Removal
The steering rack is installed and removed together with the steering rod. Remove 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.
Electromechanical steering gear with transverse steering rods 1. Electromechanical steering with transverse steering rods with used amplifier "J500". Repair; 2. Bolt. 80 Nm + turn 180°. Replace each time when removing; 3. Subframe; 4. The nut is pushed into the subframe. Replace each time it is removed; 5. Intermediate steering shaft; 6. Bolt; 7. Hub bearing housing; 8. Nut. 100 Nm. Replace each time when removed
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 "arrow" nuts and lower the stabilizer. Remove the cross-connection of the stretchers.
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 the bolt "arrow". Remove the intermediate steering shaft "1" from the steering gear "2".
Disconnect plug connection "1" for vehicle signals (cAN-BUS and terminal 15) on the power steering control unit "J500" by disconnecting the lock and pressing the lock down. Disconnect the electrical plug connection "2" for the supply voltage (terminal 30) on the power steering control unit "J500" by loosening the lock "arrow" and pressing the release down.
Unscrew bolts "1,2". Slightly press the steering gear to the side "arrow A" and pull it down "arrow B".
Installation
Installation in reverse order. In this case, it is necessary to take into account the tightening torques. Do not tighten both bolts completely, then tighten them. Installing the stabilizer. Install the cross connection of the tensioners. When installing a new electromechanical steering gear, it is necessary to run the program "Replacement of the J 500 control unit" on the tester in the "Guided troubleshooting" mode. Adjust the wheel alignment angles.
Steering alignment
When centering the steering, we mean only "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 a steering wheel deviation is detected when determining the center position of the steering, it is necessary to check the steering and suspension components for damage or deformation, and replace damaged components if necessary. The symmetry of the tie rods should also be checked.
The article is a reprint of material from: AudiManual