SEAT Workshop Service and Repair Manuals

Hydraulic pump pressure delivery: Check Consult the equivalence table for tools and equipment according to applicability between Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Oil extractor -SAT 1100-, see equivalent → Anchor

t	Tightening torque -SAT 8010-, see equivalent → Anchor

t	Power steering tester -V.A.G 1402-

t	Adapter -VAG 1402/1A 2-

t	Adapter -V.A.G 1402/3-

t  Adapter set hose -V.A.G 1402/6- Test requirements l  System seal l  The pressure tube and the return line should never be bent or trapped   Note When working on the airbag system, the battery earth strap must be removed. To this end, it is necessary to check whether the vehicle has a coded radio. If so, refer to the anti-theft coding.

–  Unscrew the plug -1- for the hydraulic oil tank from the electro-hydraulic pump unit -2-. –  Extract the hydraulic oil through the filling hole using the oil extractor -SAT 1100-. –  Remove front left-hand wheel. –  Remove the sound proofing: → Rep. Gr.50 . –  Remove the front left-hand wheel housing moulding: → Rep. Gr.66 .

–  Open the distancer -1- and remove the pressure tube -2-. –  Fit a tray underneath the electro-hydraulic pump unit to collect the oil.

–  Unscrew the bolt -3- and take out the pressure tube -2- from the electro-hydraulic pump unit -1-. –  Attach the pressure pipe to the stabiliser.   Note The bend radius should not be less than 100 mm.

–  Connect the power steering tester -VAG 1402--1-. –  Hook the tester to the rear axle. The lines must not be put under strain or pulled. 1  -  Power steering tester -V.A.G 1402- 2  -  Adapter -V.A.G 1402/3- 3  -  Adapter set hose -V.A.G 1402/6- 4 y 5  -  Adapter -VAG 1402/1A 2- A  -  Expandable hose (high pressure conduit) B  -  Electro-hydraulic pump unit C  -  Return pipe

–  Open the shut-off valve of the manometer for the power steering -1-. The lever -2- must point vertically downwards.   Note The mark on the lever shaft remains in horizontal position when the manometer shut-off valve is open. –  Fill with hydraulic oil and bleed air from the power steering system → Chapter.   Note t  To verify the pressure the help of a second mechanic is required. t  The pressure test should not take longer than 5 seconds to avoid damage to the electro-hydraulic pump unit. t  The shut-off valve on the manometer should not be closed during the test. If the valve is closed, the indicated specification descends to 0 MPa (bar) after operating the pressure valve on the electro-hydraulic pump unit. –  Start the engine. –  With the steering turned all the way, hold the steering wheel to the left and the right stop for about 5 seconds. –  Measure the pressure with the steering turned all the way to the left or the right and with the engine running at idle. –  Compare the measured value with the specification from the following table:

Engines	Pressure specification
	MPa	bar
Petrol	9,6...10,4	96...104
Diesel	9,6...10,4	96...104

Note If this is exceeded and the specification is not reached then the electro-hydraulic pump unit must be replaced → Chapter. –  Switch off the engine. –  Extract the hydraulic oil with the oil extractor -SAT 1100-. –  Remove the power steering tester -VAG 1402-. –  Fit the pressure pipe correctly to the electro-hydraulic pump unit and tighten. Specified torque: 30 Nm –  Fill with hydraulic oil and bleed air from the power steering system → Chapter. –  Fit the front left-hand wheel housing moulding: → Rep. Gr.66 . –  Fitting the soundproofing: → Rep. Gr.50 . –  Fit the front left hand side wheel. Specified torque: 120 Nm