Steering: Testing and Inspection

Power steering pump, checking delivery pressure





Special tools and equipment
^ 3094 Hose clamps
^ VAG 1402 Pressure gauge
^ VAG 1402/2 Adapter
^ VAG 1402/3 Adapter
^ VAG 1402/4 Adapter
^ VAG 1402/6 Hose from adapter set

Special tools and equipment





^ VAS 5024 Assembly pliers





^ VAG 1402/1 Adaptor

Vehicles with power steering pump in lower area





- Clamp return hose with hose clamp 3094.
- Remove noise insulation panel.





- Clamp suction hose with hose clamp 3094.
- Place oil pan under vehicle.
- Disconnect pump pressure line.
- Remove connector from pressure switch if necessary.





- Install adapter-1
Use seal.
1. VAG 1402/1
2. VAG 1402/6 Hose from adapter set





- Connect pressure gauge VAG 1402.
A. Pressure switch (n/a U.S.)
1. VAG 1402 Pressure gauge
2. VAG 1402/6 Hose from adapter set
3. Banjo bolt
4. Pressure hose banjo union
5. VAG 1402/2
6. VAG 1402 Hose from pressure gauge
- Remove hose clamp 3094 from suction and return hoses.
- Re-connect suction and return hoses.
- Start engine and if necessary add fluid to reservoir.
- Turn steering wheel approx. 10 times lock to lock.
- Check delivery pressure.

Requirements:
^ V-belt-belt tension OK.
^ System not leaking.
^ Hoses/lines are not kinked or restricted.

- With engine running at idle, close cut-off valve (not longer than 5 seconds) and read pressure.
Specifications
Gasoline engines: 85 - 95 bar (1233 - 1378 psi)
Diesel engines: 96 - 105 bar (1392 - 1523 psi)

NOTE:
^ If reading is higher or lower than specified replace pump:
^ Power steering pump (with pump in lower area), removing and installing.
^ If reservoir fluid level is low check steering system for leaks.
^ For leaks at pinion check lines line connections and if necessary tighten and wipe dry.
^ If pinion seal or rack seals in steering gear housing are leaking replace steering gear.
^ To check rack seals loosen hose clip on boot and push boot to one side.

Vehicles with power steering pump in upper area





- Remove engine cover.





- Clamp return hose with hose clamp 3094.





- Clamp suction hose with hose clamp 3094.
- Place oil pan under vehicle.
- Disconnect pump pressure line.

Pressure gauge VAG 1402, connecting





1. VAG 1402 Pressure gauge
2. VAG 1402 Hose from pressure gauge
3. VAG 1402/6 Hose from adapter set
4. VAG 1402/4 Adapter
5. O-ring
^ Qty. 2
6. VAG 1402/2
^ Adapter
7. Pressure line/hose with banjo union
8. Banjo bolt

- Remove hose clamp 3094 from suction and return hoses.
- Start engine and if necessary add fluid to reservoir.
- Turn steering wheel approx. 10 times lock to lock.
- Check delivery pressure.

Requirements:
^ V-belt-belt tension OK.
^ System not leaking.
^ Hoses/lines are not kinked or restricted.

- Close cut-off valve (not longer than 5 seconds) and read pressure, with engine idling.

Specifications
Gasoline engines: 85 - 95 bar (1233 - 1378 psi)
Diesel engines: 96 - 105 bar (1392 - 1523 psi)

NOTE:
^ If reading is higher or lower than specified replace pump
^ Power steering pump (vehicles with pump in upper area), removing and installing.
^ If reservoir fluid level is low check steering system for leaks.
^ For leaks at pinion check lines line connections for leaks and if necessary tighten and wipe dry.
^ If pinion seal or rack seals in steering gear housing are leaking replace steering gear.
^ To check rack seals loosen hose clamp on boot and push boot to one side.