Volkswagen Workshop Service and Repair Manuals

(Finding thickness of "S3" shim)

The output shaft must be adjusted if
Bearing housing
Crown wheel and pinion
or output shaft bearings
have been replaced.

See also "Adjustment list" =>page 39-20

• ‒ Place a 0.65 mm shim in the bearing housing and drive the outer race of the small bearing in.
• ‒ Install output shaft and tighten end cover nuts to 20 Nm.

• ‒ → Insert gauge (3 mm range) and zero with 1 mm preload.

A - Shim 0.65 mm thick.

• ‒ Move shaft up and down and record dial gauge reading ( example: 0.30 mm)

Finding thickness of S3 shim

The specified bearing preload is obtained by adding a constant figure (0.20 mm) to the measured reading (0.30 mm) and the shim thickness (0.65 mm) for S3.

• ‒ → Remove shaft and pull outer race of small bearing out.

•      A -     Extractor 37 - 46 mm, such as Kukko 21/6
•      B -     Support Kukko 22/2

The following shims are available:

Different tolerances make it possible to select exactly the required shim thickness.

• ‒ Install outer race of small bearing with the correct shim "S3" as worked out (1.15 mm in example) and then install output shaft. Tighten end cover nut to 20 Nm.

→ A = Torque gauge 0-600 Ncm

Checking turning torque

This should be 50 - 150 Ncm for new bearings.

The turning torque on bearings which have been in use should be at last 30 Ncm.

Lubricate bearings beforehand with hypoid gear oil.