Replacement Movement for 31 Day Chinese Movement, D&A clock.

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ivork

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Okay, newb here, please bear with me.

I have a 31 day regulator clock with a Chinese movement. It is stamped with "WEIHAI P.S., MADE IN CHINE, NO JEWEL. The face is marked "D&A". It appears to have met a catastrophic end as I can see many bent and warped gears and posts in the movement. Anyway, I would like to replace the movement as the case is absolutely gorgeous. Unfortunately I have been unable to find this exact movement anywhere for sale on the internet. Could someone please help me figure out what I could use for a replacement movement or where I could find one of these. I'm aware that there are many factors that need to be given consideration such as the length of the pendulum and distance between the winding arbors and I'm sure much more. If someone could point me in the right direction I would be very grateful.

Thanks a bunch,
Todd

xyzzytom_247641

WP_20150113_19_13_20_Pro (2).jpg
 
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Willie X

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You may be able to find a Hermle that will replace it. Practically a zero chance for finding an exact replacement though. The depth of the new movement can be less but NOT more than the depth of the case. The key hole spacing will unusually have to be modified and it can be difficult to get exactly the right pendulum length. Hands and gong will have to be changed or the old ones modified. So, it's not an easy task but doable. You can always pop in a "C" cell quartz time and pendulum while you contemplate the situation.
Willie X
 

ivork

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Thanks, I was afraid it would be something that was more trouble than it was worth. I really am attached to having a mechanical movement though. Hate to see a good case go to waste though. Perhaps I will have to give it some thought. Do you think a movement like this could be repaired? I bet finding the right parts would be just as hard.
 

Dave T

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If it were my clock I'd take some close measurements as far as clearances required are concerned, and find a replacement movement.

Might help if you posted a picture of the case.
 

ivork

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Okay, I took some measurements. They are diagramed on the attached photo of the case. Hopefully I didn't miss anything critical. If anyone has any thoughts that would be great.

Thanks,
Todd
31 Day D&A Regulator.jpg WP_20150114_20_58_53_Pro (1).jpg
 

Tinker Dwight

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Can we see some pictures of the damage. The case is
niece. I'd want to get it working again.
You might watch ebay for movements. If you find
a similar looking one, you might get enough parts
to make one hole one.
Look for 31 day movements on ebay, there is a parts
one there now that may have the pieces needed.
Tinker Dwight
 

ivork

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Tinker, I'll check and see if I still have photos from when I had the movement out of the case and before I attempted repairs. I actually took it apart at one point and straightened out the damaged parts but it won't stay running. It was REALLY messed up. Thanks for the advice on Ebay, I've been searching periodically but haven't really seen anything yet. I will continue to look.
 

ivork

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Can we see some pictures of the damage. The case is
niece. I'd want to get it working again.
You might watch ebay for movements. If you find
a similar looking one, you might get enough parts
to make one hole one.
Look for 31 day movements on ebay, there is a parts
one there now that may have the pieces needed.
Tinker Dwight
I think I found the one you were referring to on ebay. It appears to be identical. Thanks for the heads up.
 

Tinker Dwight

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I think I found the one you were referring to on ebay. It appears to be identical. Thanks for the heads up.
Do look with care, I don't know which wheels are damaged.
The lower wheels, nearer the main springs, are often the same
but the last two are usually specific to that movement to
set the rate of the clock. If it is intended for a different
pendulum length, these last wheels will often be different.
I've been assuming your clock has damage from a failed
main spring.
That is why I asked about a picture of the damage.
Also, if you intend to work on it your self, you haven't
indicated what clock knowledge you have.
This is a striking movement and one needs to understand
how these work before taking one apart. Although, the parts
for the most part only go back together in one order,
the rotation of each in relationship to the other is important.
You also need to know how to let down the main springs
safely. If you disassemble the movement with power,
it will not only damage the remaining good parts, it will also
be dangerous to you.
Tinker Dwight
 
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ivork

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Jan 14, 2015
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Do look with care, I don't know which wheels are damaged.
The lower wheels, nearer the main springs, are often the same
but the last two are usually specific to that movement to
set the rate of the clock. If it is intended for a different
pendulum length, these last wheels will often be different.
I've been assuming your clock has damage from a failed
main spring.
That is why I asked about a picture of the damage.
Also, if you intend to work on it your self, you haven't
indicated what clock knowledge you have.
This is a striking movement and one needs to understand
how these work before taking one apart. Although, the parts
for the most part only go back together in one order,
the rotation of each in relationship to the other is important.
You also need to know how to let down the main springs
safely. If you disassemble the movement with power,
it will not only damage the remaining good parts, it will also
be dangerous to you.
Tinker Dwight
A little background here:
This was my parents clock and they said they heard a loud racket in the living room one evening and discovered that the clock had stopped working... I assume that was the spring uncoiling. Anyway attached is the photo I took at the time. Unfortunately it does not show all the damage that I found once I had dissembled the movement. If I recall correctly MOST of the damage was pretty close to the main spring that had failed. Taking pictures now would be of no use since I have already repaired and reassembled it.

To answer your question about experience. I have fixed several Regula movements and restored some cuckoos, that's about it. I figured out what most of the parts did by watching one run while outside the case. These mechanical movements are really quite simple. I also usually take lots of pictures during tear down and yeah, they're a pain to get back together properly... wish I had the right tools. Anyway, I did my homework before I disassembled this particular movement and was aware of the potential stored in the spring and took appropriate precautions. Your concern is very valid and it is appreciated. Unfortunately, while it keeps good time, I cannot keep it running for more than a week or so at a time.

Thanks a bunch for all the advice and here's the pic.

Todd

IMG_20130203_143355.jpg
 
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Willie X

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Failures are usually due to the crude design of the ratchet. Personally, I haven't seen one that crapped out that badly. Was ther colateral damage? Shouldnt be difficult to pick another movement for a barrel and second wheel. This movement was made all the way back to 1962. Maybe furthur but that's the oldest one I've seen.
Willie X
 

ivork

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Jan 14, 2015
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The ratchet is fine, no idea why it failed. There was no collateral damage other than the miscellaneous movement parts. I'll see if I can get a cheap donor movement on ebay then. I see there is one now that looks identical. Prior to joining the forum I hadn't seen one on ebay. Who knew! Thanks for your time and expertise.
 

Tinker Dwight

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There are two on ebay that look similar. As I said, the lower end
wheels should be interchangeable.
If the spring is intact on the one you have, it is one of two things,
it is either the ratchet click didn't catch all the way or a bushing
so warn that the wheel slipped. I suspect it is the click. Most people
are not careful about winding to ensure there is noticeable back
turn before catching.
I'd think you should be able to make it work with the donor
parts. It sounds like you understand the basics of these movements
well enough. The rack and snail design is the same as a cuckoo.
Tinker Dwight
 

Tinker Dwight

Registered User
Oct 11, 2010
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One other possibility, The spring could have come
off the winding arbor. This may indicate a weakness
there. Make sure and replace all the suspected pieces.
Tinker Dwight
 

harold bain

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One other possibility, The spring could have come
off the winding arbor. This may indicate a weakness
there. Make sure and replace all the suspected pieces.
Tinker Dwight
Also check that your key is a good fit on the wind arbor. Too loose and it can slip while winding.
 

DOODLEBUG II

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Jan 13, 2021
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Okay, newb here, please bear with me.

I have a 31 day regulator clock with a Chinese movement. It is stamped with "WEIHAI P.S., MADE IN CHINE, NO JEWEL. The face is marked "D&A". It appears to have met a catastrophic end as I can see many bent and warped gears and posts in the movement. Anyway, I would like to replace the movement as the case is absolutely gorgeous. Unfortunately I have been unable to find this exact movement anywhere for sale on the internet. Could someone please help me figure out what I could use for a replacement movement or where I could find one of these. I'm aware that there are many factors that need to be given consideration such as the length of the pendulum and distance between the winding arbors and I'm sure much more. If someone could point me in the right direction I would be very grateful.

Thanks a bunch,
Todd

xyzzytom_247641

View attachment 247642
Would consider selling the movement? I have one just like it.
 

Steven Thornberry

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Would consider selling the movement? I have one just like it.
I'm not sure what you are getting at, but we do not allow buying and selling on the NAWCC Forums.
 
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