Simple project. Panerai Stem repair - what goes where?

[Hazing]

I sent a watch off for service and I get the sense it wasnt tested when it was all put back together. I received it and went to set the time and I couldn't. I could pull out the crown but I'm realizing now... It was just dead but held in by the crown guard. Shit happens. What can ya do but try to fix it?
I emailed the guy who did the work to see about getting it back to him but if I cns fix. On my Own, why not?

Originally I thought it might need an adjudtment/more room so I took off the crown guard and the crown just fell right out. With thr stem still in the movement. Also I had some extra parts.

This was out of box.

I managed to get the stem out and want to epoxy it back together or replace it but tha

A close up of the parts. Also if you look you can see a tiny ring around the stem. Near the middle. That it loose and comes off.

Here is a close up of that little ring that fell off.

I want to put this all back together, I just want to put back everything in the right place. Did that spring come out of between the stem and the crown? Can I just stick it back there? Can I epoxy it?

And that ring, I was going to just press it down to where it sits not snugly but I cNy imagine my watch should have loose parts bouncing around so I want to put this in the appropriate place as well.

Help is appreciated. And a few other pics.

The movement.

The crown and stem sorta put back together (with no pressure)

Where I think that spring goes. And the crown on top of that.

All the parts.

Any help and guidance is very much appreciated.

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[Hazing]

KJ2020 I need you, buddy. I should have just dmed you but who knows? . Maybe someone else will benefit.


erick510 you've probably seen this before. Thoughts?


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[mrsullivan]

Following, very interesting case despite it's bad luck for OP. I have a PAM with a loose crown, I can use the good words of the specialists here as well.

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[Hazing]

Following, very interesting case despite it's bad luck for OP. I have a PAM with a loose crown, I can use the good words of the specialists here as well.



Edit to add... Yeah good point. I have another model with a very wobbly crown thats been that way since I got it from its previous owner. I've been afraid to take the guard off of. Lol. Depending on how this goes, maybe I'll finally getting around to fixing it.

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Who was it? Tag them. We need all the help we can get. We'll I do.

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[tripdog]

It's the crown clutch mechanism which has come apart. Usually it's not possible to repair as some parts are pressure fit - namely that ring that you have sitting on the end of the stem.

In your second from last pic, just under 'All the parts', the parts go back together in that order - the spring inside the tube in the crown, (line up the hexagonal ring on the stem so it all slides down into the tube), then the ring is a pressure fit in the tube of the crown to hold everything in place (or the spring will push it all back out again).

 

[Hazing]

It's the crown clutch mechanism which has come apart. Usually it's not possible to repair as some parts are pressure fit - namely that ring that you have sitting on the end of the stem.

In your second from last pic, just under 'All the parts', the parts go back together in that order - the spring inside the tube in the crown, (line up the hexagonal ring on the stem so it all slides down into the tube), then the ring is a pressure fit in the tube of the crown to hold everything in place (or the spring will push it all back out again).

thank you.

I kind of tried to screw it or pivot it back into position but it didn’t work. I will try to hunt one down if I can. I found a replacement crown but not the stem and spring.

 

[Hazing]

tripdog the stem should have a little play, correct? Like once it’s tucked in the sleeve of the crown, it should slide in and out just slightly? Like the length of the spring? Is that correct? I never really noticed before.

can I adhere it so the stem is in a fixed position In that sleeve for the stem, and if so do I want it pushed in all the way to the crown or do I want it out as if the spring is pushing it out?


Like this?

Or like this?

Or do I need that play in there where it can shift to each position?

 

[tripdog]

tripdog the stem should have a little play, correct? Like once it’s tucked in the sleeve of the crown, it should slide in and out just slightly? Like the length of the spring? Is that correct? I never really noticed before.

can I adhere it so the stem is in a fixed position In that sleeve for the stem, and if so do I want it pushed in all the way to the crown or do I want it out as if the spring is pushing it out?


Like this?

Or like this?

Or do I need that play in there where it can shift to each position?

You need to have the play in it. The hexagonal section on the stem fits into a hexagonal section inside the crown tube, in its 'extended' position. When you push down on the crown the spring compresses, the hexagonal sections disengage and the tube can turn freely without engaging the stem - in the extended position the hexagonal sections are engaged and turning the crown turns the stem.

 

[Hazing]

Gotcha. Thanks thank you tripdog. The hunt is on For a permanent replacement. Any ideas where I can buy one? I can’t seem to find the step. I’ll check m2m in the mean time.

 

[tripdog]

You only need to find a screw down crown that'll fit you case tube, the stem can be unscrewed from the broken part from the crown - clamp the square section part of stem in a pin vice, clamp the tube & hexagonal 'nut' part that sits on the end of the threaded part of the stem in another pin vice and unscrew them.

 

[KJ2020]

You need to have the play in it. The hexagonal section on the stem fits into a hexagonal section inside the crown tube, in its 'extended' position. When you push down on the crown the spring compresses, the hexagonal sections disengage and the tube can turn freely without engaging the stem - in the extended position the hexagonal sections are engaged and turning the crown turns the stem.

Trip, what would be the reason for needing the crown to turn while the stem is not? I've only got one PAM. On mine the crown doesn't screw in, it winds straight away while flush to the case. I just assumed they were all that way so IDK why you would ever need the crown to turn while the stem is not turning, unless the crown screws into the tube but mine does not and I don't see any threads on his so could it be epoxied in the engaged position?

 

[tripdog]

Trip, what would be the reason for needing the crown to turn while the stem is not? I've only got one PAM. On mine the crown doesn't screw in, it winds straight away while flush to the case. I just assumed they were all that way so IDK why you would ever need the crown to turn while the stem is not turning, unless the crown screws into the tube but mine does not and I don't see any threads on his so could it be epoxied in the engaged position?

I don't really know why it would be constructed like that.

If the clutch is disengaged it allows you to turn the crown without turning the stem - winding the crown down onto the stem without it actioning anything in the keyless works for example. Maybe it's built like this to avoid the hands moving (even slightly) when you push the crown back down on the tube from the time set position - disengaging the clutch means there wouldn't be any movement at the stem.

 

[KJ2020]

I don't really know why it would be constructed like that.

If the clutch is disengaged it allows you to turn the crown without turning the stem - winding the crown down onto the stem without it actioning anything in the keyless works for example. Maybe it's built like this to avoid the hands moving (even slightly) when you push the crown back down on the tube from the time set position - disengaging the clutch means there wouldn't be any movement at the stem.

Interesting, thanks. I'd be real tempted to epoxy the hex nut to its hole and see if it works. Wouldn't need the spring or the ring. The threaded stem section might need to be shortened a tad if the crown didn't sit flush when the spring was relaxed.

 

[Hazing]

W

Interesting, thanks. I'd be real tempted to epoxy the hex nut to its hole and see if it works. Wouldn't need the spring or the ring. The threaded stem section might need to be shortened a tad if the crown didn't sit flush when the spring was relaxed.

well, that ring you would still need. Or it would be better. Last night I was playing with it and trying to sort of fit it back together and that ring acts like a sleeve to hold the stem from wobbling. Again, not that you need it but it just sort of adds another layer to add some stiffness to a very fragile or thin stem.

I couldn’t get it back together with compression or screwing it back so I did epoxy it last night and I let it dry overnight even though the epoxy cures90% within like an hour. This morning, I slipped the crown in and spun the crown and it separated. So I tried again. I epoxied it and let it dry and put it back in and it’s holding up. I’m being very gentle with it just in case. And I have some room for error because the crown doesn’t screw down. It just has pressure sealing with the Panerai crown guard. So I’m able to put the crown in all the positions. Down, winding, date/gmt.

at least I got it to work until I get a replacement stem.

thanks to everyone for their advice

 

[Oxfordgreen1]

What a great resource this site is.

I just followed this thread to do a stem rebuild on my 390. Issues with locking crown and then with setting time getting progressively worse.

Dissembled it all removed movement and then was stuck for a few nights as I couldn’t work out where the little ring on the stem was, turns out it was stuck in the case where the stem entered. I then rebuilt it all tonight and managed to luckily push fit it all back together now I’ve got a winding and setting 390 back working perfectly.

Having never worked on a 6497 before I was pleasantly surprised with how easy it was to work on. Much easier than 2824 keyless anyway..

Thanks to all above