valjoux 7736 chrono hand will not reset

[quantieme]

Hi all, i have a nos 7736 but the chrono hand will not reset to 12, it always stops just short before or after, i have tried 5 times to remove and refit the hand by resetting and then keeping the pusher held in so i am thinking maybe there is an underlying problem. i am going to part service that part of the watch before i try again in the hope that might help as the movement has not been used in years but is there a way of using an eccentric to finely adjust the hand and if so where is it located, also does anyone know where i could get a proper chrono movement holder, i looked on cousins but all they had was 7750s so i bought one but it is to small. 

thanks

[Watchtime]

good question, maybe the more experienced guys can chime in?

[Delgetti]

Reseted to zero the hammer should press against the Heart of the Chrono Wheel and the wheel should really be fixed (Look from the side for a gap and try to rotate the wheel with a tooth pick). On the other hand there must be a small gap between the hammer and the heart of the minute counter Wheel.

 

[quantieme]

17 hours ago, Delgetti said:

Reseted to zero the hammer should press against the Heart of the Chrono Wheel and the wheel should really be fixed (Look from the side for a gap and try to rotate the wheel with a tooth pick). On the other hand there must be a small gap between the hammer and the heart of the minute counter Wheel.

 

thank you will check it out and than you for the diagram.

[HSL]

Here you have PDF version of the tech sheet , sometimes it's good to get an overview of the whole procedure ..
 

Valjoux-7733-7734-7736-technical-communication-service-manual-EBAUCHES-SA.pdf

Edited July 14, 2019 by HSL

[quantieme]

On 7/14/2019 at 10:10 AM, HSL said:

Here you have PDF version of the tech sheet , sometimes it's good to get an overview of the whole procedure ..
 

Valjoux-7733-7734-7736-technical-communication-service-manual-EBAUCHES-SA.pdf 4.62 MB · 5 downloads

excellent thank you

[rogart63]

Have you checked the second hand so it's not slipping on the tube or on the pivot. Seen some where the tube on the hand is a little loose.