Audi Workshop Service and Repair Manuals

Removing and installing power steering pump (vehicles with 4-cylinder TFSI engine, vehicles with dynamic steering) Removing and installing power steering pump (vehicles with 4-cylinder TFSI engine, vehicles with dynamic steering) → Anchor Exploded view of power steering pump (vehicles with dynamic steering)

t	Renew seals.

t	Do not re-use hydraulic fluid which has been drained off.

t	Use only hydraulic fluid.

1 -

Bracket

2 -

Sleeve

q	Sleeve must be driven back slightly to install power steering pump

3 -

Bolt

q

25 Nm

4 -

Union nut

q

38 Nm

5 -	Pressure line

Caution Fully insert pressure line when installing.

q	Note correct position: Angle between pipe connection and shaft of power steering pump is approx. 72°

6 -

Seal

q	Always renew if removed

7 -	Suction hose

q	Marking „P“-arrow- on suction hose must be in line with seam -arrow- on power steering pump.

8 -

Hose clip

q	Tighten using hose clip pliers -V.A.G 1275-

q	Always renew if removed

9 -	Power steering pump

q	For correct version refer to → Electronic parts catalogue

q	Fill with hydraulic fluid before installing

q	Checking delivery pressure → Chapter

q	Removing and installing → Anchor

q	Bleeding steering system → Chapter

q	Checking hydraulic fluid level → Chapter

q	Checking steering system for leaks → Chapter

10 -

Bolt

q

25 Nm

Removing Special tools and workshop equipment required

t  Hose clamps up to 25 mm Ø -3094-

t  Hose clip pliers -V.A.G 1275-

t  Torque wrench -V.A.G 1331-

t  Tool insert (17 mm) -V.A.G 1331/6-

t  Used oil collection and extraction unit -V.A.G 1782-

t  Drip tray for workshop hoist -VAS 6208- t  Engine bung set -VAS 6122- General notes There is no provision for repairing the power steering pump. If problems are reported, trace the fault by means of a pressure test and a leakage test. Renew the power steering pump if there is a fault. t  Always check steering system for leaks if fluid level is low in reservoir. t  If leakage is visible at the pipe connections first tighten connections and wipe dry, then check for leaks again. t  The power steering pump is supplied without fluid filling. Prior to installation, the pump must therefore always be filled with hydraulic fluid and turned by hand. Otherwise, there is a possibility of pump damage or noise while driving. –  Raise vehicle on lifting platform. –  Lift off engine cover panel.   Note Before removing poly V-belt, mark direction of rotation. A used belt can break if it runs in the opposite direction. Ensure that the belt is properly seated in the pulleys when installing. –  Detach poly V-belt → Rep. gr.13. –  Remove poly V-belt only from power steering pump pulley. –  Extract hydraulic fluid from reservoir with used oil collection and extraction unit -V.A.G 1782-.

–  Clamp off suction hose -1- and return hose -2- using hose clamps -3094-.   Caution l  Hose clamps up to Ø 25 mm  -3094- must not be applied at any point near the non-return valve in the return hose -2-. The non-return valve will otherwise be damaged. l  The non-return valve is located in the return hose -2- between the hose clips -arrows-. –  Remove noise insulation → Rep. gr.66. –  Place drip tray underneath power steering pump.

–  Mark position of pulley relative to hub -arrow-.   Note t  If the power steering pump is being renewed, transfer the marking on the hub from the old pump to the new pump. t  Due to limited space, it is not possible to see the positions of the holes in the pulley relative to the holes in the hub during installation.

–  First slacken (but do not remove) bolts for pulley (only 2 of the 3 bolts are accessible). If necessary, counterhold with pin wrench -3212-. –  Rotate the power steering pump pulley so that the third bolt can be slackened. –  Remove bolts and detach pulley.

–  Release hose clips -arrows- and remove air hose.

Vehicles for hot countries –  Unplug electrical connector -2-. –  Remove bolt -1- and move continued coolant circulation pump -V51- to one side.

–  If fitted, carefully cut through cable tie -1- for wiring harness -2-. –  Detach hose clip -4- from suction hose -3-. Pull off suction hose -3-. –  Place several cloths beneath power steering pump and pressure line.

–  Unscrew union nut -1- and pull pressure line out of power steering pump. –  Seal off connections of power steering pump and lines with clean plugs.

–  Remove the two bolts -1- securing the power steering pump from the front. –  To install power steering pump, drive back sleeve -2- for bolt -3- slightly at bracket. –  Take out power steering pump. Installing Installation is carried out in the reverse sequence. Note the following points: Tightening torques → Chapter   Note t  Renew gaskets and seals. t  Before fitting a new power steering pump, put in hydraulic fluid at the inlet and turn pump by hand until fluid flows out at the pressure outlet. t  Secure all hose connections with new hose clips → Electronic parts catalogue. –  Note correct position of suction hose on power steering pump.

–  Note installation dimensions of hose clip. Dimension -a- should be 4 mm. –  Turn hub by hand until fluid comes out at pump outlet.

–  Fit power steering pump into bracket. l  Sleeve -2- has been driven back slightly. –  First screw in front bolts -1- (3x) loosely. –  Then screw in rear bolt -3- loosely. –  First tighten bolts -1- and then bolt -2-.

–  Press pressure line into power steering pump as far as stop. Then tighten union nut -1-.   Note When fitting the pressure line -4-, make sure the angle between the pipe connection and the shaft of the power steering pump is approx. 72°. –  Push suction hose onto connection and attach a new hose clip -3-.

–  Align marking on pulley -arrow- (made previously) with marking on hub.

–  Tighten bolts -arrows- for belt pulley. –  Clean off fluid in engine compartment where necessary. Install poly V-belt for power steering pump → Rep. gr.13. –  Check hydraulic fluid level → Chapter. –  Bleed steering system → Chapter. –  Check steering system for leaks → Chapter. –  Fit noise insulation → Rep. gr.66. –  Install poly-V-belt and make sure that belt runs straight → Rep. gr.13.   Note Ensure that the belt is properly seated in the pulleys when installing.

1 -  Vibration damper 2 -  Idler roller 3 -  Tensioner for poly V-belt 4 -  Alternator 5 -  Power steering pump 6 -  Air conditioner compressor –  Start engine and check that belt runs properly.