Power Steering Pump Delivery Pressure, Checking

WARNING: This page is about a different car, the 2017 Volkswagen Touareg, 2016 Volkswagen Touareg, and 2015 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

Special tools and workshop equipment required

Hose Clamps - Up To 25 mm: 3094
Power Steering Test Unit: VAG1402
Power Steering Test Unit - Adapter: VAG1402/2
Power Steering Test Unit - Adapter Hose: VAG1402/6
Power Steering Test Unit - Adapter Set: VAG1402/17

-- Remove the design cover carefully from the four retaining pins in direction of -arrows-.

Fig 1: Identifying Removal Of Engine Cover From 4 Ball Studs -Arrow-

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-- Remove the air guide hose -1-.

Fig 2: Air Guide Hose

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-- Clamp off the suction hose using Hose Clamps - Up To 25mm: 3094 .

Fig 3: Clamp Off Intake Hose Using Hose Clamp 3094.

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

-- Mount the Power Steering Test Unit: VAG1402 and the adapters as illustrated.

Fig 4: Mount The Power Steering Test Unit V.A.G 1402 And The Adapters As Illustrated.

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Power Steering Test Unit: VAG1402
Power Steering Test Unit - Adapter Hose: VAG1402/6
Bolt
Pressure Line
Power Steering Test Unit - Adapter Set - Adapter 2: VAG1402/17-2 ¹⁾ with Power Steering Test Unit - Adapter Set - Adapter 3: VAG1402/17-3
Power Steering Pump
Power Steering Test Unit - Adapter Set -Adapter 1: VAG1402/17-1 with Power Steering Test Unit - Adapter Set - Adapter 3: VAG1402/17-3

¹⁾ Replace the Power Steering Test Unit - Adapter Set -Adapter 1: VAG1402/17-1 seal if it is damaged or leaking. Refer to the Parts Information.

NOTE:

Position the Power Steering Test Unit - Adapter Set - Adapter 3: VAG1402/17-3 on the Power Steering Test Unit - Adapter Set -Adapter 1: VAG1402/17-1 so that the hose from the Power Steering Test Unit - Adapter Hose: VAG1402/6 does not touch the pulley and/or ribbed belt.

Tighten the union nuts on the Power Steering Test Unit - Adapter Set - Adapter 3: VAG1402/17-3 and the Power Steering Test Unit - Adapter Hose: VAG1402/6 hose hand-tight with an open-end wrench.

-- Remove the Hose Clamps - Up To 25mm: 3094 from the intake hose.

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

Fig 5: Ensuring Lever On Pressure Gauge Stands In Open/Closed Position

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-- Install the air guide hose -1-.

Fig 6: Air Guide Hose

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

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

-- Check the delivery pressure.

Test Prerequisites

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

-- With engine at idle speed, close stopcock, not more than five seconds (position -1-) and read pressure.

Fig 7: Ensuring Lever On Pressure Gauge Stands In Open/Closed Position

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Specification for Delivery Pressure:

120 to 128 bar (1740 to 1856.48)

If specified value is not obtained, replace power steering pump. Refer to POWER STEERING PUMP, REMOVING AND INSTALLING .

-- Remove the pressure gauge and adapter.

-- Bleed steering system. Refer to POWER STEERING SYSTEM, BLEEDING .

-- Check the hydraulic fluid level and fill if necessary. Refer to POWER STEERING, CHECKING FLUID LEVEL .

-- Check the steering system for leaks. Refer to STEERING SYSTEM, CHECKING FOR LEAKS .