Jump to content

Installing balance complete on Seiko 7s26 automatic.

east3rn

By east3rn
in Watch Repairs Help & Advice

 Share

Recommended Posts

east3rn WRT Addict

east3rn

Posted
Posted

Hello dear watchmakers.

I am having a trouble with a Seiko 7s26 automatic movement.

I happened to remove the balance wheel and the hairspring from the balance cock but

I have no idea how to refit them back.

I am afraid I might bend the hairspring.

I am used to balance cock with screws that hold hairspring but I need help on this..

Any tip would be grateful!

 

 

KakaoTalk_20201109_181536848_01.jpg

KakaoTalk_20201109_181536848.jpg

watchweasol Distinguished Member

watchweasol

Posted
Posted

Hi  There are several videos by Mark our host on the subject and the technique involved during his overhaul/repair videos, my suggestion is to have a look and study his method.  There may be others By Jon who also adds videos and HSL another walk through contributer all excellent studs material.

east3rn WRT Addict

east3rn

Posted
  • Author
Posted
17 minutes ago, watchweasol said:

Hi  There are several videos by Mark our host on the subject and the technique involved during his overhaul/repair videos, my suggestion is to have a look and study his method.  There may be others By Jon who also adds videos and HSL another walk through contributer all excellent studs material.

Hello.

Thank your for your advice.

I searched the web for videos and couldn't find one working on Seikos.

Could you leave me a link of video that may help me??

Thank you:)

Marc Distinguished Member

Marc

Posted
Posted

First of all your first picture looks like the terminal curve is out of whack. That should be corrected before you refit the balance to the cock.

Then for the refit process take a look at the last couple of pages of the attached.7S26C_36C.pdf

jdm Distinguished Member

jdm

Posted
Posted
53 minutes ago, east3rn said:

I happened to remove the balance wheel and the hairspring from the balance cock but
I have no idea how to refit them back.

"How to refit (Seiko) Etachron" - often asked, you should use the search function. There is a section with pictures in the attached document.

7S26C_36C.pdf

  • Like 2
oldhippy Distinguished Member

oldhippy

Posted
Posted

east3rn,

This is not an easy task so be very careful. Instructions are always very helpful but when it comes to putting into practice some are not that easy.  

JohnC WRT Addict

JohnC

Posted
Posted

That PDF jdm posted guided me in this same question. After you replace it, make sure you don't slip and stab the hairspring while trying to regulate it. Ask me how I know!

 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Neverenoughwatches
      Diy rotary cleaning machine

      By Neverenoughwatches · Posted

      To add to this unusual cleaning idea, there is another type of device whereby the internal spinning parts that move through the fluid are not physically connected to the motor.  The internal whisk is propelled via a magnetic connection, so no damaged gaskets due to solvent contamination. 
    • Neverenoughwatches
      Tissot case back removal

      By Neverenoughwatches · Posted

      This is a method that Jon uses, and has posted a video of performing it somewhere .
    • Mercurial
      Etachron regulation system

      By Mercurial · Posted

      Did you watch the whole video? Once Alex has set the stud, he first corrects the best error, then checks that the hairspring coils are breathing concentrically, then turns the stud to centre the hairspring between the open regulator pins.  He then checks that the regulator can traverse the terminal curve without disturbing the hairspring. A correction is needed, which he performs.  He then reinstalls the balance and re-centres the hairspring between the regulator pins, and verifies that the regulator traverses the terminal curve without disturbing the hairspring.  Finally, he demonstrates how to close the gap between pins.  He then recaps the whole process, fleshing out more detail. If you follow this process, you have correctly set up the regulator pins, and are ready to set the rate of the watch.  If you are interested in learning more about the effects of the regulator pin spacing on positional rates etc, you can read any literature regarding regulator pins. The etachron system makes adjusting beat, centering the hairspring between the regulator pins and adjusting the gap between the pins very convenient, but the same rules that apply to old style regulator pins apply to the etachron system.  This video explains the basics :    I hope that helps, Mark
    • Klassiker
      Etachron regulation system

      By Klassiker · Posted

      Some photos of the angles you are talking about, and the changes you are seeing to coil spacing etc. would be really useful. Part of your problem could be that you are closing the pins too far and pinching the hairspring. Adjusting the pin separation should not affect amplitude. Nor should it change the coil separation.
    • VWatchie
      Rolex cal. 3135 issues

      By VWatchie · Posted

      Did you try it on a Rolex ref. 16600 specifically? Congrats on the nice condition of the movement in your watch. Even so, remember to check the rotor play or those marks around the main plate may start to build up.
×
×
  • Create New...