POWER STEERING PUMP, CHECKING DELIVERY PRESSURE - ENGINE CODE(S): CCBA Audi S5 I

POWER STEERING PUMP, CHECKING DELIVERY PRESSURE - ENGINE CODE(S): CCBA

Special tools and workshop equipment required

1. Hose clamps up to 25 mm diameter 3094
2. Torque wrench V.A.G 1331
3. Power steering tester V.A.G 1402
4. Adapter set V.A.G 1402/6
5. Shop Crane Drip Tray VAS 6208
6. Adapter V.A.G 1402/3, needed for vehicles with a separating point inside the pressure line
7. Adapter set V.A.G 1402/17, needed for vehicles without a separating point inside the pressure line

Test Prerequisites

1. Ribbed belt/ribbed belt tension OK
2. Sealing of system
3. Hoses/lines are not kinked or constricted

Checking

Clamp off the suction hose -1- and return hose -2- using the 3094.

Applies to Vehicles with a Separating Point Inside the Pressure Line

Remove noise insulation. Refer to Description and Operation .

Engage the tester -3- on the control arm -1- using a hook -2-.

Position the VAS 6208 below to collect the hydraulic oil.

Loosen the union nut -5-. Counterhold at the hex head.

Install V.A.G 1402 as shown in illustration.

1. Pressure line with separating point
2. V.A.G 1402/6
3. V.A.G 1402
4. V.A.G 1402/6
5. V.A.G 1402/3

Attach the V.A.G 1402 hoses to the open connections on the pressure hose as illustrated.

Applies to Vehicles without a Separating Point

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

If the pressure line is also attached to the A/C compressor, then remove the bolt -C- for the bracket -D-.

Mount the V.A.G 1402 as illustrated.

1. Power steering pump
2. Adapter V.A.G 1402/17-1, refer to item 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. Pressure line
7. Adapter V.A.G 1402/17-2 with V.A.G 1402/17-3

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

Note. 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.

Continuation for All

Make sure that lever on pressure gauge stands in position -2-.

Lower vehicle.

Remove the 3094.

Start engine without giving gas.

Turn the steering wheel from lock to lock about 10 times.

Switch off engine and, if needed, fill hydraulic fluid in reservoir.

Note. To avoid damage to pump, observe 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.

With the engine at idle, close the shut-off valve to position -1- and read the pressure (the lever must face away from the pressure hose). Do not perform measurement longer than 10 seconds.

Delivery pressure specified value, vehicles without dynamic steering: 115 to 132 bar

Delivery pressure specified value, vehicles with dynamic steering: 114 to 131 bar

If the pressure is not at the specified value, replace the power steering pump. Refer to POWER STEERING PUMP, VEHICLES WITH DYNAMIC STEERING or POWER STEERING PUMP, VEHICLES WITHOUT DYNAMIC STEERING .

Switch off engine.

Remove V.A.G 1402.

Tightening specifications, refer to POWER STEERING PUMP, HYDRAULIC LINES AND RESERVOIR OVERVIEW, VEHICLES WITH DYNAMIC STEERING and POWER STEERING PUMP, HYDRAULIC LINES AND RESERVOIR OVERVIEW, VEHICLES WITHOUT DYNAMIC STEERING .

Note the line installation location when bolting the line connection. The markings -1- and -2- must be opposite each other.

Tighten the union nut -1-. Counterhold at the hex head.

Tighten the nut -3- and the rubber bushing -4- if necessary.

Bleed the steering. Refer to STEERING, BLEEDING AFTER REPLACING .

Check power steering fluid level. Refer to POWER STEERING FLUID LEVEL, CHECKING .

Check all open line connections for leaks. Refer to STEERING, CHECKING FOR LEAKS .