SEAT Workshop Service and Repair Manuals

Secondary shaft: adjustment Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.

Special tools and workshop equipment required

t	Torque wrench kit -SAT 8010-, see equivalent → Anchor

t	Socket -T20020 -, see equivalent → Anchor

t	Kit (case) -U 40200A-

t	Kit (case) -U 40300-

Adjust the secondary shaft when one of the following elements has been replaced: t  clutch housing t  Output shaft t  Tapered roller bearings for output shaft To avoid unnecessary adjustment work, consult adjustment chart → Chapter. –  Remove the outer track of the small roller bearing → Fig..

–  Install outer track of secondary shaft small roller bearing in clutch casing, with a shim of 0.65 mm thickness. –  Place the secondary shaft in its housing in the clutch casing. –  Tighten the radiator bolts to a torque of 25 Nm + 90º.

–  Install support -T20020- with a comparator on the clutch housing. Locate the end of the dial gauge on the secondary shaft. –  Adjust the dial gauge to „0“ with a pre-tension of 1mm. –  Move secondary shaft alternately in direction of dial gauge. –  Note reading on comparator (e.g. 0.30 mm).   Note While measuring do not turn the secondary shaft. The roller bearings settle and falsify the measurement Shim calculation table The specified tension for the bearing can be achieved by adding the measured value (0.30 mm) to the thickness of the shim used (0.65 mm) with a constant value for pressure (0.20 mm). Example:

Shims used	0.65 mm
+ Average value	0.30 mm
+ Pressure value (const. value)	0.20 mm
Shim thickness needed	1.15 mm

The shim needed will be determined by the following table:

Adjustment table
Thickness (mm)
0,65 0,70	→ Spare parts catalogue.
0,75 0,80 0,85
0,90 0,95 1,00
1,05 1,10 1,15
1,20 1,25 1,30
1,35 1,40

The assortment of shims available makes it possible to determine exactly the necessary thickness for correct adjustment of the layshaft. –  If the thickness needed is greater than those indicated on the table, two shims can be used that add up to the determined value. –  Once the necessary shim has been determined, remove the dial gauge. –  Separate the secondary shaft. –  Remove the layshaft small conical bearing outer track from the clutch housing → Fig.. –  Remove the 0.65 mm thick shim from the clutch housing.

–  Fit the small secondary shaft rear bearing outer track with the calculated shim (1.15 mm in the example) in the clutch housing. –  Lubricate the roller bearings with gearbox oil. –  Place the secondary shaft in its housing in the clutch casing. –  Tighten the radiator bolts to a torque of 25 Nm + 90º.