Jump to content

Where can I get a replacement wheel for a Citizen cal C650?

GPrideaux
 Share

Recommended Posts

GPrideaux WRT Addict

GPrideaux

Posted
Posted

A colleague invited me to "have a look" at a Citizen Eco-Drive Skyhawk that has been sitting in his drawer for some time. The minute hand was 'stuck' at 20 minutes past the hour. Despite warning him of my total lack of experience with this level of complexity in a watch, he still gave me the go-ahead to see what I could do. After first confirming that the circuit was generating minute pulses and that all the coils have the right resistance, I disassembled it. Upon disassembly I find it has a fractured minute wheel. (At least it's called a minute wheel in the Citizen technical document for the movement; it's the wheel the minute hand is attached to.)

Can anybody suggest where I might source a replacement?

G

Core's C650 minute wheel 1.png

GPrideaux WRT Addict

GPrideaux

Posted
  • Author
Posted
9 hours ago, AndyGSi said:

Can you confirm what part no it is you're looking for?

Edit

Or highlight if any part matches from this photo.

 

I don't know where I can find part numbers. It's numbered 64 in the disassembly/assembly diagram. I've identified it in your image.

image.png.2adb95dcfd92759054d17f68753e0e0f.png

AndyGSi Distinguished Member

AndyGSi

Posted
Posted (edited)

I though it would be that part but it confused me that I couldn't see the pinion in your photo.

Edit

Where in the world are you?

Edited by AndyGSi
GPrideaux WRT Addict

GPrideaux

Posted
  • Author
Posted

Thanks, Andy. I'm in Western Australia. My photo was looking straight down the tube. Here's another photo on a 5c piece (roughly the same size as a US dime) that I took for scale and that shows the pinion.

IMG_4071.jpeg

GPrideaux WRT Addict

GPrideaux

Posted
  • Author
Posted

I appreciate your help. I'd be happy to pay for postage, if that would help, but if not, I'll appreciate any hints about where/how I might be able to source the part, or even a part number so I know what to look for.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • luiazazrambo
      WWW Eterna sucked me in.

      By luiazazrambo · Posted

      I put the original broken glass (whats left of it) behind the acrylic. This is how it originally looked like. A cheap clock but I like it. Very noisy when the alarm comes wake up guaranteed! 🙂
    • mbwatch
      Automatic vs Manual movement servicing

      By mbwatch · Posted

      If at all possible, find a service guide for the automatic movements your work on, because the lubrication procedures may have different requirements or rely on oils you would not use in a manual wind train (in addition to the braking grease you mentioned). Some autos like older Seikos do not have a manual wind option, so the procedure of letting down the mainspring without being able to use the crown may require a screwdriver in the ratchet wheel screw and great care. Do you have an auto movement you were planning to start with?
    • LittleWatchShop
      Breitling Navitimer 806

      By LittleWatchShop · Posted

      I am an amateur, so there's that. I do not get fixated on amplitude, lift angles, and beat error. However, 4.8ms would bug me if it were my watch. But you must judge your own skills to appreciate the possibility of going backward. I suggest, that you button it up let your friend enjoy the watch for now. As your skills progress, come back to it and correct it. I assume that this watch has a fixed hairspring pin. Some modern watches have an adjustable pin along with adjustable regulator. These are trivial to get in beat. I own a valjoux 726 my dad gave me on my 18th birthday (a looooong time ago). I broke the ratchet wheel with an aggressive wind 4 yrs ago. I have been waiting for my skills to progress before doing a service. I am close. Your advice is well placed and I will apply it.
    • tonydagee
      Unitas 6376

      By tonydagee · Posted

      I didn’t find any anomaly to the left of the red mark…reflection? this is the balance in its pivot in the inverted assembly. i can’t see any obvious kinks  and the spring is flat as far as I can see. Either the stud screw is missing, or it’s glued in… I don’t know. I’m loathe to fiddle with it. Any further insights? Thanks!
    • Bonefixer
      Breitling Navitimer 806

      By Bonefixer · Posted

      Update!  I've dismantled it, cleaned all the glue off, and rebuilt and lubricated the base movement. I'll leave the chrono part for another day. It's running well - great amplitude and keeping time, but it's got a beat error of 4.8ms.    How important is it to correct this? I'm worried that the potential for making things worse having to take the hairspring off and on repeatedly to adjust this. Would anyone here accept it at that?
×
×
  • Create New...