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What did I do wrong with these keyless works?

DoctoralHermit
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DoctoralHermit Member

DoctoralHermit

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Hello again! from the Mockba bench! For those of you who haven't seen my previous posts, this is a 1950s Mockba watch made in the First Moscow Watch Factory. It's my first build, and I'm really excited that I've made it this far, but the keyless works appear to be an impasse. I would greatly appreciate your help!

I've assembled the keyless works, as seen in the attached pictures, but I cannot push the crown or pull it out at all.

 

Here's some details on what I did to assemble the keyless works:

 

1. Pushed in the crown all the way

2. Put the clutch lever in the groove of the clutch

3. Pushed the clutch outwards as far as it can, which also moved the clutch lever and the set lever

4. Wedged the lever spring against the clutch lever so it stores potential energy

5. Screwed down the cover plate, ensuring that the little peg sticking down from the arm of the cover plate is pressed against one of the notches (which I assume is for this purpose) of the set lever

 

Any idea why the whole thing seems to be firmly affixed, but so much that the crown cannot be pulled out at all? Thank you!

M2JVJiNMScK+UQidZKC+UA_thumb_13f9.jpg

+s+BvVe0TtadcaWRVeavqw_thumb_13fa.jpg

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HSL Distinguished Member

HSL

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I haven't worked with this  ROEDA Watch movement but I Think you have to lift the detent spring to the other side of the pin on the setting lever.
I assume there also is somekind of spring too underneath the setting bridge which pushes on the yoke forward.

POBEDA.png

Edited by HSL
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DoctoralHermit Member

DoctoralHermit

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52 minutes ago, HSL said:

I haven't worked with this  ROEDA Watch movement but I Think you have to lift the detent spring to the other side of the pin on the setting lever.
I assume there also is somekind of spring too underneath the setting bridge which pushes on the yoke forward. 

POBEDA.png

Yes, there is a spring that is pushing on the yoke lever, and I believe it has been placed properly.

 

I'm sorry, I didn't quite understand the part about the pin and the setting lever. Does this mean I have to screw down the cover plate when the crown is pulled out, so that the setting lever is in a different position?

Edited by DoctoralHermit
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oldhippy Distinguished Member

oldhippy

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I don’t see any sign of any oil or grease. It just might be its hard to set because of lack of lube. One other thing, check you have screwed in the correct length screws, if you have put in the wrong screw it could be fouling the setting lever. Have you oiled the cannon pinion? if not you might strip the teeth of the wheels when it comes to setting the hands.  

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DoctoralHermit Member

DoctoralHermit

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I really wasn't sure what to lubricate, so I lubricated the crown a bit, along with the point where each wheel contacts the pivot. Are there other places I should lubricate?

Also, to be more specific, I'm unable to pull the crown out at all, it's not necessarily winding that is the issue. Could this be affected by a lack of lubrication as well?

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DoctoralHermit Member

DoctoralHermit

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13 hours ago, oldhippy said:

I don’t see any sign of any oil or grease. It just might be its hard to set because of lack of lube. One other thing, check you have screwed in the correct length screws, if you have put in the wrong screw it could be fouling the setting lever. Have you oiled the cannon pinion? if not you might strip the teeth of the wheels when it comes to setting the hands.  

Also, I am quite certain that I have put in the correct length screws... I recorded screw length on disassembly. The one that goes through the eyelet on the setting lever is a distinct screw, as I believe it's the screw that you use to release the crown from the movement.

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  • 7 months later...
DoctoralHermit Member

DoctoralHermit

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I finally took on this project again! Thank you all for your excellent advice so far. This has been my first time dissembling and assembling a watch, and it has been a great learning experience for me.

I got the keyless works assembled in what I think is a somewhat correct way. Then the following happened:

  • I pulled out the crown and pushed it back in with no apparent problems.
  • I wound the watch fully.
  • The watch was not beating.
  • I pulled out the crown, at which point the center wheel "unspooled" rapidly, expelling all the energy.
  • I pushed the crown back in and attempted to wind it, but the crown would now not turn in the winding direction.

Any idea what happened? What I should do next?

Also, for the sake of creating a database of movement photographs (as was mentioned by a user above), I've attached a photograph of (what I believe to be) the correct assembly for the keyless works.

IMG_2131.jpg

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jdm Distinguished Member

jdm

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10 hours ago, DoctoralHermit said:
  • I pulled out the crown, at which point the center wheel "unspooled" rapidly, expelling all the energy

Pallet fork was not fitted correctly. That is a very crucial step which must always be followed by verification. Inspect it very carefully, if lucky it will be undamaged.

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DoctoralHermit Member

DoctoralHermit

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2 hours ago, jdm said:

Pallet fork was not fitted correctly. That is a very crucial step which must always be followed by verification. Inspect it very carefully, if lucky it will be undamaged.

Excellent, thank you! Fortunately I have two other identical ones if I did break this one.

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