Date Wheel Misaligned

[Lawren5]

Below is a Tissot Sideral watch in which the date wheel does not align properly in the window. There is a small black date wheel driver located at the "1" position but there doesn't appear to be any way of adjusting it. This watch has seen a lot of use so I'm wondering if it's just worn parts.

[watchweasol]

Hi There is a distinct possibility that it is wear, but could also be the detent or detent spring. Does this happen on every date change, and does it happen when you manually change the date ?.  Whai is the make and caliber of the watch. Usually found under or near the balance/balance cock.

[Lawren5]

The watch is a Tissot with the 784-2 movement. The misalignment occurs on all dates regardless of manual change or normal operation. The detent spring appears good.

[watchweasol]

Hi   If it happens  on manual as well as automatic it is pointing to the drive being worn and not completing  the change over. I Think thats the place to start.  

I have enclosed the tech sheets relating to this watch.

2789_Tissot 781,782,783,784.pdf 2791_Tissot 783.2,784.2.pdf

[Nucejoe]

Refer to the pic you posted. Date dial is pushed outward at day 24 and inward at day 14. Stretch the spring behind the pawl wheel at day 1st. See if it helps. 

 

[Lawren5]

Nucejoe, thanks for your comments. It's not obvious in the photo but the plate between 22 and 19 helps keep the date wheel in place and aligned. Because of this, the date wheel can not be moved in any further. It may actually improve things if it was moved outward as it would allow the pawl on the opposite side of the movement to better engage the date wheel. The wheel appears to be brass and I suspect the date misalignment is due to wear against the steel.