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HAMILTON 917 MOVEMENT 
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Post HAMILTON 917 MOVEMENT
Hello everyone
I have a Hamilton 917 movement and I have to say it is beautiful. It has a spectacular finish level.
But he has a problem: the movement works hard and does not stop, but the hands do not move. I have tried to force the hands, and remain meshed. :?
Any idea of what happens?


Thu May 18, 2017 5:54 am
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Post Re: HAMILTON 917 MOVEMENT
My first question would be, is easy to set the time, like almost no resistance at all? In that case the cannon pinion has too little friction, meaning it sits loose on the center wheel arbor. I am almost certain that this is the issue.


Thu May 18, 2017 6:02 am
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Post Re: HAMILTON 917 MOVEMENT
Yoda wrote:
My first question would be, is easy to set the time, like almost no resistance at all? In that case the cannon pinion has too little friction, meaning it sits loose on the center wheel arbor. I am almost certain that this is the issue.

What to do if that is the case? New cannon pinion or existing one could be fixed?


Thu May 18, 2017 8:15 am
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Post Re: HAMILTON 917 MOVEMENT
There is a tool for it, the receiving part looks like a "V" and the "punching" part is more like a point to make a mark in the "waist" of the cannon pinion.

Whether you use a tool or not, always insert a piece of tapered steel (a needle can be used) in the cannon pinion to prevent it from being crushed/flattened. It is possible to do the same thing with a pair of pliers/clipper, but with great care and I only recommend this if you know what you are doing and know how to do it.

Don´t forget to oil before fitting the cannon pinion again, it will prevent too much friction and especially wear.


Last edited by Yoda on Thu Jun 08, 2017 2:23 pm, edited 2 times in total.



Thu May 18, 2017 8:42 am
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Post Re: HAMILTON 917 MOVEMENT
Is this something you have in mind? To quote the author "If you are however an occasional "weekend watchmaker" then it's a problem to buy all those tools."

Image
Photo taken from http://cgi.linuxfocus.org/~guido/molnija-pocket-watch/

I am actually having the same problem with several Cortebert movements. They seem to be prone to cannon pinion "loosening" problem.


Thu May 18, 2017 12:11 pm
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Post Re: HAMILTON 917 MOVEMENT
As long as you insert the tapered steel rod, you are safe. Insert it a bit loose and squeeze carefully.


Thu May 18, 2017 12:37 pm
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Post Re: HAMILTON 917 MOVEMENT
Tx Yoda english is not my first language so i have troubles understanding particular details.
Watchmakers here are using german names for movement parts and tools. So it is minutenrouhr and stundenrad.


Thu May 18, 2017 12:51 pm
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Post Re: HAMILTON 917 MOVEMENT
Ach so, entschuldingung!

Minutenrohr bist cannon pinion, what the minutenzeiger sits on.

Keep asking if you don't understand.


Last edited by Yoda on Thu May 18, 2017 2:03 pm, edited 1 time in total.



Thu May 18, 2017 1:03 pm
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Post Re: HAMILTON 917 MOVEMENT
Vielen dank


Thu May 18, 2017 1:23 pm
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Post Re: HAMILTON 917 MOVEMENT
Djolea wrote:
Vielen dank


Bitte


Thu May 18, 2017 2:04 pm
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Post Re: HAMILTON 917 MOVEMENT
Mi no entender :mrgreen: :silent:


Fri May 19, 2017 3:02 pm
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Post Re: HAMILTON 917 MOVEMENT
Es una bebida :D

Danke!

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Fri May 19, 2017 4:10 pm
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Post Re: HAMILTON 917 MOVEMENT
Basically, the pinion of the central wheel barrel "skates" on the axis of said wheel?
If so, perhaps making a small notch with a pliers on that axis, would solve the problem? (My know-how watchmakers are limited to shattering movements)


Sat May 20, 2017 1:06 am
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Post Re: HAMILTON 917 MOVEMENT
First of all my watchmaking skills are pretty much as yours and I rely heavily on internet so check this out http://www.timezone.com/2002/09/16/the-motion-works/ Walt Odets has a deeper understanding of watchmaking.
As far as I can understand center wheel axis and cannon pinion must have a tight fit. If not cannon pinion wont spin, driving minute hand, along with center wheel axis which is moving correctly as the watch gear train is working fine. Therefore reducing inner diameter of cannon pinion is the solution, at least I think. Making the the notch will further reduce the diameter of cw axis and result in even looser fith between cp and cw axis.


Sat May 20, 2017 2:04 am
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Post Re: HAMILTON 917 MOVEMENT
Djolea wrote:
Yoda wrote:
My first question would be, is easy to set the time, like almost no resistance at all? In that case the cannon pinion has too little friction, meaning it sits loose on the center wheel arbor. I am almost certain that this is the issue.

What to do if that is the case? New cannon pinion or existing one could be fixed?


The cannon pinion needs too be tightened.


Sat May 20, 2017 7:47 am
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Post Re: HAMILTON 917 MOVEMENT
antonio651900 wrote:
Basically, the pinion of the central wheel barrel "skates" on the axis of said wheel?
If so, perhaps making a small notch with a pliers on that axis, would solve the problem? (My know-how watchmakers are limited to shattering movements)


There is a mark on the cannon pinion, that's where you tighten it. Never touch the center wheel arbor.


Sat May 20, 2017 7:59 am
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Post Re: HAMILTON 917 MOVEMENT
Yoda wrote:
antonio651900 wrote:
Basically, the pinion of the central wheel barrel "skates" on the axis of said wheel?
If so, perhaps making a small notch with a pliers on that axis, would solve the problem? (My know-how watchmakers are limited to shattering movements)


There is a mark on the cannon pinion, that's where you tighten it. Never touch the center wheel arbor.
I Think it's going to be more complicated than I thought. Maybe it's time to ask for help ...


Sat May 20, 2017 3:07 pm
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Post Re: HAMILTON 917 MOVEMENT
I have always done things like that for free, shipping cost only.


Sat May 20, 2017 3:42 pm
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Post Re: HAMILTON 917 MOVEMENT
Yan I found watchmaker. The movement is heading for a good home


Tue May 23, 2017 11:16 am
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Post Re: HAMILTON 917 MOVEMENT
antonio651900 wrote:
Yan I found watchmaker. The movement is heading for a good home


Great! Where, who? :shock: Haha!


Tue May 23, 2017 11:46 am
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