Seth Thomas Sonora 89AG

Darrmann39

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Dec 6, 2020
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I'm servicing this Seth Thomas 89Ag is mine and found it odd how the sides that have nuts on it isn't the side you need to have up when taking the plates apart
I did but quickly realized I would not be able to put it together that way. Or maybe I'm missing something. The backplate has the only nuts but also had 3 activating rods which come thru that will be almost impossible to slide all 3 in at once.

20230601_140019.jpg
 

Willie X

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Feb 9, 2008
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Just start them through their respective holes from the inside and lower the plate down as you normally would. Willie X
 

Darrmann39

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Just start them through their respective holes from the inside and lower the plate down as you normally would. Willie X
just seems it will be damn hard to get all three of those threw the holes then try to lower it down with 6 different arms branching of the main 3 then into proper position.

20230601_142019.jpg
 

Dave T

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Dec 8, 2011
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It'll go eventually! One thing I've never figured out yet is how to put one together without scratching up the inside of the plates around the pivot holes, and getting my fingerprints all over the plates.
 

Bruce Alexander

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Feb 22, 2010
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Reassemble the movement upside down. It's a little tricky, especially with the mainsprings but you'll be able to get the control arms/levers in place first as you then reassemble the gear trains. Hope that makes sense.

Good luck
 

Darrmann39

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The levers don't have to be in their pivot holes, on either end, front or back. You can work all that out as you go. Willie X
Yea thanks I got it. I put the top one in with all the other parts on backplate Then put the other 2 lower ones arms thru the top plate and worked them in. Wasn't easy but it worked.

1685713247141883549795840333955.jpg
 

Darrmann39

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Dec 6, 2020
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Reassemble the movement upside down. It's a little tricky, especially with the mainsprings but you'll be able to get the control arms/levers in place first as you then reassemble the gear trains. Hope that makes sense.

Good luck
I really thought about doing that first but thought I'd give what Willie said a try with a modification of working top one in in place and I got it.
 

Jess19721

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Apr 3, 2022
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just seems it will be damn hard to get all three of those threw the holes then try to lower it down with 6 different arms branching of the main 3 then into proper position.

View attachment 764661
I just did a Sessions that is like that and it IS damn hard! Lol. But if you do like Willie said and go from bottom up, tightening down the bottom two nuts a bit after you have the bottom levers in their holes, you will get there. I swore. A lot.
 

R. Croswell

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Apr 4, 2006
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Reassemble the movement upside down. It's a little tricky, especially with the mainsprings but you'll be able to get the control arms/levers in place first as you then reassemble the gear trains. Hope that makes sense.

Good luck
That's the way I do it. I don't recall there being any special difficulty, but it has been awhile.

RC

sonora-assembly.jpg
 

Uhralt

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Sep 4, 2008
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Reassemble the movement upside down. It's a little tricky, especially with the mainsprings but you'll be able to get the control arms/levers in place first as you then reassemble the gear trains. Hope that makes sense.

Good luck
That's how I did it.

Uhralt
 
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