Jump to content

Seiko 4402-8000 Second Hand Stopping, Not Touching Crystal...

JBerry
 Share

Recommended Posts

JBerry WRT Addict

JBerry

Posted
Posted (edited)

I recently serviced this Seiko 4402-8000 King Seiko with a 4402A manual winding movement.

I've serviced this grade a couple of times before and it's went OK. Before servicing the watch was gunked up and a non-runner. Since servicing the watch is stopping maybe once or twice a day with the second hand between about the 28 and 32 second mark. Giving it an extra bit of torque by winding will start it off again.

I initially thought it was the second hand touching watch crystal, but I've ruled this out by placing some tape inside the crystal to simulate it being lower, and there is still lots of clearance with the second hand.

Thinking maybe it was gunk somewhere on the fourth wheel teeth stopping the second hand, I cleaned and inspected the wheel which seems fine.

Independent of the position of the second hand relative to the minute hand it will stop around the same point, so I'm assuming it's not something to do with the minute wheel...

Any ideas much appreciated! this has me well puzzled.

photo_2022-12-21_17-20-44 (2).jpg

photo_2022-12-21_17-20-44 (3).jpg

photo_2022-12-21_17-20-44.jpg

Edited by JBerry
Nucejoe Distinguished Member

Nucejoe

Posted
Posted

I remove the sweep hand , as its tube can be rubbing.

The sweep arbour itself  ( if bent )  might rub.

Sweep arbour's lower pivot or its relevent jewel and arbours end shake should be checked anyway.

Rgds

 

  • Thanks 1

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

    • tcabot
      Looking to try servicing an old movement

      By tcabot · Posted

      Thank you. No value to me, and I guess not much value to anyone else either - just practice fodder as far as I see them. Ingersoll might make a nice watch to wear if I manage to service it. Benrus, I suspect, is too far gone in terms of case and dial - no cheap ways of getting them to decent looking condition? I wonder how these old movements compare to modern Chinese ones? Probably not favourably, even if there's nothing broken in them? Progress moves on? I've got an old Slava that I'm quite attached to, so I won't be learning on that one.
    • AndyGSi
      Looking to try servicing an old movement

      By AndyGSi · Posted

      Welcome to the forum. You're best starting with something that you know runs well and keeps good time. That way when you've stripped and service it, any problems are due to something you've done.
    • Kalanag
      Looking to try servicing an old movement

      By Kalanag · Posted

      Welcome to the WRT-Forum! Sorry to say it, but you’re very likely to break or lose something when servicing a wristwatch for the first time — I’ve been there! So, if these watches have any value to you, don’t attempt to service them as a beginner.
    • dnhb
      Loose roller table

      By dnhb · Posted

      In writing "shimming the staff" I was alluding to the idea trailed in the above referenced thread of inserting a hair along the staff which, as the discussion there covered,  could result in some eccentricity. By making a (more or less) complete cylinder I was hoping to avoid that problem. Don't tell anyone, but needing a very ductile metal to do this by manipulation at such a small scale, I used a piece of an empty Tomato pureé tube! It occurred to me that the material's ductility(?) would also put less stress on the RT in forming a sufficiently tight seal. Anyway, that's how I avoided the temptation to use glue. No doubt your punctuational response to this confession will be "!!!" !
    • tcabot
      Looking to try servicing an old movement

      By tcabot · Posted

      Hi All. I would appreciate some advice for a complete newbie on getting into watch servicing - nothing serious,  just as a fun project. I've got a thing for hand-wound watches and would like to bring an old watch (or two) back to life, so looking to learn to do a strip-clean-oil-assemble cycle.   I've toyed with this idea in the past (years ago) and picked up a couple candidates to learn on, but never found the time for them.  One is an old Ingersoll, swiss-made 17 jewels. It seems to wind and tick. Casing, dial, glass are in great shape, so looks like a good candidate to me for the first service. The other is a Benrus DR23. It winds and makes a few reluctant ticks, but then seems to stop. Casing looks like a complete gonner, and the dial is in pretty poor shape too. If the movement is not broken and just needs a service, I wonder if there's any possibility of getting a cheapo Chinese casing & dial to fit this movement in, or is it extremely unlikely to be the right size?   For a start, I want to strip & assemble a movement, perhaps a dozen times to build up the basic parts handling skills. I see that online advice is to buy a Chinese-made ST36 for this purpose. Can I just go at the Benrus or Ingersoll instead, or does it make more sense to get a cheap ST for this? Thank you.    
×
×
  • Create New...