SEAT Workshop Service and Repair Manuals

Primary shaft: adjustment

Special tools and workshop equipment required

t	Universal tester stand -T20020-

t	Replacement parts extractors case -U-40100-

t	Replacement parts repair case -U-40200-

Adjust the primary shaft if any of these components have been replaced: l  Gearbox casing. l  Clutch casing. l  Primary shaft. l  Primary shaft tapered roller bearings. To avoid unnecessary adjustment work, consult the Adjustments chart → Chapter.

–  Using tool -U-40200/11- and -U-40200/10-, fit the outer track of the primary shaft tapered roller bearing in the clutch casing without the adjusting washer. –  Put the primary shaft in its housing in the gearbox casing. –  Mount the clutch casing on the gearbox casing and screw in the securing bolts. t  Tightening torque: 25 Nm

–  Set tool -T20020- with a tester onto the gearbox casing. Fit the end on to the primary shaft. –  Give the primary shaft a few turns to seat the tapered roller bearings. –  Adjust the tester to “0” with a pretension of 1 mm.   Note! The adjustment of the tester to “0” must be repeated each time the measurement is done. If not, the tester will return to the initial position. –  On the lower part of the gearbox, put pressure on the primary shaft in the direction of the tester. –  Note the reading given on the tester (Example 1.21 mm).   Note! The tester does not return to the initial position. The necessary adjusting washer can be determined from the following table:

Adjusting washer chart

Set of bearings	Adjusting washer
Measurement (mm)	Thickness (mm)	Parts Nº
…0,66 0,67…0,68 0,69…0,70	0,650 0,675 0,700	085 311 391 085 311 391 N 085 311 391 A
0,71…0,73 0,74…0,75 0,76…0,78	0,725 0,750 0,775	085 311 391 P 085 311 391 B 085 311 391 Q
0,79…0,80 0,81…0,82 0,83…0,85	0,800 0,825 0,850	085 311 391 C 085 311 391 R 085 311 391 D
0,86…0,88 0,89…0,90 0,91…0,93	0,875 0,900 0,925	085 311 391 S 085 311 391 E 085 311 391 T
0,94…0,95 0,96…0,98 0,99…1,00	0,950 0,975 1,000	085 311 391 F 085 311 391 AA 085 311 391 G
1,01…1,03 1,04…1,05 1,06…1,08	1,025 1,050 1,075	085 311 391 AB 085 311 391 H 085 311 391 AC
1,09…1,10 1,11…1,13 1,14…1,16	1,100 1,125 1,150	085 311 391 J 085 311 391 AD 085 311 391 K
1,17…1,18 1,19…1,20 1,21…1,23	1,175 1,200 1,225	085 311 391 AE 085 311 391 L 085 311 391 AF
1,24…1,26 1,27…1,28 1,29…1,30	1,250 1,275 1,300	085 311 391 M 085 311 391 AG 085 311 391 AH
1,31…1,33 1,34…1,36 1,37…1,38	1,325 1,350 1,375	085 311 391 AJ 085 311 391 AK 085 311 391 AL
1,39…1,40 1,41…1,43 1,44…1.46	1,400 0,700 + 0,725 0,700 + 0,750	085 311 391 AM 085 311 391 A + P 085 311 391 A + B
1,47…1,48 1,49…1,50 1,51…1,53	0,700 + 0,775 0,700 + 0,800 0,700 + 0,825	085 311 391 A + Q 085 311 391 A + C 085 311 391 A + R
1,54... 1,56 1,57…1,58 1,59…1,61	0,700 + 0,850 0,700 + 0,875 0,700 + 0,900	085 311 391 A + D 085 311 391 A + S 085 311 391 A + E
1,62…1,63 1,64…1,66 1,67…1,68 1,69…1,70	0,700 + 0,925 0,700 + 0,950 0,700 + 0,975 0,700 + 1,000	085 311 391 A + T 085 311 391 A + F 085 311 391 A + AA 085 311 391 A + G

–  Once the necessary adjusting washer has been determined, detach the tester. –  Take out the bolts securing both casings and detach the clutch casing. –  Detach the primary shaft.

–  Using tool -U-40100/2-, detach the outer track of the primary shaft tapered roller bearing from the clutch casing. –  Attach the adjusting washer with the calculated thickness (in this case, 1.225 mm) to the outer track tapered roller bearing housing.

–  Using tool -U-40200/10- and tool -U-40200/11-, attach the outer track of the primary shaft tapered roller bearing to the clutch casing. –  Do a check measurement. Check measurement –  Put the primary shaft in its housing in the gearbox casing. –  Mount the clutch casing on the gearbox casing and screw in the securing bolts. t  Tightening torque: 25 Nm

–  Attach tool -T20020- with a tester to the gearbox casing. Fit the end on to the primary shaft. –  Give the primary shaft a few turns to seat the tapered roller bearings. –  Adjust the tester to “0” with a pretension of 1mm. –  On the lower part of the gearbox, put pressure on the primary shaft in the direction of the tester. –  The bearing play should oscillate between a minimum of 0.01 mm and a maximum of 0.10 mm.   Note! The adjustment is correct when there is no play in the bearing but quite obvious play in the primary shaft that enables it to turn smoothly. –  Maximum friction torque: 20 Ncm.