Jump to content

T691K crown EXTREMELY stiff

UziNimrod

By UziNimrod
in Fault Finding / Fault Diagnosis

 Share

Recommended Posts

UziNimrod New Member

UziNimrod

Posted
Posted

Hello,

I am a newbie. Just opened the back of a Tissot with T691K movement to address an issue of EXTREMELY stiff crown. Any advise is highly appreciated. 

I assume that there is high friction somewhere which caused the battery to go dead prematurely. Is it possible?

Tx for helping!

Link to comment
Share on other sites
Kalanag Super WRT Addict

Kalanag

Posted
Posted (edited)

Hello!

The keyless or motion works might have water damage. You have to get access to the dial side of the movement (ETA 988?) by removing the LCD. I would not recommend this task for e beginner in watchmaking.

IMG_5325.jpeg

Update:

The ETA 988 seems to have no keyless works. The hands are set electronically. So a stiff crown should be caused by friction (corrosion?) between stem and tube and has nothing to do with the movement most likely.

Edited by Kalanag
  • Like 1
Link to comment
Share on other sites
JohnR725 Distinguished Member

JohnR725

Posted
Posted

Ideally you want to remove the movement from the case because it would allow you to step bright the crown issue from the stem issue  and differentiate which one is the problem. Oftentimes crowns  with gaskets that go bad will grip their case tubes really tightly. Or as already mentioned  if rust gets into the movement that will create a  stem problem but if you take the case back off oftentimes  you can see the rust on the stamina at least grasp what your problem is..

Link to comment
Share on other sites

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


  • Similar Content

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • Neverenoughwatches
      Epilame / Fixodrop

      By Neverenoughwatches · Posted

      I read that same article last night  H.  I think epilame is too much headache for me, sources aren't always accurate, some conflicting. Such is the GRAVITY of this situation, Is it ok if i just STICK  to a thixotropic oil 🤣
    • VWatchie
      Epilame / Fixodrop

      By VWatchie · Posted

      Not sure I follow along. As I stated in one of my previous posts, the epilame will remain intact between rubbing parts as long as the surface is lubricated by oil or grease. Maybe it's just a coincidence, but note how the epilame-treated surface is illustrated in @Waggy's post. It looks like the oil is exposed to a binder (epilame!) so that it can't move sideways.
    • Neverenoughwatches
      Epilame / Fixodrop

      By Neverenoughwatches · Posted

      The epilame under the oil will also be removed  Unless the oil makes a barrier between the epilame and the escape teeth 😅 I think i need two strong coffees now 🤣
    • VWatchie
      Epilame / Fixodrop

      By VWatchie · Posted

      If we use the rub-off epilame method of pallet stones (run dry for a few minutes before applying the epilame) where will the oil go/be transported when it is pushed away from the impulse surface by the escape wheel teeth? Onto the epilame-treated sections of the pallet! Once the oil has been applied/transported to the epilame-treated sections of the pallet where will it then go? Nowhere as the oil will remain on the epilame. So, perhaps the run-dry method defeats its intended purpose leaving the pallet impulse surfaces dry!? If, on the other hand, we do not remove the epilame from the pallet stones where the escape wheel teeth come in contact with them I'd expect more oil to remain where we want it and need it. Yes, I agree, that is the question, and my gut feeling tells me that is exactly the case. Epilame was created to have an adhesive trait and the oleophobic property is just a side effect.  
    • Neverenoughwatches
      Epilame / Fixodrop

      By Neverenoughwatches · Posted

      Might that be the viscous nature of oil resisting gravity H  ,  we have been comparing water and hydrophobic surfaces which are similar in principle but water is much less viscous than oil. I guess what we trying to discover is if epilame also has an adhesive trait as well as being oleophobic. Plus the oil dropet has very little mass for gravity to work on, like watching tiny water beads that can grip onto vertical glass until they are connected together to increase their mass then run down. Gravity isn't the only factor at play when oil is placed on pallet stones. The oil receives a lot of bashing that may push it out of position ? Thinking about it if the oil stays in position for 10 minutes enough time for the escape wheel to scrape off the epilame , then  a walled in lubrication has been achieved,  the epilame is no longer beneath the oil ( possibly mixed into the oil )
×
×
  • Create New...