Jump to content

Omega 601 stem lock misplaces

Ascanio
 Share

Recommended Posts

Ascanio Member

Ascanio

Posted
Posted

Hi!

I need help on this annoying issue.

I purchased a 601 movement, it came with broken part 550-1110 which is part of the stem lock mechanism.

I ordered the replacement part from Cousins - it came in a different color/material as you can see in picture. I refitted it but when pulling the crown in 2nd position it raises up causing the stem not to be retained in position and pull out.

I thought the dial would force it to stay put in place, but no: I did fit and unfit the dial many times now. Pulling the crown in 2nd position causes this new part to raise up and I have to remove the dial to fix it.

Any suggestion? See attached two pictures, one (with arrow) showing the problem, the second just after placing the 550-1110 part in proper retention position.

Thank you!

Ascanio

.

IMG_4480.jpg

IMG_4481.jpg

Ascanio Member

Ascanio

Posted
  • Author
Posted
30 minutes ago, rodabod said:

Is it a genuine Omega part or an aftermarket part?

Uhm, I did purchase Cousins part number OME5501110G at £9 where G stands for generic... original part OME5501110 is priced £54.

So pretty much that is the reason... you think... yes?

Klassiker Distinguished Member

Klassiker

Posted
Posted

Is the post on the setting lever worn? Does the setting lever twist or tilt under load? Remove the setting lever spring and lie it on a flat surface. If it isn't flat, return it and get a replacement.

HSL Distinguished Member

HSL

Posted
Posted

Must say that generic spring doesn't look right, but it probably will do the part.
Since the setting lever spring already looks like it been almost worn out the rest of the parts must be in a good nick.
So I recomend to tear the whole keyless apart, clean it rigourosly and lubricate it again. Dont forgett to inspect and lubricate the stem too.
Otherwise the increased friction always will push that setting lever spring up due to its poor fitting. The lever nob on your still looks good but will wear down if you try the setting as it is now.
I add some action photos from an original Omega 601 so you see how the setting spring should interact.

Winding.

Omega_601_Winding.thumb.jpg.cb788b736633e946c6bb2ed90071ec2a.jpg

Setting.

Omega_601_Setting.thumb.jpg.81aee0dd251910452d9d114457ea96cc.jpg

 

PS. If you don't get it working I can send you some genuine keyless parts for free, just pop a PM.

  • Thanks 1
Ascanio Member

Ascanio

Posted
  • Author
Posted

As an update, I stripped down the keyless movement, cleaned and oiled, but the problem it is still present.

I found here locally in Italy a sealed original part 550-1110 at a very reasonable price (compared to the Cousins list price). I should receive the part in a few days and I will try fitting that... let's hope well. 

The generic part, seeing the original part pictured by the very convenient pictures of HSL, is way different and I hope it is responsible of the raising during position switch.

Thank You!

 

watchweasol Distinguished Member

watchweasol

Posted
Posted

Hi I think the genuine part will fix it   after market parts although look the same quite often are not. Consider the crispness of the edges of the pattern part are they sharp if not that is likely the problem sliding over the pin not along it.

  • Like 1
Ascanio Member

Ascanio

Posted
  • Author
Posted

Replacing the part with a genuine one fixed immediately any issue!!

I'm, so happy now. Thank you all for the suggestions!

Ascanio

  • Like 1
rodabod Distinguished Member

rodabod

Posted
Posted
15 hours ago, Ascanio said:

Replacing the part with a genuine one fixed immediately any issue!!

I'm, so happy now. Thank you all for the suggestions!

Ascanio

May be worth mentioning this to Cousins. I know they don’t generally offer refunds, but maybe they shouldn’t be selling this part if it is indeed incompatible. 

 Share
Go to topic listing

  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • tonydagee
      Calendar work certina 25-651

      By tonydagee · Posted

      Hello all, just disassembling to service, but I can’t figure out the working of the calendar work…it’s not operational the jumper and spring are ok, but the operation of the driving wheel has me at a loss. I can’t see a cam to drive anything. Is something damaged or missing? Help please!
    • tIB
      Unusual Seiko dial damage

      By tIB · Posted

      Believe the relume (not a fan) was done a long time after the damage. 
    • Malocchio
      Unusual Seiko dial damage

      By Malocchio · Posted

      I can only think of some chemical reaction to reluming
    • nickelsilver
      A lathe with indexing that won't break the bank?

      By nickelsilver · Posted

      I have a little milling attachment for my WW lathe, but very rarely use it and not for wheel and pinion cutting. For that I use a small Sixis 101 milling machine. I normally do direct dividing, but sometimes have to do an odd count and use the universal index which also fits on the Sixis.   Back in the day when I didn't have a mill, I would cut gearing on my Schaublin 102. It has a universal dividing attachment which fits the back of the spindle. Both it and the one for the Sixis are 60:1 ratio, and with the set of 4  index plates I can do almost any division. When I've had to do a strange high count prime number, I print a disc with the needed division and just place the plunger on the dot. Any position error is reduced by a factor of 60 so still plenty accurate.   The machines are a mess in the pics as I'm in the process of making a batch of barrels for a wristwatch 🙃.   This is the Sixis. The head can also be placed vertically, as can the dividing spindle.   Dividing plates. The smaller ones fit another dividing spindle.   Universal divider for the Sixis. I put it together with parts from an odd Sixis spindle that takes w20 collets, like the Schaublin 102, and a dividing attachment from a Schaublin mill.     The dividing attachment for the 102. The gear fits in place of the handwheel at the back of the headstock.   And the little milling attachment for the WW lathe. I just set it on the slide rest to illustrate the size, you can see from the dust on it it really doesn't get used much. I think only when I change bearing in the head, to kiss the collet head seat (grinding wheel still in the milling attachment).
    • SidKop
      Opinions on Seiko's 4R and 6R movement quality from those more able to judge

      By SidKop · Posted

      I read a lot about the quality (or lack thereof) of Seiko's 4R, 6R, 8L  movements...or more specifically the lack of regulation from the factory. Especially when compared to similar priced manufactures using SW200's or ETA's. I thought I'd ask those more in the know, do the 4R's and 6R's deserve their bad reputation, is it fairly easy for someone with minimal skills (or better yet a trained watch mechanic) to dial in these movements to a more acceptable performance.    For background I spent more on a 1861 Speedy years ago, expecting that the advertised 0-15s/d  would probably perform more like 5-7s/d. In reality it's been closed to 2-4s/d. 
×
×
  • Create New...