Volkswagen Workshop Service and Repair Manuals

Checking delivery pressure of motor/pump unit

Special tools and workshop equipment required

t	Power steering tester -V.A.G 1402-

t	Adapter -V.A.G 1402/1A-

t	Adapter -V.A.G 1402/2-

t	Hose from adapter set -V.A.G 1402/6-

Vehicles with air filter on left in engine compartment –  Remove battery and battery tray → Electrical system; Rep. Gr.27. Continuation 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 noise insulation for engine → General body repairs, exterior; Rep. Gr.50. –  Unscrew pressure line at motor/pump unit.

–  Install adapter as shown in illustration. 1 -  Motor/pump unit 2 -  Power steering tester -V.A.G 1402- 3 -  Hose from adapter set -V.A.G 1402/6- 4 -  Adapter -V.A.G 1402/2- 5 -  Pressure line 6 -  Adapter -V.A.G 1402/1A-

Ensure that lever on pressure gauge is in position -2-. –  Fill up with hydraulic fluid and check fluid level → Chapter. –  Bleed steering system → Chapter. –  Now check delivery pressure. Test prerequisites: l  System must be free of leaks. l  Hoses and lines must not be kinked or restricted. –  Start engine.

–  With engine idling, close shut-off valve (position -1-) for no longer than 5 seconds and note pressure. Specification for delivery pressure:    90…105 bar If specification is not attained, renew motor/pump unit → Chapter. Turn steering wheel to full lock and hold in that position (shut-off valve in position -2-) - read off pressure. If the reading is significantly lower than the first measured value then there is a leak in or on the steering box. –  Remove pressure gauge and adapter. –  Attach pressure line to motor/pump unit. –  Fill up with hydraulic fluid and check fluid level → Chapter. –  Bleed steering system → Chapter. –  Check hydraulic fluid level and top up if necessary → Chapter. –  Check steering system for leaks → Chapter. –  Attach noise insulation.

Specified torques

Component	Specified torque
Pressure line to motor/pump unit t  Use new oil seal	30 Nm