Skoda Workshop Service and Repair Manuals

ATF supply

Caution For ATF pump and ATF supply, only use the same fitting status - recognizable at alignable oil drillings. If the fitting status is mixed, the ATF pump can build up pressure.

2 -	Mounting ring

q	check for deformation

4 -	ATF pump housing

q	Check contact surfaces for traces of scoring and friction → Fig.

q	check brass bush for wear → Fig.

5 -

Ring gear

q	Check contact surfaces for traces of scoring and friction → Fig.

6 -	ATF pump gear

q	Check contact surfaces for traces of scoring and friction → Fig.

q	Check driver in ATF pump gear → Fig.

8 -	Intermediate plate

q	Check contact surfaces for traces of scoring and friction → Fig.

10 -	ATF supply

q	Check quantity regulating valve of ATF supply for smooth operation → Fig.

13 -	Stator shaft

q	check brass bush for wear → Fig.

q	check serration for wear

q	must be positioned in the housing for ATF supply pos. 10, replace both parts in case of loose position

16 -	Rectangular ring for clutch “A”

q	check for wear → Fig.

17 -	Axial needle bearing

q	Perform visual inspection for damage: Axial needle bearing and its contact surfaces must be like new, replace if necessary

18 -	Rectangular rings for clutch “B”

q	check for wear → Fig.

Check brass bush of ATF pump housing for wear –  Check the contact surface of brass bush -arrow- for wear. l  The contact surface must not have any major scoring and/or blue colouring. In case of major scoring and/or blue colouring: –  Replace the ATF pump → Electronic Catalogue of Original Parts. If the contact surface has no blue colouring and only minor scoring, then proceed as follows: –  Pull sand paper with graining 600 oiled once to twice over the contact surface. –  Carefully wipe off with a clean cloth and check the contact surface. l  The contact surface must now be like new. If so, do not have the scoring eliminated: –  Replace the ATF pump → Electronic Catalogue of Original Parts.

–  Also check hub of torque converter -arrow- for traces of friction. If traces of friction on the torque converter can be detected: –  Replace the torque converter.

Check parts of the ATF pump for traces of scoring and friction –  Check the contact surfaces of the following parts for traces of scoring and friction: 2 -  ATF pump housing 3 -  Ring gear 4 -  ATF pump gear 5 -  Intermediate plate l  The surfaces of the contact surfaces must be dull or glossy, however without any minor scoring.   Note A defective ATF pump leads to delays in the drive and gearshifts.

Check driver in ATF pump gear –  Check if the drivers -arrows- at ATF pump gear have traces of pressure or are broken, if necessary replace the ATF pump. Causes: A -  When installing gearbox or engine, the torque converter is not fully inserted B -  Centering bush for torque converter in crankshaft is not inserted   Caution Broken off drivers must be searched for in each case and removed.

Check quantity regulating valve in the ATF supply Check the quantity regulating valve as follows: –  Move the valve piston against the spring force. l  The valve piston must have a smooth operation in both movement directions -arrow-. l  The valve must have no scoring. l  No swarfs must get caught in the opening -1-.   Note There is no drive if the valve piston catches or opening -1- is blocked.

Check brass bushes of stator shaft for wear –  Check the contact surfaces of the brass bushes -arrows- inside the stator shaft for wear. l  The contact surfaces must not have any major scoring and/or blue colouring. In case of major scoring and/or blue colouring: –  Replace the stator shaft → Electronic Catalogue of Original Parts. If the contact surfaces have no blue colouring and only minor scoring, then proceed as follows: –  Pull sand paper with graining 600 oiled once to twice over the contact surface. –  Carefully wipe off with a clean cloth and check the contact surface. l  The contact surfaces must now be like new. If so, do not have the scoring eliminated: –  Replace the stator shaft → Electronic Catalogue of Original Parts.

Check rectangular rings for clutch “B” for wear   Note The rectangular rings are always replaced. The quality of the thrust surface for rectangular rings can be determined from the wear of the rectangular rings. Therefore a wear assessment of the rectangular rings is unavoidable. If the rectangular rings have a major axial wear of more than 0.3 mm -arrow 1- (a slight wear of the outer corners is normal): –  Replace the stator shaft → Electronic Catalogue of Original Parts. If the rectangular rings have a major radial wear of more than 0.3 mm -arrow 2- (as comparison measure the thickness of the new rectangular ring): –  Replace the cylinder “B” → Chapter.

Check rectangular ring for clutch “A” for wear   Note The rectangular ring is always replaced. The quality of the thrust surface for rectangular ring can be determined from the wear of the rectangular ring. Therefore a wear assessment of the rectangular ring is unavoidable. If the rectangular ring has a major axial wear of more than 0.3 mm -arrow 1- (a slight wear of the outer corners is normal): –  Replace the stator shaft → Electronic Catalogue of Original Parts. If the rectangular ring has a major radial wear of more than 0.3 mm -arrow 2- (as comparison measure the thickness of the new rectangular ring): –  Replace the cylinder “A” → Chapter.