Skoda Workshop Service and Repair Manuals

Installing mechatronics for double clutch gearbox -J743-; gearbox removed. Special tools and workshop equipment required t  Assembly lever -T10407- t  Guide bolt -T10406- In case of oil leakage from the mechatronics, the mechatronics must be replaced → Electronic Catalogue of Original Parts. The »new«mechatronics for the gearbox is already precisely filled with oil at the factory. Therefore, it is only possible to fill the mechatronics with oil at the factory.   Note t  The mechatronics is allocated according to the gearbox code letters → Electronic Catalogue of Original Parts. t  The »new«mechatronics for the gearbox is already precisely filled with oil at the factory, do not drain the oil. t  The »removed«mechatronics is sent back with oil (close the ventilation opening with a suitable plug). The mechatronics remains filled with oil

–  If this is not yet the case: Close the ventilation with a suitable screw plug so that no oil can flow out.

t	Make sure that all the shift forks are in the »centre position« before installing the mechatronics for double clutch gearbox -J743-.

t	The »centre position« is shown in the illustration as position -N- (neutral).

t	No gear is engaged in this position, i.e neutral (neutral position) is engaged.

–	First check all 4 shift forks by hand.

All shift forks have 3 positions:

t	Gear engaged

t	Neutral -N-

t	Gear engaged

–	Consecutively bring all 4 shift forks once into each position -arrows-, if necessary turn a little on the pinions.

–	Then bring all the shift forks again into the »centre position«, position -N-.

N -

Neutral

R -	Reverse gear

t	When the reverse gear is engaged, the extended tappet of the mechatronics is hooked on the gearbox housing.

t	Therefore, the mechatronics must be put into the removal position by hand → Chapter.

1 -	first gear

2 -	second gear

3 -	third gear

4 -	fourth gear

5 -	fifth gear

6 -	sixth gear

7 -	seventh gear

–  Screw in guide bolts -T10406- by hand.

Adjust gear actuator:

Caution Risk of damage mechatronics for double clutch gearbox -J743-. When removing the pins, do not press the senders.

–	Set the 4 gear switches on the rear side of the mechatronics for double clutch gearbox -J743- into the specified position.

Specified position: -a- = 25 mm

Note t  Clean the sealing surface on the gearbox housing on which the mechatronics will rest at a later stage. t  Oil residues on the sealing surface can lead to the wrong diagnosis »leaking« at a later stage.

t  The seal for mechatronics for double clutch gearbox -J743- must be attached all around. –  Check the sender. The clip must not be damaged. –  Install mechatronics. When handling and installing, make sure that the shift forks are not unintentionally pressed out of their position. Also pay attention to the engaging lever and the tappet of the mechatronics.

–  Screw in the screws -A- (3 pieces, M8 x 35) and -B- (2 pieces, M8 x 90) crosswise by hand. –  Remove guide bolts -T10406-. –  Screw in the remaining screws -B- (2 pieces, M8 x 90) by hand.

Make sure that the tappets grip precisely into the engaging lever bearing. Pull out the tappets by hand until they fit in these bearings. –  Now check the position of the tappets once again.   Note

t  Incorrectly mounted tappets will damage the mechatronics. t  The tappets can be put into their correct positions by means of a hook made from welding wire.

–  Tighten all the screws for the mechatronics for double clutch gearbox -J743- crosswise to the recommended tightening torque → Chapter. –  Turn the assembly lever -T10407-»slowly and carefully« to the right and remove it. l  Both clutch adjusters must correctly lock in the recesses of the engaging levers for the clutch. l  While doing so, the rubber grommets of the clutch actuators should not be damaged. l  The rubber grommets must rest on the mechatronics. l  An incorrect assembly or damage to the rubber grommets leads to oil leakage in the mechatronics. Vehicles Octavia II, Superb II and Yeti

–  Position the gearbox input r.p.m. sender -G182- in the -direction of arrow- on the gearbox housing. Vehicles Fabia II and Roomster

–  Insert the gearbox input r.p.m. sender 3 -G641- in -direction of arrow- in the gearbox housing. Continued for all vehicles   Note t  Look at the sender. The clip must not be damaged. t  The sender must be positioned completely and tightly with its tab on the gearbox housing. If the sender is »loose«, the clip is broken ⇒ replace the mechatronics.

–  Remove the screw plug from the ventilation and position the ventilation cap.

–  Install the cover against contamination above the engaging lever.    Tightening torque of fixing screws: 8 Nm