Audi Workshop Service and Repair Manuals

Special tools and workshop equipment required

• ◆ Hose clamps 3094
• ◆ V.A.G 1402 Power steering tester
• ◆ V.A.G 1402/2 Adapter
• ◆ V.A.G 1402/3 Adapter
• ◆ V.A.G 1402/4 Adapter
• ◆ V.A.G 1402/6 Hose from adapter set
• ◆ Drip tray

Vehicles with bottom-mounted vane pump

Test requirements:

• ● Ribbed belt tension OK
• ● No leaks in system
• ● Hoses/pipes not kinked or constricted

• ‒ → Use hose clamp 3094 to pinch off return pipe.

• ‒ → Remove centre noise insulation -arrows-.

• ‒ Place drip tray beneath vane pump.
• ‒ → Use hose clamp 3094 to pinch off suction pipe.

• ‒ → Unplug connector on vehicles with power-assisted steering pressure switch -F88.
• ‒ Unscrew power-assisted steering pressure switch -F88 -arrow- and banjo bolt.

• ‒ → Screw adapter V.A.G 1402/1 -Item 1- with new sealing ring into vane pump connection.

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

• ‒ → Connect up pressure gauge V.A.G 1402 -Item 1-.

•     A -    Power-assisted steering pressure switch -F88
• -Featured by certain engines and design versions
•     2 -    V.A.G 1402/6 Hose from adapter set
•     3 -    Banjo bolt
•     4 -    Banjo union of pressure hose
•     5 -    V.A.G 1402/2
•     6 -    V.A.G 1402 Hose of pressure gauge

• ‒ Detach hose clamp 3094 from suction and return pipes.
• ‒ Start engine and, if necessary, top up fluid level in reservoir.

• ‒ Turn steering wheel roughly 10 times from lock to lock.
• ‒ Then check delivery pressure.
• ‒ With engine idling, close shutoff valve (max. 5 seconds) and take pressure reading.
• ‒ Specification for petrol engines: 85 ... 95 bar
• ‒ Specification for TDI engines: 95 ...105 bar
• ‒ Specification for Audi S3: 110 ...120 bar

Notes:

• ◆ If reading drops below or exceeds specification, replace pump
  .
• ◆ Always check steering system for leaks in the event of a lack of fluid in the reservoir.
• ◆ If a leak is found in the area of the steering pinion, start by checking pipes/pipe connections for leaks, re-tighten if necessary and wipe dry.
• ◆ Replace steering box in the event of leakage at steering pinion sealing ring or rack seal in steering box housing.
• ◆ To check rack seal, unfasten hose clamp of bellows and push bellows to one side.

Vehicles with top-mounted vane pump

Test requirements:

• ● Ribbed belt tension OK
• ● No leaks in system
• ● Hoses/pipes not kinked or constricted

• ‒ → Use hose clamp 3094 to pinch off return pipe.

• ‒ → Use hose clamp 3094 to pinch off suction pipe.
• ‒ Place drip tray beneath vane pump.
• ‒ Unscrew pressure pipe from pump.

• ‒ Connect up pressure gauge V.A.G 1402 as shown.

• Pressure gauge V.A.G 1402
• Hose from V.A.G 1402
• Hose from adapter set V.A.G 1402/6
• Adapter V.A.G 1402/4
• Sealing rings
• ◆ 2x
• Adapter V.A.G 1402/2
• Pressure pipe
• ◆ With banjo union
• Banjo bolt

• ‒ Detach hose clamp 3094 from suction and return pipes.
• ‒ Start engine and, if necessary, top up fluid level in reservoir.
• ‒ Turn steering wheel roughly 10 times from lock to lock.
• ‒ Then check delivery pressure.
• ‒ With engine idling, close shutoff valve (max. 5 seconds) and take pressure reading.
• ‒ Specification: 95 ... 105 bar

Notes:

• ◆ If reading drops below or exceeds specification, replace pump
  => Page 48-95.
• ◆ Always check steering system for leaks in the event of a lack of fluid in the reservoir.
• ◆ If a leak is found in the area of the steering pinion, start by checking pipes/pipe connections for leaks, re-tighten if necessary and wipe dry.
• ◆ Replace steering box in the event of leakage at steering pinion sealing ring or rack seal in steering box housing.
• ◆ To check rack seal, unfasten hose clamp of bellows and push bellows to one side.