Power Steering Pump Delivery Pressure, Checking, 8-Cylinder Gasoline And Diesel Engine

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 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 Set:VAG1402/2
Power Steering Test Unit - Adapter Hose:VAG1402/6
Power Steering Test Unit - Adapter Set 19:VAG1402/19
Power Steering Test Unit - Adapter Set 19:VAG1402/19
Shop Crane - Drip Tray:VAS6208

Test Prerequisites

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

-- Disconnect the return hose -2- from the hydraulic fluid reservoir.

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Hose Clamps - Up To 25mm:3094

-- Remove the rear noise insulation. Refer to NOISE INSULATION .

-- Place the Shop Crane - Drip Tray:VAS6208 under the vehicle.

-- Clamp off the return line.

Fig 1: Clamp Off The Return Line

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Hose Clamps - Up To 25mm:3094

-- Remove the bolt -1-.

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-- Remove the union nut -2- and disconnect the return line -2- from the steering gear.

-- Remove the union nut -1- and disconnect the pressure line -2- from the steering gear.

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-- Secure the Power Steering Test Unit:VAG1402 -3- with a cable tie -2- to stabilizer bar -1-.

Fig 2: Identifying V.A.G 1402 -3-, Cable Tie -2- And Stabilizer Bar -1-

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-- Install the Power Steering Test Unit - Adapter Set 19 - Adapter 19-1:VAG1402/19-1 in the steering gear -2-.

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-- Connect the Power Steering Test Unit - Adapter 2: VAG1402/2 -3- with the Power Steering Test Unit - Adapter Set 19 - Adapter 19-1:VAG1402/19-1 .

-- Connect the Power Steering Test Unit - Adapter Hose:VAG1402/6 with the Power Steering Test Unit:VAG1402 .

-- Connect the Power Steering Test Unit - Adapter Hose:VAG1402/6 with the Power Steering Test Unit - Adapter Hose:VAG1402/6 -3-.

-- Disconnect the pressure line -1- with the Power Steering Test Unit - Adapter Hose: VAG1402/6 -2-.

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-- Connect the Power Steering Test Unit - Adapter Hose:VAG1402/6 -2- with the Power Steering Test Unit - Adapter Hose:VAG1402/6 -3-.

-- Attach the return line -1- with the union nut -3- to the steering gear -2- and tighten to specification.

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-- Remove the Hose Clamps - Up To 25mm:3094 -1- from the return line.

Fig 3: Clamp Off The Return Line

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-- Remove the Hose Clamps - Up To 25mm: 3094 -1- from the return hose -2-.

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

Fig 4: Ensuring Lever On Pressure Gauge Stands In Open/Closed Position

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

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

NOTE:

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.

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

Fig 5: 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, 8-CYLINDER GASOLINE AND DIESEL ENGINE .

-- Disconnect the return hose -2- from the hydraulic fluid reservoir.

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Hose Clamps - Up To 25mm:3094

-- Clamp off the return line.

Fig 6: Clamp Off The Return Line

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Hose Clamps - Up To 25mm:3094

-- Remove the union nut -3- from the steering gear -2- and disconnect the return line -1-.

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-- Remove the Power Steering Test Unit - Adapter Set 19 - Adapter 19-1:VAG1402/19-1 from the steering gear -2-.

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-- Disconnect the pressure line -1- from the Power Steering Test Unit - Adapter Hose: VAG1402/6 -2-.

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-- Insert the pressure line -2- into the steering gear and tighten the union nut -1- to tightening specification.

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-- Insert the return line -3- into the steering gear and tighten the union nut -2- to tightening specification.

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-- Install the bolt -1- and tighten.

-- Remove the Hose Clamps - Up To 25mm:3094 -1- from the return line.

Fig 7: Clamp Off The Return Line

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-- Remove the Hose Clamps - Up To 25mm: 3094 -1- from the return hose -2-.

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-- Remove the Power Steering Test Unit:VAG1402

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

-- Check the hydraulic fluid level and fill if necessary. Refer to the appropriate service information.

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