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Help with 6498 repair. 
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Joined: Mon Jun 14, 2010 11:57 pm
Posts: 1034
Country: Canada (ca)
Post Help with 6498 repair.
I was given a free 6498 in a bag (in pieces). :)

The owner had broken the stem off and decided to take the movement apart to remove the stem. I believe all the parts
in the bag came from the original movement.

I assembled the 6498 just to see if everything was there and to see if it would run.

The movement does not run. The issue appears to be with the the escape wheel tooth not clearing the exit pallet stone.

https://drive.google.com/file/d/0B-Rv8BsCPVX-WVJvU0lXMV9TZHc/view?usp=sharing

The escape wheel jewels and the pallet fork jewels appear to be in good condition.

I gave one of the banking pins a slight nudge and it helped a little, but it will take a bit more and I don't believe the banking pin is the answer to this puzzle. The pallet stones appear to be in their original positions.

There could be a chance this is not the correct pallet fork for the movement? Could the pallet fork be bent?

https://drive.google.com/file/d/0B-Rv8BsCPVX-cE9ub0NhOXJra1E/view?usp=sharing
https://drive.google.com/file/d/0B-Rv8BsCPVX-X25ZZ3RHcUU5SXc/view?usp=sharing
https://drive.google.com/file/d/0B-Rv8BsCPVX-TThqUEY3Q0hXYm8/view?usp=sharing


Maybe some of you might see something in these images, I should be looking at.

Cheers,


Wed Mar 01, 2017 6:26 pm
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Joined: Fri Mar 06, 2015 9:08 pm
Posts: 1106
Location: Ohio
Country: United States (us)
Post Re: Help with 6498 repair.
I think those pallet stones have been messed with. Notice the amount of shellac on the undersides of them? That didn't leave the Unitas factory that way. It's also possible that the lever of the fork is slightly bent but quite frankly there's just no way to be sure from those pictures. If you have another one you could lay them side by side and find out. I will say that I've never had to adjust a banking pin on a 6497 or 6498 that I can remember, they're usually good from the factory unless somebody screws with them somewhere along the line. Good luck!


Wed Mar 01, 2017 6:36 pm
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Joined: Mon Jun 14, 2010 11:57 pm
Posts: 1034
Country: Canada (ca)
Post Re: Help with 6498 repair.
Thankyou D.

I have another 6498 in a pocket watch. Maybe I will pull the pallet fork out of it to compare/try it. It seems to be my next logical step.

P.


Thu Mar 02, 2017 4:43 am
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