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Hardest Repair to Date

jdrichard
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jdrichard Distinguished Member

jdrichard

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So it started with the purchase of this Hamilton 912.da053e496ada03fe047867d10c30482c.jpg

It had a loose balance and upon examination one of the pivots was broken. So off I went to eBay to order a 3050 balance staff. Three came in the mail.

I started by removing the hairspring from the balance and then removed the roller plate with Impulse Jewel and safe roller. 2ded6482cad2e37300638e6b03c49f86.jpg936926bbfe7f047bed59f23db34328ba.jpg

I then got out my roller remover and punched out the roller and safety roller.eb995bce56af5f2b42a8eb0038e75c85.jpg06cafdabc9ecb31ed469599e12ed87e2.jpg

Then I took the staff and balance and fit the balance and staff in my Staking set; flat arms on the balance flat against the Staking tools plate. I then got out my NEW staff remover.76d0cac733a4bf6ee48250a7eb87bb26.jpg

I then made a YouTube on how to use the tool.

After I punched out the old stake I staked in a new one56af9e7b17d68b304b037952bd7e3093.jpgc717746bf93a003f7e20940107fb4420.jpg

Did a good job. The next step was to put the double rollers back. That is when I noticed that the roller jewel was loose. I got out my combination tools and shellacked the jewel and tested that it was now in good. I then staked in the rollers and moved on the put the hairspring back on. I did so and noticed that the collet was cracked. I had another old Hamilton movement and started farting around with the two hairsprings. Need to use the older one so I cleaned in and installed in and put the balance back in.585bb1916ca480679c527fe9a028271e.jpg

Now the fun started. When I tightened down the balance cock the bottom pivot of the balance staff was too big ( my mistake) and it cracked the lower jewel. So I went into my collection of jewels and found and Illinois lower balance jewel that was the right hole size and also fit the opening. I installed it oiled in and screwed on the cap jewel. Reinstalled the balance and had to take it off again and take off the hairspring and straighten it a bit as it was touching the balance arm. So once I had in all in place I noticed that the balance was not down far enough to allow the upper pivot to extend into the jewel hole. So I took a slice of watch paper and wedged it into the back of the balance. Finally that did it and with a little work in the Banking Pins I was able to get a beat. About 200degree turn is all I could get, but I had no energy left to try and get more. A new crystal is now on order and the watch works fine. What a day.19b73ff7c68b77410bbc3c0da09debf9.jpgPaper jammed in.4cd92bb517c54283b4ee1369f0f06ca0.jpgHappybecf9e8f861de2dab8e05a57f8b54f5f.jpg

 

 

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