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Hardest Repair to Date


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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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    • These types of hairsprings become weak with age and very fragile. Which I expect it is that giving you trouble, and that wheel is not the correct one, if it were not bent I don't think the movement would run as the teeth are not the correct height. The problem you have is price which depends on you. It can be repaired but is it worth it to you, because there is little value in the clock. A wheel can be made and hairspring replaced. Or hang on to it and keep looking on ebay which is your best bet for replacement parts or even a complete movement but it will be like finding a needle in a haystack. 
    • I did that also for a few movements - well, mainly in/around the train jewels. I made big efforts to epilame the mainplate WITHOUT getting Epilame into the Pallet fork jewels (where it's not supposed to be, right?). I made litte barriers with Rodico around that jewel and used drops from a syringe to apply on the rest.  However, I've now stopped doing this. For three reasons: 1. It's a hassle and consumes more of this liquid gold. 2. I didn't see the need when using HP1000/HP1300 lubricants and grease for most part. The two places where I'd use 9010 (i.e. escape wheel and balance) receive Epilame in specific places... or the cap-jewel-setting of the balance suspends the oil sufficiently be capillary action (see my "conflict" about using Epilame on the balance jewels).  3. Lastly, and here I really wonder about yours and others' experiences: I felt that applying Epliame to the train jewels left them looking hazy (borderline dirty) compared to the (painstakingly achieved) sparkly clean results of my cleaning process. I just can't help but think that the Epilame residuals would mix with the oil and cause more friction/wear. I don't know.    simple: it'll stay there. It won't move any further. That's exactly what is happening if you epilame a cap stone. You end up placing the 9010 right on top of the epilame and the oil will sit nicely on that spot.
    • There are some parts on Ebay for the seiko 6020A, it may just be a waiting game for someone to strip one down, NOS will be more scarce . K would strip your movement down to the module then start looking at other seiko movement to see if that coil is used, then seek out a seiko part dealer. Also Retrowatches youtube owner Mike may give you some advice try him on his site . He also hangs around amateur watchmaking groups.
    • I would agree, in order to work harden something you need to exceed it's yield strength when it moves from the elastic zone to the plastic zone and you get permanent deformation and work hardening which is fairly close to its failure point, relatively speaking and dependent on the material/alloy of course. In theory you can load something constantly within its elastic range and not suffer work hardening issues.
    • Probably easier to get a complete new movement - but CousinsUK list it as discontinued. Maybe someone on here knows a substitute movement ?
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