SEAT Workshop Service and Repair Manuals

Operation process

Release the outer ring of the conical roller bearing bush from the gearbox casing   Note t  Once the outer bearing ring has been removed, check if the washer is damaged; if necessary replace it. Do not change the thickness of the washer, this may lead to serious damage (always 1 mm). t  When replacing the secondary shaft bearing, always adjust the friction couple of the differential box. –  Check whether a shim S1 has to be placed under the outer race → Fig.. Continue for gearboxes up to manufacturer week 49.2006 –  First fit the S1 shim, always 1 mm in thickness, underneath the outer ring. Continued for all gearboxes –  Support the gearbox housing by placing the thrust piece -T20134- directly below bearing support.   Note t  Always replace the conical roller bearings when the differential is removed. t  The roller bearings and their corresponding outer tracks are matched pairs. They must not be confused or interchanged.

Fitting the outer ring of the roller bearing into the gearbox casing

Release the inner / outer ring of the conical roller bearing   Note t  Always replace the conical roller bearings when the differential is removed. t  Both tapered roller bearing inner races are pulled off the differential cage in the same way.   WARNING Wear protective gloves! –  Heat tapered roller bearing inner race to 100 °C before pressing on.

Insert the inner / outer ring of the conical roller bearing –  Support the differential assembly on the vice. –  Place the adaptor -U-40200/18- with the rebated side orientated towards conical roller bearing. –  Operate the vice until the bearing is inserted into its position.

Remove the outer ring of the conical roller bearing from the clutch housing   Note Once the bearing ring is extracted, check if the washer is damaged; if necessary replace it.

Pressing tapered roller bearing outer race into clutch housing –  Use the thrust pad -T20133 - connecting the shortest side to the seal.

Removing spring pin for differential pinion pin Removal: –  Cover conical roller bearing to avoid possible damage and the entry of shavings. When detaching this, the fastening sleeve must be cut. –  Drive remainder of spring pin out of differential cage.

Install differential bevel gears. –  Fit the complete assembly of thrust washers with gear oil. –  Install both sun wheels and secure (e.g. with flange shaft). –  Fit the planet gears at 180º from each other and rotate them into their final position. –  Insert the planet gear shaft -arrow A- to the first planet gear. –  Fit the threaded components -arrow B- to the sun gears. l  Fitting position: the stepped part points towards the differential pinion. –  Drive differential pinion pin into final position and secure with spring pin. Installing spring pin for differential pinion pin –  Drive into differential cage to stop.