Great thread!
I have a problem, maybe someone here can help.
The Problem: The reset of the chronograph is often very stiff, like if there is too much friction or if something is blocking/rubbing. Sometimes the pressure to reset the chronograph is normal (lightweight).
The Reset function:
As far as i understand there are basicaly 2 things affected when resetting the chronograph.
1) Caseback side: The pin (that holds back the hammer) slides out of the way and the hammer drops.
2) Dial side: the pusher stem for zero action is pushing the operating lever to the hour hammer, the pin slides by the hour recorder stop lever, pushing it out of the way and resetting the hour recording runner.
1)
2)
As far as i undersand, worn out hour recorder stop lever or the hour hammer pin woud cause the "lazy reset", so those would be not the reason for a stiff reset. Somhow doubt that the friction is cause by the sliding action from stem bolt releasing the chronograph runner (caseback side).
Here was mentioned that the cause could be worn movement holder ring like in the post above (which is not the case here).
So my guess would be, the problem is somewhere around the operating lever for the hour hammer. Like here mentioned: worn at either interface, slightly bent, chipped or the wrong type for the case.
Or like Archer wrote somewhere: "burr on the movement spacer making the operating lever difficult to move, or a bent stem bolt for hammer".
Would this be a correct assumption? Does anybody have any additional thoughts?
Thank you!
