SEAT Workshop Service and Repair Manuals

Main shaft: adjusting

Special tools and workshop equipment required

t	Case for repairing gearboxes -U-40200-

t	All-purpose support for tester -T20020-

t	Support column for gearbox-differential -AR-2203A-

t	Dynometric keys -SAT 8010-

Adjust the main shaft when any of the following components have been replaced: t  Gearbox casing t  Clutch casing t  Main shaft t  4th gear pinion t  Tapered roller bearings in the main shaft So as to avoid unnecessary adjustment work, consult the Chart for Adjustment → Chapter.

–  Assemble the outer track of the tapered roller bearing for the main shaft in the gearbox casing without the adjustment washer, using tool -U-40200/10- and tool -U-40200/13-. –  Place the main shaft into its housing in the clutch casing. –  Assemble the gearbox casing over the clutch casing and tighten the bolts for attaching them. Tightening torque: 25 Nm + 90º

–  Place tool -T20020- with a tester over the gearbox casing. Place the end of it over the main shaft. –  Turn the main shaft a few times in order to settle the tapered roller bearings. –  Adjust the tester to “0” with a prior stress of 1 mm.   Note! The adjustment to “0” for the tester must be repeated each time that the measurement is made, otherwise, the tester will not go back to the initial position.

–  On the lower part of the gearbox, put pressure on the main 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. t  The adjustment washer needed is found by means of the following Table → Anchor. Example: t  Set in the tester = 1,21 mm. t  According to the Table for a set for the main shaft from 1.200 to 1.224 mm, a thickness of 1.175 mm would correspond to it. Table of adjustment washers

Height	Adjustment washer
measured for bearing set (mm)	Thickness (mm)	Spares No.
0.671 … 0.699 0.700 … 0.724 0.725 … 0.749	0.650 0.675 0.700	02A 311 140 02A 311 140 A 02A 311 140 B
0.750 … 0.744 0.775 … 0.799 0.800 … 0.824	0.725 0.750 0.775	02A 311 140 C 02A 311 140 D 02A 311 140 E
0.825 … 0.849 0.850 … 0.874 0.875 … 0.899	0.800 0.825 0.850	02A 311 140 F 02A 311 140 G 02A 311 140 H
0.900 … 0.924 0.925 … 0.949 0.950 … 0.974	0.875 0.900 0.925	02A 311 140 J 02A 311 140 K 02A 311 140 L
0.975 … 0.999 1.000 … 1.024 1.025 … 1.049	0.950 0.975 1.000	02A 311 140 M 02A 311 140 N 02A 311 140 P
1.050 … 1.074 1.075 … 1.099 1.100 … 1.124	1.025 1.050 1.075	02A 311 140 Q 02A 311 140 R 02A 311 140 S
1.125 … 1.149 1.150 … 1.174 1.175 … 1.199	1.100 1.125 1.150	02A 311 140 TT 02A 311 140 AA 02A 311 140 AB
1.200 … 1.224 1.225 … 1.249 1.250 … 1.274	1.175 1.200 1.225	02A 311 140 AC 02A 311 140 AD 02A 311 140 AE
1.275 … 1.229 1.300 … 1.324	1.250 1.275	02A 311 140 AF 02A 311 140 AG
1.325 … 1.349	1.300	02A 311 140 02A 311 140
1.350 … 1.374	1.325	02A 311 140 02A 311 140 A
1.375 … 1.399	1.350	02A 311 140 A 02A 311 140 A
1.400 … 1.424	1.375	02A 311 140 A 02A 311 140 B
1.425 … 1.449	1.400	02A 311 140 B 02A 311 140 B
1.450 … 1.474	1.425	02A 311 140 B 02A 311 140 C
1.475 … 1.499	1.450	02A 311 140 C 02A 311 140 C
1.500 … 1.524	1.475	02A 311 140 C 02A 311 140 D
1.525 … 1.549	1.500	02A 311 140 D 02A 311 140 D
1.550 … 1.574	1.525	02A 311 140 D 02A 311 140 E
1.575 … 1.599	1.550	02A 311 140 E 02A 311 140 E
1.600 … 1.624	1.575	02A 311 140 E 02A 311 140 F
1.625 … 1.649	1.600	02A 311 140 F 02A 311 140 F
1.650 … 1.674	1.625	02A 311 140 F 02A 311 140 G
1.675 … 1.699	1.650	02A 311 140 G 02A 311 140 G
1.700 … 1.724	1.675	02A 311 140 G 02A 311 140 H
1.725 … 1.749	1.700	02A 311 140 H 02A 311 140 H
1.750 … 1.774	1.725	02A 311 140 H 02A 311 140 J
1.775 … 1.791	1.750	02A 311 140 J 02A 311 140 J

–  Once the adjustment washer needed has been foand, remove the comparator. –  Remove the bolts that attach both casings and take out the gearbox casing. –  Remove the main shaft from the casing.

–  Remove the outer track of the tapered roller bearing for the main shaft in the gearbox casing using tool -U-40200/10- and tool -U-40200/13-. –  Place the adjustment washer with the thickness calculated (in this case, 1.175 mm) into the housing for the outer track of the tapered roller bearing.

–  Assemble the outer track of the tapered roller bearing of the main shaft in the clutch casing using tool -U-40200/10- and tool -U-40200/13-. –  Carry out a measurement for control. Measurement for control –  Place the main shaft into its housing in the clutch casing. –  Assemble the gearbox casing over the clutch casing and tighten the bolts for attaching them. Tightening torque: 25 Nm + 90º

–  Place the tool -T20020- over the gearbox casing with a tester. –  Place the end of the tester on the main shaft. –  Turn the main shaft a few times in order to settle the tapered roller bearings. –  Adjust the tester to “0” with a pretension of 1 mm. –  On the lower part of the gearbox, put pressure on the main shaft in the direction of the tester. –  The bearing play should range between a minimum of 0.01 mm and a maximum of 0.1 mm.   Note! If it is not possible to note any play in the bearing, but however the first shaft has quite a visible play that allows a smooth turn, the adjustment is right.