehicles

• Open spring-type clip on return line -1-, and pull return line off fitting on motor/pump unit.
• Unscrew pressure line -2- from motor/pump unit -3-.
• Close off threaded bore on motor/pump unit e.g. with plastic sealing plug.
• Close off pressure line, return line and connection piece on motor/pump unit with a plastic bag and adhesive tape.
• Unscrew bolts -arrows -, and slightly lower motor/pump unit with bracket.

• Pull connectors -1-, -2- and -3- off motor/pump unit -4-.
• Remove motor/pump unit with bracket.

Installing

• Use new sealing rings for hose/line connections.
• Ensure sealing surfaces are clean.

Install in reverse order.

Vehicles with air filter on left in engine compartment

• Install battery and battery tray ⇒ Electrical system; Rep. gr. 27; Battery; Removing and installing battery.

Continued for all vehicles

• Connect earth strap of battery ⇒ Electrical system; Rep. gr. 27; Battery; Removing and installing battery.
• Use a hose (approx. 400…500 mm long) and a funnel to fill up with fresh hydraulic fluid.
• Use hydraulic fluid - G 004 000 M2-.
• Bleed steering system ⇒ 7 Bleeding steering system, checking for leaks and checking fluid level.
• Check hydraulic fluid level ⇒ 7.3 Checking hydraulic fluid level of power steering.
• Install front left wheel and tighten bolts or nuts ⇒ 2 Specified torques for wheel bolts.

Specified torques