Jump to content

Help With The Winding/setting Mechanism Of A Hamilton 986A


Bill3

Recommended Posts

I have taken apart a Hamilton 986a, cleaned the parts, oiled, and reassembled the watch. Reassembled, that is everything except the winding/setting mechanism. The clutch lever fits in the grove in the clutch. I can wind the mainspring and even though the hands are not on, the cannon pinions seem to be moving. However, if the slightest pressure is exerted on the winding stem, it slips out. I cannot find a way to make the winding stem stay in.

Any and all help and advice will be appreciated. I have attached pictures.

post-844-0-05853900-1454724259_thumb.jpepost-844-0-92982400-1454724283_thumb.jpepost-844-0-01851600-1454724310_thumb.jpe

Link to comment
Share on other sites

It's hard to see from the pictures. What should happen is for the peg on the setting lever to be engaged in the groove in the stem, and then you tighten the setting lever screw.

Sometimes when the movement is out of the case, the stem can be pushed in too far and when you tighten the setting lever screw, the peg is still on the major diameter of the stem and so doesn't tighten properly. It's also possible the the peg on the setting lever is worn or broken. Can you remove the setting lever and show a picture of the other side?

S

  • Like 1
Link to comment
Share on other sites

^^ what Stuart said plus...

1. Could be the nub on the setting lever is worn. The setting lever will need to be replaced.

2. Could be the groove on the step has worn allowing the nub on the setting lever to slide out of the groove easily. The stem will need replacing.

3. Could be the hole in the movement plate is worn and the stem has too much side shake. Much harder to resolve. Possibly find a scrap movement or turn a new custom stem with a larger diameter to fit the hole snugly.

Often times it can be a combination of 1 & 2

Sent from my iPhone using Tapatalk

  • Like 2
Link to comment
Share on other sites

Stuartbaker and Mark, thank you for your input. I think you are right. The groove on the stem looks good with edges that are not worn. I am going to remove the setting lever and check the "nub". The setting lever is very difficult to install, but that is what must be done. I have a donor watch, so if necessary I will take the setting lever from that watch.

I am so close, yet so far from turning this into a working watch. When I get the stem in and wind the watch, THE WATCH RUNS. That is exciting for me because this is the first watch that I have torn down all the way and put back together. Somehow I am going to have to get around this winding problem.

  • Like 1
Link to comment
Share on other sites

Stuartbaker and Mark, thank you for your input. I think you are right. The groove on the stem looks good with edges that are not worn. I am going to remove the setting lever and check the "nub". The setting lever is very difficult to install, but that is what must be done. I have a donor watch, so if necessary I will take the setting lever from that watch.

I am so close, yet so far from turning this into a working watch. When I get the stem in and wind the watch, THE WATCH RUNS. That is exciting for me because this is the first watch that I have torn down all the way and put back together. Somehow I am going to have to get around this winding problem.

Good luck Bill :)

Sent from my iPhone using Tapatalk

Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • people be honest.... Swatch is evil for the watchmakers and repairers, BUT not everything in watches from Switzerland is from the Swatch-Group. As far as i know, Selitta got sacked by Swatch as a Movement-Assembler for them and they started to produce Movements in their own Name with slight Modifications. As far as i know, they sell Parts to the Market for their Movements. In most cases, if a ETA-Movement fails, it is a valid Option to replace it with a Selitta Movement, which i consider the Solution for this Mess with the Swatch-Group...... I have no Connection to anybody at Selitta, but being a Swiss-Guy, i still like to have Swiss-Made Watches, but not from the Swatch-Group.   ok ? regards, Ernst
    • Just one more greedy act by Swatch. They started a number of years ago here in the US..cutting off supplies to watchmakers that could build complications that many Swatch houses couldn't even touch. Old school masters who had gone through some of the most prestigious houses in the world. Otto Frei has some statements on their page about it. I tell all my customers to avoid new Swiss watches like the plague,..unless they just want an older one in their collection that still has some parts out on the market, or they have really deep pockets and don't mind waiting months and paying through the nose to get it back. Plenty of others to choose from..IE Seiko,..or other non-swiss brands Even a number of Chinese brands are catching up with the Swiss,..and I think that in time, their actions will be their downfall
    • Yes. If that's not what you are experiencing...start looking for something rubbing. A 1st guess is that one of the hands is rubbing against the hole in the center of the dial. Especially if you now have lower amplitude in face up/ face down positions.
    • Once a movement has the dial and hands put back and it is recased, would you expect the assembled watch to have the same amplitude as when the movement is in a movement holder and is without hands and dial? Thanks
    • C07641+ not sure what the "+" is for after the last digit.
×
×
  • Create New...