Jump to content
When you buy through links on our site, we may earn an affiliate commission.
  • Current Donation Goals

Help putting back balance stud and regulators


GenTLe

Recommended Posts

Alex, this is a test movement: partially assembled, got for free from a member of the other RWG. I needed to unassemble the stud and regulator to take out the Inca spring that I need for another (good) 7750 that has a broken lyra spring.

No, couldn't just swap balance assembly as the co_k is different and doesn't fit in my other base plate.

Now, before going to work on the good one, I want to learn on this test one.

Cheers, GenTLe (Alex too, that's my real name)

Edited by GenTLe
Link to comment
Share on other sites

I think the first think you need to do is get the balance wheel with attached hairspring out of the way. You don't want to damage that any further ;)

 

Put a piece of rodico under that fine regulator arm to hold it in place while you remove and turn over the balance c ock.

Then you need to unscrew the stud retaining screw that holds the hairspring stud in the balance c ock. That's the screw at the 7 o'clock position in your photo.

only turn that screw half a turn at a time, until the stud is released. You do not want that falling out!

 

Where the terminal coil of the hairspring passes through the regulating pins, the 2 brass pins at the 8 o'clock position there is usually what's called a 'boot' that sits across the 2 pin to prevent the hairspring from jumping out of the pins.

This 'boot' will rotate. They sometimes have a tiny slot in the top to get a screwdriver in, they sometimes have a hole in the side to insert a tiny needle etc. or grip it with a pair of tweezers and turn it a quarter turn and lift out the hairspring.

Remember to do the stud retaining screw up as soon as you have the stud out. 

 

I can't help you with the refitting the regulator arm as I haven't done one yet.

But get the balance and hairspring clear first ;)

 

Good luck.

  • Like 1
Link to comment
Share on other sites

This thing is a bi_t_ch!!!! I managed to take out of the way the balance and its spring, putting back the hair spring stud holder on the co_k is easy, but the coarse and fine regulator rings are BAD to put back around the jewel holder...

REALLY bad, they are!

Link to comment
Share on other sites

I think the first think you need to do is get the balance wheel with attached hairspring out of the way. You don't want to damage that any further ;)

 

Put a piece of rodico under that fine regulator arm to hold it in place while you remove and turn over the balance c ock.

Then you need to unscrew the stud retaining screw that holds the hairspring stud in the balance c ock. That's the screw at the 7 o'clock position in your photo.

only turn that screw half a turn at a time, until the stud is released. You do not want that falling out!

 

Where the terminal coil of the hairspring passes through the regulating pins, the 2 brass pins at the 8 o'clock position there is usually what's called a 'boot' that sits across the 2 pin to prevent the hairspring from jumping out of the pins.

This 'boot' will rotate. They sometimes have a tiny slot in the top to get a screwdriver in, they sometimes have a hole in the side to insert a tiny needle etc. or grip it with a pair of tweezers and turn it a quarter turn and lift out the hairspring.

Remember to do the stud retaining screw up as soon as you have the stud out.

 

I can't help you with the refitting the regulator arm as I haven't done one yet.

But get the balance and hairspring clear first ;)

 

Good luck.

 

give this man an award !

  • Like 1
Link to comment
Share on other sites

  • 2 weeks later...

You broke my movement already, lol.

Good luck with this i did one on a 6497 and its a pain to do

Lol, the balance co_k was not fitting on my plate, so I had to do that in order to take out the spring (main reason I was searching it) without breaking it ;)
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...
Please Sign In or Sign Up