Jump to content

Bulova 6CF Movement


Folkvisor

Recommended Posts

Well hard to say but if we would start some were you could start like this..
1. Release all tension from the mainspring( move the click from the teeth)

2. Take away the balance.
3. Take away the pallet fork.
4. Wind up the movement slightly (slow)

If the escapement wheel turns smoothly the fault is in the area we removed. If not we know it is either in the dive train or the motion works.

If the escapement wheel turns then start with putting back the pallet fork. Use a toothpick to manipulate the pallet fork and see if you get some action on the escapement wheel. Sometimes it has a wee bit to much oil and don't get that snappy action.

If it moves you for sure have your problem in the balance or hairspring.
 

After ticking of these boxes I'm sure we could find what is wrong with the little beauty..

Link to comment
Share on other sites

Try to clean of the pallet fork crystal and pallet cock  crystal with rodico, sounds like you got a little dirt or excess oil either there or in the balance crystals. sometimes when one cleaned the balance crystals one might have switched the upper and lower one. 
Before putting the balance in put the pallet cock in the upper position..

Link to comment
Share on other sites

Frustrating...do the gears spin when you wind it with the pallet and balance removed?.I apologize for asking if you have already answered.is the hair spring oily or sticking to itself?

Edited by yankeedog
Content
Link to comment
Share on other sites

It is working albeit slowly. I have yet to replace the end jewel in the top of the balance bridge but that shouldn't be the reason it works slowly. I'll oil it - again. But I hesitate to do that because it has already been oiled.

All the wheels have end-shake and the pallet fork moves more quickly now when I nudge it with a toothpick. The pivots on it aren't bent. No pivots look bent and all the jewels are good. I'm still not working properly.

I'm happy it is working but it can still be improved. I still need to oil the pallet stones so that may speed it up a little.

 

Link to comment
Share on other sites

Did you peg the jewel holes for the pallet arbor? They have to be truly spotless. It doesn't take much at all to suck all the power. With the watch unwound and balance out you should be able to tilt your movement holder and give it a little rap on the bench top one way and another and get the pallet to move around between its bankings. If it isn't absolutely totally free you'll never get any further. If you determine it's fine then you can proceed to the balance wheel (wait- stick the fork horns in clean pithwood a few times). Power down fork out, install the balance and a little twist of the movement holder should set it in motion for quite a few seconds. If not, start looking at why (hairspring distorted or rubbing, muck in the jewel holes). I've seen an almost invisible strand of dust that was clamped under an adjoining bridge that just came in contact with the balance that caused a lot of frustration.

Link to comment
Share on other sites

Thank you for all your suggestions; they were extremely helpful. I especially like your suggestion re pithwood. I used it to reclean the pallet jewel ends.

I checked the pallet arbour jewel holes and I cleaned the pallet jewels; their ends were dirty. The balance spring was fine. 

I have the movement working now but I still have to put back the balance cock end jewel. 

The amplitude wasn’t good until I oiled the pallet stones. It has improved greatly.

When I get the oiled endstone back in I’ll put it on my time grapher and see what kind of reading it gives me.

These are really quite amazing little machines. You'd never expect a car to run 24/7/52 year after year!

Edited by Folkvisor
Link to comment
Share on other sites



  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • in general this shouldn't be any change. but in general questions like this it be nice to know the specifics of the watch in other words how was it performing before it was cased up and what is it doing now.
    • just as a reminder this watch is a Swatch group product. This will bring up a problem like spare parts and technical information. that I found some links to some information on when I talk about your watch and some of the technical and basically your watch is equivalent to 2834-2 for which I'm attaching the technical sheets. But equivalent does not mean exactly the same you want to do a search on the group for C07 as we discussed this watch before including the technical differences how it's supposed to be regulated and basically because it's watch group there is no parts availability. https://calibercorner.com/eta-caliber-c07-xxx/   https://www.chrono24.com/magazine/eta-movements-from-the-2824-2-to-the-powermatic-80-p_80840/ https://www.watchuseek.com/threads/h-10-movement-details.4636991/ eta CT_2834-2_FDE_481857_15.pdf
    • 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.
×
×
  • Create New...