Jump to content

Longines 6942 balance cleaning.


HSL

Recommended Posts

The Longines 6942 is quite straight forward to service but since it is equipped with the KIF-ultraflex shock absorber some might decide to just clean the whole balance in one-dip, oil it through the
jewel hole and leave it with that.
So here is a small walk through of how one might do to dismantle parts of the escapement to get this sorted out in a different way.

IMG_20190202_141225.jpg

Link to comment
Share on other sites

When you look at the shock absorber through a Lupe you can se it has a wide and a narrow slot on the brass ring. On mine the narrower slot is positioned to the left.
With an oiler I push the spring on the narrow end downwards. the spring should pop up a bit so lift it up to the position you see in the picture.

IMG_20190202_142039.jpg

Link to comment
Share on other sites

Flip the movement, make sure no power is in the mainspring by lifting the click spring. Push the winding stem back in into the 
winding position. Gently wind an see if the train moves free. Make sure you clean the pallet fork jewel holes with a peg wood.

IMG_20190202_150903.jpg

Link to comment
Share on other sites

Put back the pallet fork, apply some tension on the main spring and check the action on the escape with the peg wood. Move the pallet fork back and forth. Leave the pallet fork in the upper position.

IMG_20190202_151215.jpg

Link to comment
Share on other sites

16 minutes ago, rogart63 said:

What use does the +- have on the beat error arm? 

Guess they just symbolize the direction to go when adjusting the beat error. It isn't like on the regulator where you make the spring length shorter or longer and by that increase or decrease the oscillation frequency. Should have been R & L since you center the impulse pin in relation to the pallet fork with it, 

Edited by HSL
  • Like 1
Link to comment
Share on other sites

1 hour ago, HSL said:

It isn't like on the regulator where you make the spring length shorter or longer and by that increase or decrease the oscillation frequency.

Somehow statements like that comes back to bite you in the ass.
Even though this contraption is on the beat error arm it can be used to regulate the rate, python port regulator, hence the + and - .
It has a smal brass disk attached to the center of the small setting screw, it moves back and forth. Due to the friction between the brass disk and the regulator arm it moves it in micro steps. 
For some reason one always seen them but never given em a closer thought.
Here is a pic of a spare I had. Notice the easy studless hairspring attachment.
 

IMG_20190202_184817.jpg

  • Like 1
Link to comment
Share on other sites

3 hours ago, HSL said:

Somehow statements like that comes back to bite you in the ass.
Even though this contraption is on the beat error arm it can be used to regulate the rate, python port regulator, hence the + and - .
It has a smal brass disk attached to the center of the small setting screw, it moves back and forth. Due to the friction between the brass disk and the regulator arm it moves it in micro steps. 
For some reason one always seen them but never given em a closer thought.
Here is a pic of a spare I had. Notice the easy studless hairspring attachment.
 

IMG_20190202_184817.jpg

i didn't see the screw. I thought it was a screw from the top. But it's a nice idea to be able to adjust the length of the spring. 

Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • Dell fancy a challenge🤣   https://www.ebay.co.uk/itm/285785684626?itmmeta=01HT29WVJY21Q94C73GYHGBTFX&hash=item428a277a92:g:15YAAOSwNRVmBAUz&itmprp=enc%3AAQAJAAAA0DIe4QLQBW66rSyIMiyBuk8GY%2B86pQ%2BQnxGbcNq7egAGe5DIs9YMmiWJIbZtMSxwNJIiJxuojbq523IeUSBQ6pJEIQ0tfz2ChrBR03BksmKINyklg1IK4GAfAcYY9Hta9wVeSZSZN7ZCNAfZTgKs9c4%2BUIUZ3Qjc3QjUXDn2uPRo1FiYOEewMG5A26EXb%2BclBgrqtbOmM6P3bea%2F8ZImOAXNI1HtbmtMk84pIGoM6ISwaM1PKFuADtTFMccS5e3ZjndCbXYXHrW3CecsV0edw3M%3D|tkp%3ABk9SR8q588nQYw Darwin’s theory of evolution has not been proven to be absolutely.  😀 
    • A already know the size movement I have the problem is the dial a had purchased has a dimension 20.6mm wide a want to find a watch case that going to fit the dial perfectly 
    • Hi.  I would like to take issue here regarding battery driven , watches, clocks,etc. I will and do repair these clocks in fact I have sever al in my collection as well as the regular mechanical ones. I have one on my mantle piece over 60 years old tha belonged to my wife’s Aunt,  long gone Iam afraid and it has been cleaned etc and never missed a beat and is accurate. Every one has their preduices as regards Electrical /electronic Horology but I regard it as part of the progress time line of the art of Horology and to be treated as such. Like Darwin’s theory of evolution it evolved.  Two cavemen knocking rocks together and a shard broke off , looking at it he worked out if it was stuck on the end of a stick he would have a spear. Likewise his pal seeing what he was up to picked up a piece  and did the same, now that’s evolution. Some clockmaker decided to build a clock that ran with a battery and no spring to wind up and break, progress and both the mechanical and battery driven clocks evolved, the battery ones got better to the point that if it broke you changed the complete unit. Likewise watches did the same but both can be repaired by people who approach Horology with an open mind without preduice.  We all have our likes and dislikes bu I for one would never dismiss any technology because I don’t like it.   The mobile phone is a good example of modern technology at work as is the automotive industry. There buttons and switches in my car I don’t use because to me they are not nesessary but I still drive the car.
    • I haven't gone through all the reading of what it might be or not. The first thing I would do if nothing obvious stands out is replace the mainspring, you have to start at the source of the power. Nine times out of ten that is the problem.  
    • Haha. You're just in a wicked mood today John 😅
×
×
  • Create New...