32 31 070Removing and installing/replacing bottom steering shaft

Important!

An end stop is no longer present if the steering shaft is disconnected from the steering gear. The steering wheel can be infinitely twisted.

In order not to damage the clock spring in the steering column:

  • Bring the steering wheel to a straight-ahead driving position.
  • Lock the steering lock -> pull off the ignition key.

Important!

For R50, R52 and R53 vehicles, there can be 2 different versions installed on the steering shaft! After the installation of a new steering shaft, the steering wheel may be twisted by 38° when straight-ahead driving!

In this case, remove the steering wheel, twist the clock spring by 38° or bring it to a straight-ahead position, offset the steering wheel 7 teeth (straight-ahead position) and install the steering wheel again!

For vehicles with DSC, perform the steering angle sensor adjustment!


Necessary preliminary tasks:

Release nut (1) and remove screw (2).

Fold universal joint upwards.

Installation note:

Mount the steering shaft (1) on the steering gear.

Feed in the bolt and fit the nut (2) but do not tighten yet.


Important!

Press the steering shaft (1) upwards up to the limit position (approx. 2 mm play) and tighten the nut (2).

Replace self-locking nut.

Tightening torque 32 31 2AZ.


Slide the bottom half of the plunging joint and the bearing upwards through the sleeve.

Release screw (1).

Installation note:

Replace screw.

Tightening torque 32 31 4AZ.


Disconnect the bottom steering shaft from the steering column.

Important!
Differentiation of the steering columns according to various versions:
  • (1) old state: Dimension (A) approx. 3 mm.

    Colour: Natural or blue

  • (2) new state: Dimension (A) approx. 8 mm.

    Colour: Black


Important!
  • Vehicles with DSC and old steering column:

    The corrugated washer (1) must be installed between the steering angle sensor (2) and bottom steering shaft (3).

  • For vehicles without DSC or with a new steering column:

    The corrugated washer is not required.


Important!
  • For vehicles with the old steering column and a new bottom steering shaft (2):

    An adapter ring (1) must be installed.

  • For a new steering column and a new bottom steering shaft:

    The adapter ring and corrugated washer are not required.


Installation note:
Make sure that the screw bore hole in the bottom steering column and the recess in the top steering shaft match. In a correct installation, the top steering shaft is located in position (1).
Important!

For R50, R52 and R53 vehicles, there can be 2 different versions installed on the steering shaft! After the installation of a new steering shaft, the steering wheel may be twisted by 38° when straight-ahead driving!

In this case, remove the steering wheel, twist the clock spring by 38° or bring it to a straight-ahead position, offset the steering wheel 7 teeth (straight-ahead position) and install the steering wheel again!

For vehicles with DSC, perform the steering angle sensor adjustment!


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