seat Workshop Repair Guides

SEAT Workshop Service and Repair Manuals

Final drive, differential, differential lock > < Renewing input shaft seal
Dismantling and assembling output shaft
Dismantling and assembling output shaft
Consult the equivalence table for tools and equipment according to applicability among Seat / VW / Audi / Skoda → Chapter.
   
Special tools and workshop equipment required
t  Pressure plate -VW 402-, see equivalent → Anchor
t  Terminal crimper -VW 407-, see equivalent → Anchor
t  Tube element -VW 415 A-
t  pressure tool -VW 432-
t  Press tool -30-100-

   
t  -1-Interior extractor -Kukko 21/5-
t  -4-Support bracket -Kukko 22/1-
  W00-0633
Extract the roller bearing from the clutch housing
–  On removing the roller bearing, press the safety ring -arrow- with pliers -C-.
A  - Counter-support, e.g. -Kukko 22/1-
B  - Internal remover 30... 37 mm, e.g. -Kukko 21/5-
  A35-0034
Pressing cylindrical roller bearing into clutch housing
–  Support the clutch casing by placing the tubular section -VW 415 A- (not seen in the fig.) directly below the allotment.
–  On fitting the roller bearing, press the safety ring -arrow- with pliers -A-.
–  Remove the pliers before the roller bearing is in the assembly position. The securing ring should insert into the groove of the clutch housing.
  A35-0035
Release the securing ring -1- from its slot
A  - Wear protective gloves!
  WARNING
Ensure retaining ring does not spring out uncontrolled.
  A35-0036
Press out the mobile sleeve / synchroniser body of 1st and 2nd gear
–  After removing retaining ring, press off synchromeshed gear for 2nd gear together with locking collar and synchro-hub.
  N35-0322
Installation position of 3rd and 4th gear wheel
–  Fit 4th gear wheel -A- onto output shaft.
Installation position:
The collar -arrow 1- should face towards the 3rd gear pinion -B-.
–  Fit the securing rings -2- and -3-.
–  Fit 3rd gear wheel -B- onto output shaft.
Installation position:
The collar -arrow 2- should face towards the 4th gear pinion -A-.
–  Fit the securing ring -1-.
  A35-0038
Checking inner ring for 1st and 2nd gear for wear
–  Press inner ring onto cone of synchromeshed gear and measure gap „a“ using a feeler gauge.
  V35-1138
Gap „a“Installation dimensionWear limit
1st and 2nd gears0.75...1.25 mm0.3 mm

   
Checking 1st and 2nd gear synchro-rings for wear
–  Press synchro-ring, outer ring and inner ring onto cone of synchromeshed gear and measure gap „a“ using a feeler gauge.
  V35-1137
Gap „a“Installation dimensionWear limit
1st and 2nd gears1.2 ... 1.8 mm0.5 mm

   
Installation position of outer ring, inner ring and synchro-ring for 2nd gear
–  Place inner ring -A- on synchromeshed gear for 2nd gear.
The slanted reinforcements -arrows 1- should face the outer ring -B-.
–  Fit the outer ring -B-.
The tabs -arrows 2- insert into the recesses -arrows 3- of the mobile pinion.
–  Fit the synchroniser ring -C-.
Notches -arrow 4- engage in lugs -arrow 1- of inner ring -A-.
  N35-0029
Disassembly and assembly of the mobile element / synchroniser body unit for 1st and 2nd gear
1 - Spring
2 - Mobile element
3 - Synchro-hub
4 - Locking piece
–  Slide locking collar over synchro-hub.
Installation position:
After assembling the unit, the groove of the front part -arrow A- and the highest collar -arrow B- of the synchromesh body should face the exterior cogs of the mobile element -arrow C-.
Deeper notches -arrow D- for locking pieces in synchro-hub and notches -arrow E- in locking collar must align.
  A35-0039
Assemble the mobile gearshift sleeve / synchroniser body unit of 1st and 2nd gear
l  The mobile element is on the synchromesh body.
–  Fit the locking elements in the deepest grooves -arrows- and fit the elastic rings off-set by 120º. The right angled end of the elastic rings should hook on the lower hollow section of the locking part.
  A35-0040
Pressing on locking collar and synchro-hub for 1st and 2nd gears
Installation position:
Groove for selector fork in locking collar points towards 1st gear; reverse gear splines point towards 2nd gear.
–  Turn synchro-ring so that grooves align with locking pieces.
  N35-0323
Fit retaining ring.
–  Fit the 1st gear securing ring on the mobile sleeve / synchromesh assembly.
  V35-1389
Installation position of outer ring for 1st gear
The tabs -arrows- point towards the teeth of the reverse gear.
  N35-0027
Installation position of 1st gear inner ring -A-
The tabs -arrows 1- insert into the recesses -arrows 2- of the synchromesh ring -B-.
  N35-0028
Installation position of 1st speed selector gear
The highest collar -A- should face 2nd gear -B-. Notches in shoulder -arrows- engage in lugs of outer ring → Fig..
  A35-0042

Final drive, differential, differential lock > < Renewing input shaft seal