Do not attach hose clamps up to 025 mm "3094" to the return hose "2" near the check valve. Otherwise, the check valve may be damaged. The check valve is located in the return hose "2" between the clamps, "arrows". Unscrew the front wheels. Unscrew the nut "1" of the pin of the end of the transverse steering rod "2" until it is flush with the thread of the pin. When loosening, if necessary, hold it from turning.
To protect the thread, leave the nut on the pin screwed on for several turns. Press out the end of the transverse steering rod from the hub bearing housing using the ball joint puller "T40010 A". Then unscrew the nut.
Ensure that both arms of the puller lever are parallel to each other at the moment of maximum force application; correct the position if necessary. Remove the sound insulation. Unscrew the nut "3" of the rubber support "4".
Remove stabilizer "1". Remove crosspiece of stretchers "4".
Risk of damage to chassis components. Never lower the vehicle onto its wheels unless the attachment support, steering gear or subframe cross braces are properly mounted. Supporting the vehicle on the subframe or subframe cross braces (for example, when using a trolley jack, etc.) not allowed! Unscrew bolts "4" and remove pressure line "3". Remove return line "2". It is prohibited to use tools to remove the steering gear lines (risk of damage to mating and sealing surfaces). Close the pipes in the power steering mechanism with clean plugs. Close the pressure line "3" and the return line "2" with a clean plug.
Unscrew the bolt "arrow". Remove the intermediate steering shaft "1" from the steering gear "2".
For vehicles with Servotronic solenoid valve "N119": Disconnect plug connection "1" and remove it from the Servotronic solenoid valve "N119" "2".
All
Unscrew bolts "2" and remove nuts "3". Slightly move steering gear "5" to the right side and remove it.
Installation
Installation is in the reverse order. In this case, it is necessary to take into account the tightening torques. Before installation, lightly lubricate the lip seals "1" and "5" with hydraulic oil. Fully insert the pressure line "3" and the return line "2" during installation. Install the stabilizer "1". Do not fully tighten both bolts "2", then tighten them. Install the crosspiece of the stretchers "4". Remove the clamps for hoses up to 025 mm "3094" from the suction hose "1" and the return hose "2". Set the power steering mechanism to the middle position. Bleed the steering. Check the level of the working fluid in the hydraulic system. Check the tightness of all open connections of the lines. Adjust the wheel alignment angles.
Steering alignment
Adjusting the center position of the steering wheel means simply "aligning" the steering for subsequent work. The center position of the steering wheel can be accurately determined by turning the steering wheel using the computer for adjusting the wheel alignment angles. If the steering wheel is found to be off-center when determining the center position of the steering wheel using the RUUK device, the steering and suspension units must be checked for damage or deformation, and damaged parts must be replaced if necessary. The symmetry of the tie rods must also be checked. Remove the sound insulation. Set the power steering mechanism to the center position. Protrusion "1" must be opposite mark "2".
The distance from the tie rod ends to the power steering mechanism on the left and right must be the same. This data is an aid when setting the steering wheel to approximately the middle position.
(Content source: the specified website AudiManual.ru)