Jump to content

Bulova 11BLAC parts

TerryMcCabe
 Share

Recommended Posts

TerryMcCabe Member

TerryMcCabe

Posted
Posted

Hi

I have a Bulova 11BLAC automatic movement that I am working on. On dismantling it, I attempted to pry apart two gears attached to one of the bridges. The shaft connecting the two snapped off. The gear drives the second hand. See attached photo. I had to attempt this in order to lubricate it along with one of the jewels on the bridge. 

Is there any way of insuring this does not happen again as well as finding the parts. I have checked with Cousins but they do not have the part. I have found parts listing for the movement but doesn't provide any relevant information.

I am new to watch repairs and appreciate all the help that I have been given. 

Thanks, Terry

20180723_194032.jpg

Link to comment
Share on other sites
clockboy Distinguished Member

clockboy

Posted
Posted

The unwritten rule with watch repair is don't apply force to anything. I have not worked on this movement but I presume these wheels where on posts. The way to remove is by using the correct puller as below. Or a very straight pull.

56980650_ScreenShot2018-07-24at07_51_37.png.2af6573611608a6f0c6a9619e41f15df.png

  • Like 5
  • Thanks 1
Link to comment
Share on other sites
anilv Distinguished Member

anilv

Posted
Posted (edited)

On most watches you can just clean it in-situ and oil it from underneath the bridge if you can't slide your oiler under the wheel.

The problem is not removing the wheel, its getting it back in place as you will need to press it in from above but the pressure will mean that the wheel will pivot will also be pushing on the dial-side jewel and this is really not a good thing.

Anilv

Edited by anilv
  • Like 1
Link to comment
Share on other sites
dadistic Distinguished Member

dadistic

Posted
Posted

I did one similar recently, and used the presto tool that @clockboy shows to separate the wheels, and then set up my staking set to put them back together again. No problem. If you don't have the tools,  then take @anilv's advice, and do the best job you can without taking them apart.

 

  • Like 1
Link to comment
Share on other sites
StuartBaker104 Distinguished Member

StuartBaker104

Posted
Posted

I’ve heard these movements described as the alphabet soup movements as they came with seemingly endless combinations of suffix letters. In this case you appear to be talking about parts 5b and 91 per the following: https://www.cousinsuk.com/PDF/categories/2175_Bulova 11BLA etc.pdf. These come from the base calibre 11ALC. The part which has broken is 5b, which has the swiss equivalent 214 and Cousins has this in stock... but you will bees a fine punch to press the broken staff out of the intermediate wheel. Alternatively, you may find it easier to buy a used 11ALC OR BLAC from eBay. You will need the correct tool to seperate them or if you search the web you will find alternative methods but all with the risk of damage if the wheel isn’t pulled up straight

 

 

Link to comment
Share on other sites
TerryMcCabe Member

TerryMcCabe

Posted
  • Author
Posted

Thanks to everyone for your answers. Stuart, I found the 5b and 91 on the parts catalog for the Bulova 11BLAC but without the name of the wheel, I had no clue as to where to look. Where could I have found the description? Being new, I still have to learn the technical names for these watch parts. 

Link to comment
Share on other sites
StuartBaker104 Distinguished Member

StuartBaker104

Posted
Posted
21 hours ago, TerryMcCabe said:

Thanks to everyone for your answers. Stuart, I found the 5b and 91 on the parts catalog for the Bulova 11BLAC but without the name of the wheel, I had no clue as to where to look. Where could I have found the description? Being new, I still have to learn the technical names for these watch parts. 

As a new student, you should go to this web page, download all of the documents and print them out: https://www.cousinsuk.com/document/category/factory-symbols-trade-marks-ebauches-swiss-part-numbers

Once you have printed them, buy some paper index cards, copy each part number and part name onto one card per part and draw the corresponding part on the other side.

Before you go to bed every night for the next 9 months, get someone to test you on 15 to 20 parts or manufacturer symbols until you know them off by heart.

Alternatively, bookmark that page for future reference:-)

Sadly you should note that Bulova uses their own nomenclature so you have too Google their books. Mybulova.com is a good site for the older movements.

 

Link to comment
Share on other sites
  • 3 years later...
Bikerix New Member

Bikerix

Posted
Posted
On 7/25/2018 at 10:52 PM, StuartBaker104 said:

I’ve heard these movements described as the alphabet soup movements as they came with seemingly endless combinations of suffix letters. In this case you appear to be talking about parts 5b and 91 per the following: https://www.cousinsuk.com/PDF/categories/2175_Bulova 11BLA etc.pdf. These come from the base calibre 11ALC. The part which has broken is 5b, which has the swiss equivalent 214 and Cousins has this in stock... but you will bees a fine punch to press the broken staff out of the intermediate wheel. Alternatively, you may find it easier to buy a used 11ALC OR BLAC from eBay. You will need the correct tool to seperate them or if you search the web you will find alternative methods but all with the risk of damage if the wheel isn’t pulled up straight

 

 

Hi, I came across this post and wondered how you found the equivalent number in Swiss? I can't find any reference information on this. Specifically 334,337,51 screws from 11BLA base

Link to comment
Share on other sites
StuartBaker104 Distinguished Member

StuartBaker104

Posted
Posted

That was 3 years ago… I struggle to remember what I had for breakfast this morning!

I will probably have found a Bulova interchange catalogue on the internet somewhere. Cousins has pages here which show the Swiss part number along side their own, but it’s a bit slow going as the pages are indexed by the Swiss number

https://www.cousinsuk.com/document/category/bulova-movement-parts

 

Link to comment
Share on other sites
Bikerix New Member

Bikerix

Posted
Posted
14 hours ago, StuartBaker104 said:

That was 3 years ago… I struggle to remember what I had for breakfast this morning!

I will probably have found a Bulova interchange catalogue on the internet somewhere. Cousins has pages here which show the Swiss part number along side their own, but it’s a bit slow going as the pages are indexed by the Swiss number

https://www.cousinsuk.com/document/category/bulova-movement-parts

 

Ha Ha I know the feeling, It was just a hope. I use Cousins often but running thought the paperwork I can't find a Swiss part next to the part in question. Thank you for letting me know though.

Link to comment
Share on other sites
Bikerix New Member

Bikerix

Posted
Posted
13 hours ago, Nucejoe said:

 Have you checked with speedtimekolektion? 

There is a good chance they have the part, shiw them picture.

Ships free in europe.

I did have a look through them too but always worth giving it another try, Thank you.

Link to comment
Share on other sites
 Share
Go to topic listing


  • Recently Browsing

    • No registered users viewing this page.

  • Topics

  • Posts

    • watchweasol
      Chronograph Pusher Rod for EB8371-67 Snapped and Stuck in Button. Can't Unscrew.

      By watchweasol · Posted

      Hi. Yes I get it , the slot in the end I’d to allow you to screw the button on whilst holding the pusher shaft. To remove the pusher tube you will need a tool such as the one shown by Richard. I think Ali Express the Chinese Amazon has replicas of the Horotec system for a lot less money, how effective they are not having had to use one. But as you said the way to go is complete removal and replacement, bodging it up will  lead to a repeat failure
    • JohnR725
      Notifications

      By JohnR725 · Posted

      It does look like it seems to be working again I'm getting emails.
    • JohnR725
      30T2 adjustment of timing washers

      By JohnR725 · Posted

      One of the things that I've been bothered with lately is timekeeping? For instance a 90-year-old pocket watch what so to timekeeping was it supposed to keep? They publish railroad timekeeping but I don't know how well normal non-railroad watches were supposed to keep time. The reason why the question comes up for me is I spend a lot of time at work adjusting watches to keep really really good time  because I have to please my boss where as when the watch was made I have to wonder what kind timekeeping would've been acceptable. After all they typically didn't have timing machines 100 years ago and they were timing and six positions certainly not for the non-railroad grade watch. On the other hand I do get paid by the hour so maybe I shouldn't be concerned of how much time I Spend trying to make everything keep chronometer timekeeping almost. Citing a Delta of 40 seconds for a 90-year-old watch is quite outstanding.
    • JohnR725
      Is this pallet fork over-locking?

      By JohnR725 · Posted

      That's an interesting question which I don't think I've seen explained anywhere. But I think the problem will go away just about instantaneously. In other words the  coating is really thin and it should go away almost immediately. So the problem should resolve itself extremely fast.  
    • VWatchie
      Is this pallet fork over-locking?

      By VWatchie · Posted

      I experienced that different types of shellac and their ages are affected differently by IPA. Sometimes the shellac dissolves in a few seconds and sometimes several minutes are required. Nowadays I never let shellac come into contact with IPA. It's a hotly debated topic here on WRT if you search. Like John, I don't think you need to worry about the weight of the shellac, but instead that it might start rubbing against something. When I learned how to adjust pallet stones, I tried documenting my experiences in this thread. Hopefully, it can help you. I personally don't believe in the idea of abrading the epilame before oiling so I don't think you need to think or worry about it. The only time I've heard anyone mention this is Alex on the YouTube channel Watch Repair Tutorials but actually no one else. I'm not saying it's "wrong" just that I don't think it's necessary or adds anything.
×
×
  • Create New...