Skoda Workshop Service and Repair Manuals

Adjusting the differential gear Special tools and workshop equipment required t  Gauge block plate -MP 3-405/17- t  Pressure plate -MP 3-407- t  Universal dial indicating gauge -MP 3-447- t  Pipe section -MP 3-450- t  Mandrel -MP 3-511- t  Interior extractor 46 through 58 mm (e.g. -Kukko 21/7-) t  Countersupport (e.g. -Kukko 22/2 -) t  Dial gauge The differential gear must be re-set when t  Gearbox housing t  Clutch housing t  Differential housing or t  if the tapered-roller bearing of the differential gear have been replaced.   Note t  New tapered-roller bearings for the differential gear are low friction. Therefore the friction torque cannot be considered as a control parameter. Correct setting of the bearing preload is only possible by determining the thickness of the adjusting washer. t  The inner and outer ring of the tapered-roller bearing are paired - do not interchange. t  For gearboxes after 06.00 do not insert gasket ring bushings when measuring.

–  Support the clutch housing with a pipe section -MP 3-450 - directly below the bearing hole. –  Press the outer ring/tapered-roller bearing in the clutch housing with impact mandrel -MP 3-511-.   Note No adjusting washer is fitted at the side of the clutch housing.

–  Press outer ring/tapered-roller bearing without adjusting washer into the gearbox housing. –  Insert the differential gear in the clutch housing. –  Position the clutch housing and tighten 5 screws to torque 25 Nm.

–  Set the dial gauge to 0 with 1 mm preload on “0”. –  Move the differential gear up and down, read off and write down the clearance on the dial gauge.    (Example: 2.30 mm)   Note Do not turn when measuring the differential as otherwise the bearing will settle and the measuring result will be inaccurate. Determine the adjusting washer The prescribed bearing preload is reached by adding to the established measured value a constant compression value (0.20 mm). Example:

measured value	2,30 mm
+ pressure (const. value) Value)	0,20 mm
Thickness of the adjusting washer =	2,50 mm

–  Remove the gearbox housing and pull out the outer ring for tapered-roller bearing from the gearbox housing. A -  Countersupport (e.g. -Kukko 22/2-) B -  Interior extractor 46 through 58 mm (e.g. -Kukko 21/7-) –  Insert an adjusting washer of the correct thickness. –  Press outer ring in again and screw down the gearbox housing. The following adjusting washers are available:

Thickness (mm)	Spare part No.
2,0	002 409 383 A
2,1	002 409 383 B
2,2	002 409 383 C
2,3	002 409 383 D
2,4	002 409 383 E
2,5	002 409 383 F
2,6	002 409 383 G
2,7	002 409 383

Different tolerances allow to measure the required thickness for each washer very precisely.