Electromechanical Power Steering Gear Overview
Electromechanical Power Steering Gear Overview
• Always replace self-locking nuts and bolts.
• Welding or straighten work on any steering components is not permissible.
• Use only power steering gear grease to lubricate the steering rack (on the pinion side) and the ball paths (on the engine side). Note: there are different types of grease for the left and right. For the correct allocation, refer to the Electronic Parts Catalog (ETKA).
• The clamps - 1 and 8 - are tensioned to different tightening specifications.
1 Clamp
• Always replace if removed
• Use the CV joint boot clamp tool to tensions the clamp => [ Tensioning the Inner Clamp ]
• Do not open or bend the new clamp.
• For the correct version, refer to the Electronic Parts Catalog (ETKA).
2 Tie rod
• 100 Nm
• Removing and Installing, refer to => [ Tie Rod ] Tie Rod
• Grease the joint with power steering gear grease.
3 Electromechanical Steering Gear
• Removing and Installing, refer to => [ Steering Gear ] Steering Gear
• Grease the steering rack with power steering gear grease. Note: there are different types of grease for the left and right. For the correct allocation, refer to the Electronic Parts Catalog (ETKA).
• Different versions, refer to the Electronic Parts Catalog (ETKA).
4 Tie Rod End
• Removing and installing, refer to => [ Tie Rod End ] Tie Rod End.
• Check dust caps for damage and correct seating.
• Check dimension.
5 Nut
• 80 Nm
• Counterhold on the tie rod end when loosening or tightening.
6 Spring Clamp
• Always replace if removed.
• Spring clamp, installing, refer to => [ Boot Assembly ] Tie Rod.
7 Boot
• Check for damage.
• Always replace if removed.
• Coat the inside of slits in the boot all the way around and evenly with power steering gear grease before installing. Refer to the Electronic Parts Catalog (ETKA).
• Check the seat for the boot on the steering gear for damage before installing. If the steering gear housing is damaged, replace the steering gear.
• Must not be twisted when toe is being adjusted.
• Make sure it is installed correctly. Refer to => [ Boot Assembly ] Tie Rod.
• Replacing, refer to => [ Boot ] Boot.
8 Clamp
• Always replace if removed.
• Use the CV joint boot clamp tool to tensions the clamp.
• Do not open or bend the new clamp.
• For the correct version, refer to the Electronic Parts Catalog (ETKA).
9 Tie Rod
• 100 Nm
• Removing and installing, refer to => [ Tie Rod ] Tie Rod.
• Grease the joint with power steering gear grease.
10 Tie Rod End
• Removing and installing, refer to => [ Tie Rod End ] Tie Rod End.
• Check dust caps for damage and correct seating.
• Check dimension.
11 Lock Nut
• 80 Nm
• Counterhold on the tie rod end when loosening or tightening.
12 Spring clamp
• Always replace if removed.
• Spring clamp, installing => [ Boot Assembly ] Tie Rod.
13 Boot
• Check for damage.
• Always replace if removed.
• Coat the inside of slits in the boot all the way around and evenly with power steering gear grease before installing. Refer to the Electronic Parts Catalog (ETKA).
• Check the seat for the boot on the steering gear for damage before installing. If the steering gear housing is damaged, replace the steering gear.
• Must not be twisted when toe is being adjusted.
• Make sure it is installed correctly. Refer to => [ Boot Assembly ] Tie Rod.
• Replacing, refer to => [ Boot ] Boot.
Tie Rod End Check Dimension
• Place a steel ruler - 2 - on the tie rod end and push it all the up to the edge - arrow - of the tie rod end - 1 -.
• Replace the entire steering gear along with the tie rod and tie rod end if the check dimension - a - is <188 mm.
Tensioning the Inner Clamp
- Mount the CV joint boot clamp tool - 1 - as illustrated. Make sure that the jaws of the clamp tool are seated in the corners - arrows - of the clamp.
- Tighten the clamp by turning the spindle using a torque wrench - 2 - (do not tilt the pliers).
• Use torque wrench - 2 - with a 5 to 50 Nm range (for example, (V.A.G 1331) ).
• make sure the spindle threads on the pliers - 1 - move freely. Grease with MoS2 grease if necessary.
• If the thread is tight e.g. dirty, the required tensioning force for the hose clamp will not be achieved in spite of correct torque specification settings.
Outer Boot Assembly
• Dimension - a - 2 mm