Electro-Mechanical Steering Gear Overview
Electro-Mechanical 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 Parts Catalog.
• 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. Refer to=> [ Tensioning the Inner Clamp ].
• Do not open or bend the new clamp.
• For the correct version, refer to the Parts Catalog
2 Tie Rod
• 100 Nm
• Removing and installing, refer to => [ Tie Rod ] Tie Rod
• Grease the joint with power steering gear grease
3 Electro-Mechanical Steering Gear
• Removing and installing, refer to => [ Electro-Mechanical Steering Gear ] Electro-Mechanical 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 Parts Catalog.
• Different versions, refer to the Parts Catalog
A removable heat shield mat was installed on the steering gear at the start of production. Be sure to install this mat if installing the old steering gear again.
A removable heat shield mat on the steering gear was replaced by a bonded heat shield mat as a running change. It is not necessary to take the mat from the old steering gear and installing on a new steering gear.
A replacement steering gear comes with the bonded heat shield mat.
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, refer to => [ Tie Rod End Check Dimension ]
5 Nut
• 80 Nm
• Counter hold on the tie rod end when loosening or tightening
6 Spring Clamp
• Always replace if removed.
• Spring clamp, installing => [ 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 Parts Catalog.
• Check the boot seat on the steering gear housing for damage. The steering gear must be replaced if there is damage.
• Must not be twisted when toe is being adjusted
• Make sure it is installed correctly => [ Boot Assembly ] Tie Rod.
• Replace, refer to => [ Boot, Replacing ] Boot, Replacing
8 Clamp
• Always replace if removed.
• Use the CV joint boot clamp tool to tensions the clamp. Refer to => [ Tensioning the Inner Clamp ].
• Do not open or bend the new clamp.
• For the correct version, refer to the Parts Catalog
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, refer to => [ Tie Rod End Check Dimension ]
11 Lock Nut
• 80 Nm
• Counter hold 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 Parts Catalog.
• 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 => [ Boot Assembly ] Tie Rod.
• Replace, refer to => [ Boot, Replacing ] Boot, Replacing
Tie Rod End Check Dimension
• Place a steel ruler - 2 - on the tie rod end and push it all the way up to the edge - arrow - of the tie rod end - 1 -.
• Replace the complete steering gear with the tie rod and tie rod end if the check dimension - a - is less than 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 for example 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