Jump to content

longines l890.1 date indicator driving wheel

peter64

By peter64
in Introduce Yourself Here

 Share

Recommended Posts

peter64 New Member

peter64

Posted
Posted

Hi all,

This is my second posting since joining the forum about 2 weeks ago. My query this time is as per title. I recently purchased A Longines  automatic watch which had the L890.1 movement, the watch was running fine when I got albeit the hour and minute hands were not advancing. I immeadiately thought the problem would have something to do with the cannon pinion but upon opening the watch and removing the dial I noticed a number of stripped teeth from the hour wheel. Further investigation revealed a pair of small spring wires protruding from the date indicator driving wheel the purpose of these I can only assume is to give a rapid date changeover. I Googled this problem and found a uTube video showing the date change in operation and low and behold in the video there was no sign of these spring wires so it would appear the watch would still function with these wires omitted .I have since removed these wires but unfortunately can't test it as I am waiting on a new hour wheel. A nice movement but I believe this was a design flaw. By the way I forgot to mention that on side of the wire springs was awkwardly bent thus stopping the wheel from turning which in turn led to the stripping of the teeth from the hour wheel. Anyone else come across this problems?

Peter  

  • 9 months later...
Gherghinescu New Member

Gherghinescu

Posted
Posted

Hello Peter! I openend one today and a donor movement too. Both have the spring inside the date change wheel broken and one of them has the hour wheel missing a few theeth. I also noticed deep wear marks on the small golden barrel teeth on both examples, even tho one of the movements is looking otherwise unused.. I will try to dismantle one of the date changing wheels (non-destructively hopefully) and atempt to replicate the spring.

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

    • Mark
      Ad Free WRT

      By Mark · Posted

      Of course it will continue Richard.
    • Rixy
      Help with Hermle ships clock

      By Rixy · Posted

      I have stripped and cleaned a Hermle ships clock. It was just oily, no major faults, and I reassembled it, following my photos in reverse order. The time train is fine but the strike train will not play the ships bell strike for half-past. Ships bells play a four hour sequence for the 'watches' and play double 'ding' for the hour and the double dings plus one for the half past (eg half past the second hour is 'ding-ding' 'ding-ding' 'ding'). Sounds complicated but it isn't really. The strike wheel consists of pairs of bumps (for the ding-ding) and no single bumps. There must me some mechanism on the half-past that lifts the strike lever over one of the bumps so only one ding is played. When I get to a half past, it still plays double ding. I have a feeling it is to do with the lever in front of the rack (there is a sprung attachment  on it) and the position of the wheel (to the right) with the two pins that lets that lever fall, but no matter where I place that wheel I cannot get a single ding at half past! Please can someone help with advice on positioning so I can fix this? BTW Happy Easter 🐣 
    • mbwatch
      Who's doing what in the world of watches today.

      By mbwatch · Posted

      No it's not 52. I had looked at the Pocket Watch lift angles thread, which lists Elgin 6s as something really high like 62° but visually that is not at all what this watch is doing. I think 42° is more correct and that's where my machine is setup. The watch has a million problems but I have made solid progress. Impulse jewel replaced. Hairspring didn't match the balance (which also doesn't match the serial) but I got it down into range this weekend with 8 or 10 huge timing washers. Replaced the mainspring, balance and train are nice and free. At this point it is running consistently and in beat at about 160°, the third wheel has a bend that sends the timegrapher on a little roller coaster every 8 minutes or so. Remaining amplitude problems may be down to the escapement. The banking pins were way out and it didn't run at all before I started. It has one of the old brass escape wheels rather than steel, and I assume the faces its teeth are probably worn or scored in a way I can't yet fix (or see without a microscope). I know this watch is not going to run above 250° but I am going to keep trying to get above 200. But the best part about this watch? Some unscrupulous person stamped "21 JEWELS" on the train bridge sometime in the past, right on top of the Damascening. It's a 15 jewel movement.
    • tomh207
      Smiths rim wind and set

      By tomh207 · Posted

      I think it would rather be the blast of high current drain that would do the damage. But if used occasionally to maybe fix a mainspring or do dial feet it might be worth trying especially if the mainspring or a replacement couldn’t be found.    Tom
    • RichardHarris123
      Ad Free WRT

      By RichardHarris123 · Posted

      This is indeed a unique site and members including myself genuinely care about it.  All we want is the site to continue. 
×
×
  • Create New...