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need service manule


vinn3

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3 hours ago, Nucejoe said:

Valjoux 724 was produced for a short time and was replaced with 729 .

Manual of which would do, If you can find one.

Ni

   thanks;  that answers a few questions in my search.!  the first  is which screw holds the stem in.

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8 hours ago, vinn3 said:

   thanks;  that answers a few questions in my search.!  the first  is which screw holds the stem in.

To release the stem you loosen the lower one of the two screws by the stem.
I attache a service manual to the 72 but unfortunately with the wrong complication but in the 60's the tech sheets didn't always be the best.  ;) 
If you need more help it's better to continue in an other thread.
 

Stem release.jpg

Valjoux 72_88_721.pdf

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Nivada:  The 30 mm mvt. is out of the case and stem "set in place".   you might notice,  i had to remove one of the levers to get a straight shot at the secont case screw.   i'll replace it and move on to cleaning.  vin

fair shot.jpg

open case.jpg

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    steping back from a complicated mvmt. repair;  i opened  a 1950's west clock wrist watch.  German made case and US mvmt..  it has a very unique stem set lever.  one of the 4 scews holding the back plate holds a lever attached to the stem set pin.  vin.

008.jpg

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33 minutes ago, Watchtime said:

Westclox was founded in 1885 In Illinois by Charles Stahlberg and wellknown for the Big Ben and Baby Ben alarm clocks...They also had a plant in Scotland...

 

33 minutes ago, Watchtime said:

Westclox was founded in 1885 In Illinois by Charles Stahlberg and wellknown for the Big Ben and Baby Ben alarm clocks...They also had a plant in Scotland...

    thanks. i've delt with" the bens"   years ago.  did not know of a wrist watch.  the alarm clocks are still sold in the U S , but,  they are bad,  half plastic  and the alarm off button is bad too.   its marked made in u.s.a..    i wounder?     vin

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    • Yeah, I saw that in the tech sheet but I don't see how it can be adequately cleaned with the friction pinion still in place. I've accidentally pulled the arbor right out of the wheel once when I used a presto tool to try and remove it. Mark shows how he does it with the Platax tool. Those are a little too pricey for me so I got one of these from Aliexpress and I just push down on the arbor with the end of my brass tweezers. That usually gets it most of the way out and then I just grab the wheel with one hand the and the friction pinion with the other and gently rotate them until it pops off. Probably not the best way but it's seemed to work for me so far.    
    • Thanks, Jon Sounds like a plan. Obviously I'll have the face on so do you think gripping with the holder will create any problems, but I will check in the morning to see how feasible it is but I assume it only needs to be lightly held. As for holding the movement instead of the holder won't be possible in this scenario as one hand will be puling on the stem while the other pushes the spring down. That was my initial concern is how the hell can I do this with only one pair of hands. All the other times I've had to remove the stem hasn't been a problem, apart from the force required to release the stem from the setting lever, but now I need to fit the face and hands its sent me into panic mode. If it had the screw type release things would be a lot simpler but that's life 😀   Another thing I will need to consider is once the dial and hands are fitted and the movement is sitting in the case I will need to turn it over to put the case screws in. I saw a vid on Wristwatch revival where he lightly fitted the crystal and bezel so he could turn it over, is this the only option or is there another method?      
    • Hi Jon, do You think that relation spring torque - amplitude is linear? I would rather guess that the amplitude should be proportional to the square of the torque. I had once idea to check it, but still haven't.
    • I did not. I thought about it, but I had cleaned it in my ultrasonic, and the tech sheet shows lubricating it in place already assembled, so I figured discretion was the better part of valor. Although since I have to depth the jewels anyway, maybe I pull the pinion off to rule it out 100% as part of the problem. Do you know if there's a safe way to do it? I don't want to use a puller because it would push down on the plane of the wheel, and that seems like a Bad Idea. I thought about using a roller table remover, but I don't think I have a hole stake pointy enough to push it down.
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