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 Post subject: Valjoux 23
PostPosted: Wed Jan 28, 2015 8:25 am 
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Hi all,

I have an old Bulova Chronograph with a valjoux 23 movement, when I aquired it I needed to replace the escape wheel (part number 705) but other than that the movement is the same. The problem I'm having is its fast, very fast. About 10 - 13 seconds a minute and I'm not sure what I can do to slow it down that much.

Can anyone help?

Thanks,

Chris


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 Post subject: Re: Valjoux 23
PostPosted: Wed Jan 28, 2015 9:37 am 
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If it's not magnetized then you have the wrong balance complete and / or mainspring. Try demagnetizing first.



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 Post subject: Re: Valjoux 23
PostPosted: Wed Jan 28, 2015 11:42 am 
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Ahhh thanks Roff that didn't even enter my mind, there was a few parts that kept sticking to my tools. I guess that proves I'm still very new to this.


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 Post subject: Re: Valjoux 23
PostPosted: Wed Jan 28, 2015 1:36 pm 
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Regulation of that degree can occur with a screwed balance wheel by adjusting the screws, but first step has to be to understand the underlying cause and address that, especially as adjusting / shaving screws is a PITA.


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 Post subject: Re: Valjoux 23
PostPosted: Thu Jan 29, 2015 4:22 am 
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I managed to dig out a compass last night and the compass dial definatly moved towards the watch when it was close so I'll have a look at getting it demagnatized first and let you know if it worked.


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 Post subject: Re: Valjoux 23
PostPosted: Thu Jan 29, 2015 12:43 pm 
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Perks wrote:
I managed to dig out a compass last night and the compass dial definatly moved towards the watch when it was close so I'll have a look at getting it demagnatized first and let you know if it worked.


Get one of these off eBay.

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 Post subject: Re: Valjoux 23
PostPosted: Fri Feb 06, 2015 5:47 am 
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Thanks Wessa, I purchased one of these it worked a little but the watch still shows magnatism when next to a compass. I tried demagnetising the balance on its own and saw that the hairspring was deformed. I demagnetised the balance and balance bridge then removed the hairspring and, after watching a YouTube video which was very helpful, I removed the bends from the hairspring. Once I got the balance lined up correctly the watch started working nicely. Thanks for all your help just need to check for time accuracy now.

I believe it was my own fault that the hairspring was misshapen but I guess we all have to learn some how.


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