Removal and installation vane pump, 6-cyl. petrol engine (VW Touareg 1)

Repair work for the vane pump is not provided. In case of failure, its cause is determined by hydraulic testing and leak testing. In case of failure, the vane pump is subject to replacement.

NOTE: If there is no fluid in the reservoir, check the entire steering system for leaks. If there is a leak in the area of the pipe connections, first check the pipes and their connections for leaks, tighten them if necessary and wipe dry. Pumps from the spare parts warehouse are not filled with oil. Therefore, before installation, be sure to fill with hydraulic oil G 002 000 and turn by hand, otherwise noise may occur during movement or the pump may be damaged.

NOTE: Replace the O-rings. Do not reuse the drained oil.

Removal

Remove the engine soundproofing screen.



Mark the direction of rotation of the poly V-belt.

Screw the M8x50 bolt into the threaded hole of the tension roller enough to loosen the poly V-belt.

Unscrew the impeller pump pulley. Remove the poly V-belt (Fig. 5.36).

NOTE: When removing the pulley, pay attention to the adjusting washer located underneath it. This is important for measuring and adjusting the impeller pump. Do not remove the adjusting washer from the impeller pump wheel yet.

Clamp the suction hose using hose clamp 3094 (Fig. 5.37).



Remove the hollow bolt.

Cover the pressure pipeline with polyethylene or the like.

Open the spring clamp and remove the suction hose from the impeller pump.

Unscrew and remove the impeller pump.

Measure the distance a (Fig. 5.38).




The thickness of the adjusting washer is taken into account when measuring. Record the measured value.

Installation

Installation is carried out in the reverse order, taking into account the following.

Measure dimension a on a new impeller pump without the adjusting washer.

Record the measured value.

Determine the thickness of the adjusting washer.

Fill the vane pump with hydraulic oil. Pour the oil through the suction port of the vane pump.

Turn the hub by hand until oil comes out on the pressure side.

Install the impeller pump.

Bleed the steering system.

Check the level of working fluid in the hydraulic system.

Check the steering system for leaks.

Determining the thickness of the adjusting washer

Using the measured values, determine the thickness of the adjusting washer.

Example:

The measurement result of the old impeller pump with an adjusting washer is 33.65 mm.

The measurement result of a new impeller pump without an adjusting washer is 32.85 mm.

Thickness of the adjusting washer: 33.65-32.85=0.80 mm.

The following adjusting washers are available: thickness (mm): 0.6; 0,8; 1,0; 1,2; 1,4.

Install the impeller pump.

Tightening torques

Vane pump to mount - 25 Nm.

Pulley to impeller pump - 25 Nm.

Hollow bolt to impeller pump - 40 Nm.