ETA 251252 wheel top plate reassembly

[gkmaia]

I am struggling with this one. Trying to put the wheels and the top plate on top of them but spent hours and could not align the pins to the jewels... soooo hard.

Can you guys give me some tips on how to do it? 

[clockboy]

Practice practice practice. We have all been there, make sure all of the wheels are straight and aligned then the plate should just fit on with very little wriggling required. 

[canthus]

Usually it is the rotor (parts 4211 in diag) which will not sit upright/square in its hole.  Put a small piece of steel (one that is attracted to the rotor) on the underside of the mainplate under the rotor position.  This should attract the rotor to keep it upright in its hole.  Other than, that clockboy is right, practice and loads of patience.  Use an eyeglass/good magnification to look at the pivot holes, you should see the end of the pivot, and so see which ones are not seated yet.  Have a break if you are getting frustrated, else you may cause damage. 

[watchweasol]

Hi Other than what has already been mentioned,  there is no magic bullet. Concentration and practise are the key words, and as Canthus said  walk away when the tension mounts,  have a beer and relax as getting wound up will lead to further problems,  just be patient we have all had our share of frustation.  All the best.

[gkmaia]

Thanks for the tips! I managed the put it back together quite a few times already. Think I am getting more used to it. Sometimes I think I have parkinson cause I shake like hell!

I got a 200x digital microscope and I am 100% sure all the pins are inside the jewels.... but

had to disassembly quite a few times because the 210, 204, 224 and 203 are really stiff.

When winding with the crown the wheel 242 inner gear is slipping from it's shaft and sometimes skipping teeth. 

I can move wheel 242 manually but it is really stiff.

I did try removing all wheels and then putting together:

210 and 204 and it winded fine

then 210, 204 and 224 and winded fine

so went ahead and put it all wheels back and still stiff. it does not fell like it is just grinding... feels like when you fasten something really tight. 

did check wheels are no bent, pin and jewels and fine and clean, lubed...

Edited October 25, 2020 by gkmaia

[gkmaia]

I am getting good at it!!! did it quite a few times trying to find what is causing the stiffness.

So I found it... it is the magnetic wheel marked bellow.

But... if I try to rotate the magnetic wheel with a stick directly it rotates just fine and rotates the entire mechanism just fine as well. So it is not stuck. 

I've tried the other magnectic wheels and got the same result and none of the wheels are bent or have broken teeth.

[gkmaia]

I finally understood what happened here. Complete ignorance. 

The canon pinion and driver are meant to slip so when the hour and minutes get adjusted the seconds are not affected. 

The watch is working fine now.

[Nucejoe]

2 hours ago, gkmaia said:

I finally understood what happened here. Complete ignorance. 

The canon pinion and driver are meant to slip so when the hour and minutes get adjusted the seconds are not affected. 

The watch is working fine now.

So does that mean you now buy more watch grease and less super glue?