Date Wheel Swapping for Hublots or similars

[Francisco]

How to swap the date wheel (DW) on A7750 has been discussed a lot on rep forums and there are some tutos available. However, the swap is quite more difficult when the A7750 has the minutes at position 3 (a modified A7750). This tuto shows the issues to take into account in this case.

The example shown here is a HBB with DW with original black text and white background. The owner wants to install a DW with white text and black background.

The final result will be this:

PROCEDURE

As always, hands and dial must be removed:

Following picture shows the mechanism when the dial is removed. As seen, the modification to move the minutes from 12 to 3 is above the DW, and it has to be removed to swap the DW. The mod consists of 3 gears.

To remove the mod, the 2 screws marked have to be removed. After removing the plate fastened by these 2 screws we will see this:

Next step is to remove the 2 gears located more to the right, with no difficulty. However, when assembling, later, central gear, it is easy to confuse top and down faces. That is the reason I marked top face with a black marker (red circle).

The two gears removed:

Now we have one of the new problems in comparison with the standard DW swap: removing the gear at 12. This gear is pressed on the minutes output pin

[Logan]

Great post, I always wondered exactly how those wheel removers worked

[Francisco]

Great post, I always wondered exactly how those wheel removers worked

me too, beause instructions are wrong!

[HunterBL]

another great post, thanks