Jump to content

Recommended Posts

Posted (edited)

Hello dear watch repairers.

I am disassembling a vintage citizen caliber 0200.

It is a manual wind caliber with 21 jewels.

I usually do not have much problem disassembling simple movement like this.

However, the rachet wheel screw is very stiff and won't move at all.

I tried to unscrew it anti-clockwise with nicely fitting screwdriver but it is stuck.

Actually I have an bad experience with a citizen movement like this before.

It was cal.1801, very similar to 0200 and only difference was the date function. 

I had same issue with the rachet wheel screw and I ended up breaking the screw. The head part of the screw came apart.

Is this a typical issue with citizen calibers?? or am I doing it wrong??

Please help me out!

Citizen_0200.jpg

caliber 0200.

23.jpg.ba3c5f2af28e376b01a2e922cbcf7271.jpg

Edited by east3rn
Posted
1 hour ago, JohnHutchins said:

Doesn't the triple slot screw indicate that it is reverse threaded and requires unscrewing in a clockwise direction?

 

Agreed, that is what it looks like to me. I have never seen that screw with left hand thread BUT, the screw head does indicate that it is.

Posted

Is it triple slotted?  It looks strange in the picture, but the crown wheel screw is the typical triple slotted appearance to me.  However, it cannot hurt to try to coax it in the wrong direction gently.


RMD

  • Like 1
Posted
44 minutes ago, rduckwor said:

Is it triple slotted?  It looks strange in the picture, but the crown wheel screw is the typical triple slotted appearance to me.  However, it cannot hurt to try to coax it in the wrong direction gently.


RMD

Sometimes tightening can be an aid to loosening....as strange as it seems.once a screw is moved one way it can usually be moved the other...just don't go king kong on it

Posted (edited)
4 hours ago, clockboy said:

Its a reverse screw thread. In fact both screws shown are.

 

6 hours ago, JohnHutchins said:

Doesn't the triple slot screw indicate that it is reverse threaded and requires unscrewing in a clockwise direction?

 

Oh I see that I was unscrewing in the wrong direction..

Actuallly I tried both directions but unscrewing clockwise is difficult because the rachet wheel moves as I try to unscrew the 

rachet wheel screw since the click does not lock in that direction.

Is there an effective way to unscrew it??

Edited by east3rn
Posted

You have to block the ratchet wheel with a block of wood..

On this movement Citizen marked the wheel with 3 lines as per industry practice but on earlier ones they (both) are not.

Nice movement, I particularly like how smooth it winds.

Anilv

  • Thanks 1
  • 3 weeks later...
Posted

Dear all,

Is there any (printed or PDF) material available on (dis)assembly of these old mechanical Citizen movements?

All the best,

Bert

  • 1 month later...
Posted

... and of course putting it back together.

 

Finally for those of you with a strong stomach, this is what can happens if you drop your watch on to a hard surface.

 

 

RIMG1099.thumb.JPG.e51bb5c9fea0c6d33c42f6cbd37ca6c3.JPGRIMG1101.thumb.JPG.b74d443e5c5a5db3a274b7e60d8b4725.JPG

I include these pics, because this is a very similar HMT/Citizen movement. 

That poor shattered barrel bridge is not happy, nor is the folded fourth wheel. I think I will have my work cut out getting this going again.


 

 

Posted

.. and finally lubrication etc.

.. there are a few "quirky practices", shall we say, in these videos, but they do give a good rundown of disassembly and re-assembly of a very similar, in fact almost identical movement to your Citizen.



  • Similar Content

  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Did you just swear at me matey?? I’m sorry, I’m not divulging personal information but there’s always personal reasons. There’s not much more than I can do other than plod along as best I can. However, my health is good now and I’m regularly getting plenty of exercise to keep it that way 👍 You know what. The ads don’t even cover a small percentage of what it costs to serve this site. I find most of it personally. If there are complaints then so be it. I do my best.  in fact - I have zero issues turning them off. Would that make the complainers happy?
    • Same question that was asked last time Hakan, and emphasis was placed on it. It was ignored. The thread should still be there, if not I have a copy of his reply. 
    • This is probably the single most important point. One of my best friends, 48 years old at the time, suffered a massive stroke about 15 years ago. He barely survived, but his life was never the same after that. If you had asked me back then to guess which of my friends might have a stroke and nearly die, he would have been the very last one I'd have picked. He was perfectly healthy, played tennis three times a week, ran a successful business, was full of life, and had a wonderful wife and well-behaved teenage kids. The harsh truth is, we never know when it’s "game over." @Mark, I truly wish you a long, happy, and successful life. But have you given any thought to some kind of backup plan for WRT in case the worst should happen? Is there anyone who could keep the site going? If you can reassure us in some way, it would mean more than a lot to us!
    • Looks like glass with that bevel edge.
    • Update: The demagnetization only helped temporarily, maybe it pulled the wheels into a position where they liked each other. I have to adjust the sub second hand as it is a bit angled upwards and catching the minute hand stopping the whole movement but before this happened there were some wild deviations. HWGIKE#58 Alarm clock, cooked in hot cleaning fluid and oiled gently. This is a movement so I count it. 🙂 A while ago it tried to fly away one day, it was on my windows sill, we had strong wind the curtain flew like a flag and doing so encouraged my clock to do the same...  went out and ended up on the roof above the entrance door, its door in pieces but the clock itself suffered no damage otherwise. The original glass was already broken when I received it I still have the bottom part in two pieces. The new "glass" is acrylic. It also had a paper in the back in the case inside but it disintegrated, I still have a little bit of  piece of that too.     HWGIKE#59 Durowe 870 / Times M84 This particular instance is a D870, when I saw its worn out contact pin I thought that it must be a design flaw, and here we go: https://17jewels.info/movements/d/durowe/durowe-870/ An incredible movement again where the balance wheel drives the train and has two magnets one for the balance wheel/coil and one for the pallet. The magnet for the pallet is basically the "draw" one direction. The coil is about 1.8kOhm and one end is in contact with the main plate and the other end is soldered to a contact pin which is insulated by the means of putting it into a jewel and this contact pin is rubbing against a wire getting the energy/impulse as it is passing. Behind the contact pin there is an "impulse jewel" not sure why is it there... the wire seems to hit the impulse jewel first then the contact pin but maybe it is there only for insulation purposes? I was almost certain that the screw holding down the battery - (minus) clamp had no insulation washer.. i only noticed the green stuff around it coming from battery leakage... anyway the + and - had a shortcut which took me a while to realize.. had to fabricate one insulating washer on my own. The jewel settings were dirty but not it is all cleaned and oiled. The contact pin might work for a while but I am sure it has a short life. It is a front loader the whole thing is held together by the case so it is not possible to regulate it without putting it all together and taking the movement out of the case again, very inconvenient. A wonderful movement but not made for eternity only for the consumer market.  
×
×
  • Create New...