Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

• ◆ V.A.G 1402 Power steering tester
• ◆ V.A.G 1402/3 Adapter
• ◆ V.A.G 1402/6 Hose from adapter set
• ◆ V.A.G 1921 Hose clamp pliers

• ‒ → Unfasten hose clamps -arrows- and take out intake hose -1-.
• ‒ Place drip tray in position.
• ‒ Unscrew union nut -2- whilst providing support at hexagon of pressure pipe.
• ‒ Use dummy plug to seal off pipe to steering box.

• ‒ → Screw adapter -V.A.G 1402/3- into expansion hose with pipe leading to vane pump.
• ‒ Screw hose of pressure gauge -V.A.G 1402- to adapter -V.A.G 1402/3-.

• ‒ → Close cut-off valve of pressure gauge (lever in -position 1-).
• ‒ Re-install intake hose.
• ‒ Top up fluid in reservoir if necessary.

Checking pressure:

Pay attention to the following to avoid damaging pump:

• ◆ Engine must not run for more than 10 seconds when performing this test.
• ◆ Start engine without pressing accelerator and allow it to idle.
• ◆ Take pump pressure reading at idling speed immediately after starting (have second mechanic take reading).
• ◆ Maximum pressure displayed is definitive, as pressure decreases in the course of the test.

• ‒ Then check delivery pressure.

• ‒ Start engine (max. 10 seconds) and take pressure reading at idle (2nd mechanic required).

Pump pressure specification (gauge pressure)

If readout does not match specification, replace vane pump

.

• ‒ Switch off engine.
• ‒ Remove intake hose again.
• ‒ Remove pressure gauge.
• ‒ Remove dummy plug from pipe to steering box.
• ‒ Connect expansion hoses with union nut , Item 26.
• ‒ Check hydraulic fluid level .
• ‒ Bleed steering system .
• ‒ Check steering system for leaks .