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 5-50 Nm :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  ) OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - PRESSURE LINE.
• Power Steering Test Unit - Adapter Set:VAG1402/17  , is needed for vehicles without a pressure line with a separating point. Refer to -item  ) OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - PRESSURE LINE.
• Shop Crane - Drip Tray:VAS6208 

Test Prerequisites 

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

Checking

-- Clamp off the evacuation hose -1- and return hose -2- using the :3094  .

Applies to vehicles that have a pressure line with a separating point. Refer to -item  ) OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - PRESSURE LINE

-- 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 :VAS6208  below to collect the hydraulic oil.

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

-- Remove the nut -3-.

-- Mount the :VAG1402  as shown in illustration.

1. Pressure line with separating point
2. :VAG1402/6 
3. :VAG1402 
4. :VAG1402/6 
5. :VAG1402/3 

-- Attach the :VAG1402  hoses to the open connections on the pressure hose as illustrated.

Applies to vehicles without a separating point. Refer to -item  ) OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - PRESSURE LINE

-- 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.

-- Mount the :VAG1402  as shown in illustration.

1. Power Steering Pump
2. :VAG1402/17-1  (refer to  POWER STEERING PUMP, CHECKING DELIVERY PRESSURE, 4-CYLINDER DIESEL ENGINE, VEHICLES WITH AND WITHOUT DYNAMIC STEERING - REPLACE THE) with :VAG1402/17-3 
3. Screw for mounting the pressure line. Refer to -item  OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - BOLT
4. :VAG1402/6 
5. :VAG1402 
6. Pressure Line
7. :VAG1402/17-2  (refer to) with :VAG1402/17-3 

1. Replace the :VAG1402/17-1  seal if it is damaged or leaking. Refer to -item  OVERVIEW - HYDRAULIC LINE, RESERVOIR, VEHICLES WITH 4-CYLINDER DIESEL ENGINE, VEHICLES WITHOUT DYNAMIC STEERING - SEAL Refer to the Parts Information..

-- Install the air guide hose -arrows-.

Continuation for all

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

-- Remove the :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.

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 :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.

-- 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 .