2892 Remove mainspring power

[adiorio110]

 

To All

I purchase a  clone 2892-a2 ..I have seen Mark's video on servicing it also his one servicing the omega with same movement . When I try to remove power from mainspring  by pushing the click spring out of the way I feel the stem  unwind a little also see the ratchet wheel move a little but the barrel does not and there is still plenty of power left ...What can I possibly be missing?  In The meantime I am just waiting for it to power down ..But I would like to know for future reference.I probably should assume something is amiss.  

Thank You

Anthony 

PS ...This movement looks like it is going to be much more challenging  than anything I have tried so far. Any tips appreciated 

Edited February 6, 2019 by adiorio110

[JohnR725]

Are you trying to let the power off  with the automatic assembly still in place?

[adiorio110]

16 minutes ago, JohnR725 said:

Are you trying to let the power off  with the automatic assembly still in place?

No Sir

 

Took it apart  as per 

 

Edited February 6, 2019 by adiorio110

[adiorio110]

[JohnR725]

So my apology when I looked at the tech sheet I knew the automatic came off that standard but I thought it had a standard click mechanism not quite. Mark actually has several videos I found another one at about eight minutes 40 seconds he shows releasing the click. Then just to make sure from your image I circled where the click should be. Then image from the tech sheet to see the layout of the gears etc. part number 425 is the click.. So as a guess if they gear train is glued together with gummy old oil and that would include the stem winding parts it's not going to release. You may be able to back wind from the crown  if the parts will move at all.

Then worst-case  not my favorite remove the pallet fork. Make sure  the dial side components are off when the train spins down  you don't want to have anything to come to a sudden stop that would be very bad.

https://www.youtube.com/watch?v=L5M4WFJ359c

[vinn3]

if you remove the balance and fork it should let the spring down and this allows you to "run the gear train for inspection.  vin

[adiorio110]

JohnR725  

Its a brand new clone movement so it should not be all gummed up. I Looked at the video you attached it shows mark was helping the barrel along by unwinding it.  I was expecting to be holding it back from spinning to fast. If it still has any power tomorrow when I make another attempt I will try that. 

Anthony

[adiorio110]

5 hours ago, vinn3 said:

if you remove the balance and fork it should let the spring down and this allows you to "run the gear train for inspection.  vin

Vin

 

Thanks JohnR suggested the same thing..As I am new to this movement I think I am going to just wait till it powers down ...I don't want parts to go flying all over the place. 

Edited February 7, 2019 by adiorio110

[vinn3]

11 hours ago, adiorio110 said:

Vin

 

Thanks JohnR suggested the same thing..As I am new to this movement I think I am going to just wait till it powers down ...I don't want parts to go flying all over the place. 

   check it out,  that is a way to let down the main spring.  ask Mark.    good luck.  vin

[adiorio110]

I took a shot And it worked find ...Thanks

 

Took the whole movement apart and rebuild was pretty easy ...Think I should try a 7750? or is there something  a little more complicated I should try first

Edited February 8, 2019 by adiorio110