Warning regarding A7750 Keyless works!

[guanaco]

I just messed up mine on my Santos Chrono.... make sure the crown/stem is in the winding or quickset position position before removing. I can put the stem/crown back IN, however it won't do anything, well, I can wind the watch but I can't do anything else like setting the time and date; Plus, the escapement mechanism/balance-wheel is not moving. Now I have to wait until my hand remover arrives so I can remove the dial and fix it. :x

This has really been a $%#& day. Oh well, time to strap on the speedy. :|

I read this from someone on TRF, here's how he fixed it: [click:710eeu45]http://www.minus4plus6.com/7750-2824.htm[/click:710eeu45]

 

[Drulee]

Did the same thing with my PAM 089 GMT. Was about to take it to a local watch smith, when I remembered a thread I had read on here. The thread mentioned putting some Moebius watch oil on the stem (see ETA charts for locations), then moving the stem in and out of the movement, then press the stem release lightly a few times and repeat. After doing this I pushed the stem/crown back in while pressing the release button down, and CLICK, it went back in. After doing this I made sure to always remove the stem from the winding position as per Ziggy's thread advice.

 

[d4m.test]

Im sorry to hear about this...
PM me if you want the eta tutorial for dis assembly/assembly.
Sounds like you displaced the stop lever/hack lever.
If you can get the stem back out and have the movement out of the case, I have occasionally been able to reach in to the stem hole with a very thin needle that I have for just this occasion and relocated the stop lever (basically you pull the little lever back toward you). It has saved me from taking a watch apart a couple of times. Because once the stop lever needs to be put back in place its a rather lengthy job.
CBR

 

[guanaco]

Thanks guys!

@Drulee I'll order some of that oil as soon as possible.

@CBR: Where would I find the stop lever? I Have the movement out of the case now.

 

[Drulee]

Im sorry to hear about this...
PM me if you want the eta tutorial for dis assembly/assembly.
Sounds like you displaced the stop lever/hack lever.
If you can get the stem back out and have the movement out of the case, I have occasionally been able to reach in to the stem hole with a very thin needle that I have for just this occasion and relocated the stop lever (basically you pull the little lever back toward you). It has saved me from taking a watch apart a couple of times. Because once the stop lever needs to be put back in place its a rather lengthy job.
CBR

I have another DSN A7750 (non GMT) that I bought from someone on another forum. I just got around to using it last week, but haven't been able to insert a stem (it came without one), so I think it may have the same problem. I'm going to try the oil trick I used with the other GMT one, but if that doesn't work I'd like to know a bit more about your technique. Right now I can insert a 1,2 stem, but it stops at the day setting position (ie can turn it and it will change the date).

I'm in the process of taking some pics of the release button, to post on another thread, I'll post one here too.

 

[Drulee]

Thanks guys!

@Drulee I'll order some of that oil as soon as possible.

@CBR: Where would I find the stop lever? I Have the movement out of the case now.

Guanaco, if you don't already own some oil be warned it ain't cheap (around $33 for small vile of D5)

 

[cybee]

@CBR: Where would I find the stop lever? I Have the movement out of the case now.

Guanaco: the stop lever is #6 in this pic. It looks like it has a direct connection to the keyless works in the 7750.....beyond that I have no idea how you guys work on this movement LOL.

 

[guanaco]

Thanks cybee! @ Drulee, thank you as well! I wonder is stem grease will work just as well?

 

[daytona4me]

Dont forget, I have a lot of the ETA breakdown charts in our RWI Library

Good luck with this, I hate 7750 movement work. I just gave up trying and send them to china to have them tore down.. less frustrating :lol:

 

[Drulee]

Thanks cybee! @ Drulee, thank you as well! I wonder is stem grease will work just as well?

I wouldn't try it, stick to what the ETA charts recommend

Here is a pic of my stem release button (when it's enlarged like this, it seems obvious that it is stuck in the depressed position ):

 

[daytona4me]

guan,

I will email you some 7750 data, forgot,, the charts I have are all pdf and flash,

 

[guanaco]

guan,

I will email you some 7750 data, forgot,, the charts I have are all pdf and flash,

Thanks bro.

 

[d4m.test]

Here is the site I was talking about, Im sure Ive seen it here listed before.
The stop lever is pressed between the barrel and train wheel bridge and the main plate. Unfortunately, although you get to the keyless works from the TOP, you get to the stop lever from the bottom...
It is literally a hocky stick shaped thin piece of metal that is sandwiched between the main plate and the barrel and train wheel bridge plate. The short "tab" of the stop lever fits in to the stem when inserted. When the stem is pressed in a little to vigorously, it pushes the stop lever in too far, and thus the balance assembly is stuck and the stem will no longer operate properly.

Check the video I PM'd you it will show you exactly what you need to fix it.

T

 

[Drulee]

Here is the site I was talking about, Im sure Ive seen it here listed before.
The stop lever is pressed between the barrel and train wheel bridge and the main plate. Unfortunately, although you get to the keyless works from the TOP, you get to the stop lever from the bottom...
It is literally a hocky stick shaped thin piece of metal that is sandwiched between the main plate and the barrel and train wheel bridge plate. The short "tab" of the stop lever fits in to the stem when inserted. When the stem is pressed in a little to vigorously, it pushes the stop lever in too far, and thus the balance assembly is stuck and the stem will no longer operate properly.

Check the video I PM'd you it will show you exactly what you need to fix it.

T

Could you PM me the video as well, as long as it is not the flash assembly/dis-assembly one on eta dot cn site

Thanks

PS. you mention "Here is the site I was talking about", where is the site/link?

 

[d4m.test]

Drulee, that is the flash video/ thingy that I was talking about... Its the same one that has been floating around here for awhile from the eta site.

 

[Drulee]

Drulee, that is the flash video/ thingy that I was talking about... Its the same one that has been floating around here for awhile from the eta site.

Oh alright, I thought maybe you had made a vid of you poking a needle into the stem hole

 

[d4m.test]

Drulee, that is the flash video/ thingy that I was talking about... Its the same one that has been floating around here for awhile from the eta site.

Oh alright, I thought maybe you had made a vid of you poking a needle into the stem hole

Either my mind is really wandering after 4 days of the flu, or that was really a strangely worded statement about the size of my ........... and where I might put it!

 

[Drulee]

Drulee, that is the flash video/ thingy that I was talking about... Its the same one that has been floating around here for awhile from the eta site.

Oh alright, I thought maybe you had made a vid of you poking a needle into the stem hole

Either my mind is really wandering after 4 days of the flu, or that was really a strangely worded statement about the size of my ........... and where I might put it!

:lol: That does sound a bit X-rated, but of course I was referring to your post here http://forum.replica-watch.info/phpBB3/viewtopic.php?p=521887#p521887.

 

[guanaco]

Seriously, God Dammit! =(

 

[Skeletor]

I have found another way to reset the keyless works without dial/hand removal. This just occured to me as I was re-reading this thread to refresh my memory since I messed up another one last night...

Make sure movement is in winding mode. Insert stem and place movement into winding mode, then remove the stem... movement will not run, and other functions will not work, this is OK

Place movement back into the case (as a holder). Now remove the balance bridge and wheel: remove one screw and carefully remove bridge with tweezers, lifting out the wheel on the spring.

Now use a small pin to gently press the stop lever (#6 in pic below) all the way back in. Then stick a pin into the stem hole and wiggle it out gently to be sure the castle wheel & gears are free.

Very carefully re-install the balance wheel/bridge and the watch will now run.

Now re-install the crown/stem as per usual, and if all goes well, you've fixed it... without touching the dial side