SEAT Workshop Service and Repair Manuals

Layshaft: adjusting

Special tools and workshop equipment required

t	Torque spanners -SAT 8010-

t	Bracket -T20020-

t	Kit -T20140-

t	Kit -U-40200A-

Adjust the layshaft when one of the following elements have been replaced: l  Gearbox casing l  Clutch housing l  Layshaft l  Layshaft roller bearings Refer to Adjustment chart → Chapter.

–  Fit the outer track of the layshaft roller bearings into the clutch housing, with a 0.75 mm thick shim. –  Locate the layshaft in its housing in the gearbox casing.   Note! In gearboxes manufactured from 07.97, except those bearing the letters DQW, a 1 mm shim is fitted to the gearbox casing for the outer track of the roller bearing. Check that the shim is fitted. –  Fit the clutch housing onto the gearbox casing and tighten the securing bolts to 25 Nm.

–  Fit tool -T20020- on the gearbox casing with a dial gauge. Locate the end of the dial gauge on the lay shaft. –  Turn the layshaft to settle the roller bearings. –  Adjust the dial gauge to “0” with a pre-tension of 1 mm.   Note! The adjustment to “0” of the dial gauge must be repeated every time the measurement is carried out. Otherwise the dial gauge will not return to the initial position. –  Pull the layshaft in the direction of the dial gauge. –  Take note of the measurement obtained (e.g. 0.30 mm).   Note! The dial gauge does not return to its initial position. Shim calculation table The bearing tension is obtained by adding a constant pressure value (0.2 mm) to the average value (0.3 mm) and the thickness of the shim fitted (0.75 mm).

Washer fitted		0.75 mm
+ Measured value		0.30 mm
+ Pressure (const. value)		0.20 mm
Shim thickness needed		1.25 mm

The following shims are available:

Thickness (mm)	Spare no.
0.70 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	020 311 391 Q 020 311 391 020 311 391 A 020 311 391 B 020 311 391 C 020 311 391 D 020 311 391 E 020 311 391 F 020 311 391 G 020 311 391 H 020 311 391 J 020 311 391 K 020 311 391 L 020 311 391 M 020 311 391 N

If the thickness needed is greater than those indicated on the table, two shims can be used. –  Remove the bolts that secure both casings and separate the clutch housing. –  Separate the layshaft.

–  Remove the layshaft outer roller bearing track from the clutch housing, with tool -T20140-. –  Procedure for extracting the outer track → Anchor. –  Remove the 0.75 mm thick shim from the clutch housing.

–  Fit the outer track of the roller bearing in the clutch housing with the correct shim (in this case 1.25 mm). –  Lubricate the roller bearings with gearbox oil. –  Locate the layshaft in its housing in the gearbox casing. –  Fit the clutch housing onto the gearbox casing and tighten the bolts to 25 Nm.