Power Steering Pump, Checking Delivery Pressure, 4-Cylinder Diesel Engine, Vehicles With And Without Dynamic Steering

Special tools and workshop equipment required 

• Hose Clamps - Up To 25 mm 3094
• Torque Wrench 1331 5-50Nm VAG1331
• Power Steering Test Unit VAG1402
• Power Steering Test Unit - Adapter Hose VAG1402/6
• Power Steering Test Unit - Adapter 3 VAG1402/3, is needed for vehicles that have a pressure line with a separating point. Refer to -item  13- Pressure Line (See Figure).
• Power Steering Test Unit - Adapter Set VAG1402/17, is needed for vehicles without a pressure line with a separating point. Refer to -item 13-.
• Shop Crane - Drip Tray VAS6208

Test Prerequisites

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

Checking

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-- Clamp off the evacuation hose -1- and return hose -2- using the Hose Clamps - Up To 25mm 3094.

Applies to vehicles that have a pressure line with a separating point. Refer to -item  13- Pressure Line (See Figure).

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-- Remove the noise insulation. Refer to NOISE INSULATION, REMOVING AND INSTALLING .

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

-- Position the Shop Crane - Drip Tray VAS6208 below to collect the hydraulic oil.

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

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-- Remove the nut -3-.

-- Mount the Power Steering Test Unit VAG1402 as shown in illustration.

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1. Pressure line with separating point
2. Power Steering Test Unit - Adapter Hose VAG1402/6
3. Power Steering Test Unit VAG1402
4. Power Steering Test Unit - Adapter Hose VAG1402/6
5. Power Steering Test Unit - Adapter 3 VAG1402/3

-- Attach the Power Steering Test Unit VAG1402 hoses to the open connections on the pressure hose as illustrated.

Applies to vehicles without a separating point. Refer to -item  13- Pressure Line (See Figure).

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-- Open the hose clamps -arrows- and remove the air guide hose.

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

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-- Mount the Power Steering Test Unit VAG1402 as shown in illustration.

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1. Power Steering Pump
2. Power Steering Test Unit - Adapter Set -Adapter 1 VAG1402/17-1 with Power Steering Test Unit - Adapter Set - Adapter 3 VAG1402/17-3 (refer to  1).
3. Screw for mounting the pressure line. Refer to -item  20- Bolt (See Figure).
4. Power Steering Test Unit - Adapter Hose VAG1402/6
5. Power Steering Test Unit VAG1402
6. Pressure Line
7. Power Steering Test Unit - Adapter Set - Adapter 2 VAG1402/17-2 (refer to) 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 -item  9- Seal (See Figure). .

-- Install the air guide hose -arrows-.

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Continuation for all

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

-- Remove the Hose Clamps - Up To 25mm 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.

-- Now check delivery pressure.

-- Start the engine.

-- Close the shut-off valve to position -1- while the engine is idling and read the pressure (the lever must point away from pressure hose). Do not perform measurement longer than 10 seconds.

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Delivery pressure target value - vehicles with and without dynamic steering: 110 to 130 bar

If the pressure is not at the specified value, replace the power steering pump. Refer to OVERVIEW - POWER STEERING PUMP, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITH DYNAMIC STEERING  or OVERVIEW - POWER STEERING PUMP, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING .

-- Switch off engine.

-- Remove the Power Steering Test Unit VAG1402

Tightening specifications. Refer to OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITH DYNAMIC STEERING .

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

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-- 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 .