SEAT Workshop Service and Repair Manuals

Operation process

Remove the outer ring of the tapered roller bearing from the clutch housing and gearbox casing   Note t  The procedure and tools needed to remove the secondary shaft rear bearings outer tracks, are identical in the gearbox casing and the clutch housing. t  To remove the outer track of the clutch housing, first remove the socket for right hand flanged shaft → Fig..

Install the outer ring of the tapered roller bearing to the clutch housing and gearbox casing   Note t  The procedure and tools needed to install the secondary shaft rear bearings outer tracks, are identical in the gearbox casing and the clutch housing. t  No shim is installed on the clutch housing side.

Removing the roller bearing   Note The procedure and tools needed to remove the secondary shaft rear bearings outer tracks, are identical in the gearbox casing and the clutch housing. –  Locate adapter -U-40300/13- on differential. –  Place the bridge adaptor -U 40100/1- on adaptor -U-40300/13-, ensuring that the claws are inserted into the notches in the differential casing. Remove the bearing.   Note If the bearing cage breaks during the extraction then use the kit -T20022- to remove the inner ring of the bearing.

Install the roller bearing   Note t  The procedure and tools needed to remove the roller bearings are identical for both sides of the differential box. t  Before installing the bearing in the differential casing heat with electro-blower -SAT 1416- to 100 ºC. The temperature can be checked with digital thermometer -SAT 4013-. –  Place adapter -U-40300/13- in a press. –  Place differential assembly on the tool adapter -U-40300/13-. –  Place adapter -U-40300/11- with side -B- facing the bearing, on the differential assembly.

Spring pin identification

Dim. „a“ mm	Identification
28.5 (short spring pin) Removing and installing → Fig.	Circumferential groove -arrows-
36.0 (long spring pin), Removing → Fig., Installing → Fig.	No circumferential groove

Allocation of differential cages –  Check hole for spring pin in differential cage. The hole in the differential cage was modified for the longer spring pin.

Bore	Length of spring pin (mm)
-A-	28.5 (short spring pin)
-A- and -B-	36.0 (long spring pin)

Spring pin with circumferential groove (short spring pin): Removing and installing Removal: –  Cover tapered roller bearing inner race and speedometer drive gear to avoid possible damage and ingress of metal particles. –  Remove the tension sleeve using a chisel, apply pressure to the groove for this purpose. Installation –  Drive into differential cage to stop.

Spring pin without annular groove (long spring pin): Removing differential pinion pin The spring pin is sheared off when pressing out. –  Drive remainder of spring pin out of differential cage.

Installing spring pin without circumferential groove (long spring pin) –  Align hole in differential pinion pin with hole in differential cage. –  Drive in new spring pin with drift -1- until dimension -a- = 3.0 mm is attained. l  The spring pin must not come in contact with gears with differential cage installed.

In some gearboxes, the one-piece thrust washer has a shoulder -A- near the holes In this case, the differential cage has a circumferential groove -B-. –  Lubricate one piece thrust washer with gear oil and install. –  Install one-piece thrust washer so that it engages in groove -B- in differential cage.

Installing differential bevel gears –  Coat the thrust washers with gearbox oil and fit in the differential casing. –  Locate planet gears -A- and secure with articulation flanges -B-.

–  Insert planet pinions offset 180° and pivot into position. –  Press in differential pinion pin (-arrow A-) to first planet pinion. –  Place threaded pieces -arrows B- in sun gears. –  In this position, turn the satellites towards the inside of the differential box using the articulation flanges, until they coincide with the holes on the satellite shaft. –  Fit the satellite shaft into its final position and install a new elastic pin to secure it.

Installation position of thrust washer for tapered ring -1- Collar -arrow- faces spring -B-. Some gearbox versions have projections -A-. The projections -A- face towards tapered ring -1-.