Power Steering Pump Delivery Pressure, Generation I with SCR and V6 TDI, Generation II, Checking

Power Steering Pump Delivery Pressure, Generation I with SCR and V6 TDI, Generation II, Checking

Special tools, testers and auxiliary items required

• Hose clamps up to 25 mm diameter (3094)

• Torque wrench (V.A.G 1331)

• Power steering tester (V.A.G 1402)

• Adapter set (V.A.G 1402/6)

• Adapter set (V.A.G 1402/17)

Test Prerequisites

• Ribbed belt/ribbed belt tension OK.

• Sealing of system.

• Hoses/lines are not kinked or constricted.

Checking






- Carefully pull off engine cover from 4 retainers - arrows -.

- Remove the air guide hose - arrows -.






- Clamp the intake hose and the return line on the reservoir using (3094).







• The (3094) must not be secured on return hose in check valve area. Otherwise, check valve will be damaged.

• The check valve is in the return hose between the cambers - A arrows - or between hose clamps - B arrows -.

Check Valve in Return Hose





- Remove the bolts - 1 - and remove the pressure line from the power steering pump.






- Mount the (V.A.G 1402) as illustrated.






1. Power steering pump

2. Adapter (V.A.G 1402/17-1) * with elbow (V.A.G 1402/17-3)

3. Screw for mounting the pressure line

4. Hose from (V.A.G 1402/6)

5. (V.A.G 1402)

6. Pressurized line

7. Adapter (V.A.G 1402/17-2) with (V.A.G 1402/17-3)


* Replace the (V.A.G 1402/17-1) seal if it is damaged or leaking.

• Position the (V.A.G 1402/17-3) on the (V.A.G 1402/17-1) so that the hose from the (V.A.G 1402/6) does not touch the pulley and/or ribbed belt.

• Tighten the union nuts on the (V.A.G 1402/17-3) and the (V.A.G 1402/6) hoses hand-tight with an open-end wrench.

- Remove the (3094).

Make sure the lever on the pressure gauge is in position - 2 -.






- Install the air guide hose - arrows -.






- Start engine and fill hydraulic fluid in reservoir if necessary.

- Turn steering wheel from stop to stop approximately 10 times.

• To avoid damage to pump, note the following:

• Pressure gauge shut-off valve must not remained closed longer than 10 seconds during this test.

• Start engine without giving gas and run at idle.

• Read the pump pressure immediately after starting at idle speed (have it read by second technician, if necessary).

• Because pressure falls over the course of the test, the highest pressure shown is the decisive measurement.

- Now check delivery pressure.

- Start engine and when at idle speed, close shut-off valve - item 1 - and read pressure (do not measure longer than 10 seconds).






Specification for delivery pressure: 110 to 128 bar

If specified value is not obtained, replace power steering pump. Refer to => [ Assembly Overview
II - Power Steering Pump for Engine Generation I with SCR and Generation
II ] Service and Repair.

- Switch off engine.

- Remove (V.A.G 1402).

- Insert the pressure line with a new o-ring into the power steering pump and tighten the bolts.

- Bleed steering system. Refer to => [ Steering System, Bleeding after Reconstructing ] .

- Check power steering fluid level. Refer to => [ Power Steering, Checking Hydraulic Oil Level ] .

- Check the steering system for leaks. Refer to => [ Steering System, Checking for Leaks ] Steering System, Checking For Leaks.

- Clean engine, engine compartment and subframe in power steering pump area.