American PW Brain lapse with a Hamilton 4992b

Discussion in 'Watch Repair' started by musicguy, May 6, 2020.

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  1. musicguy

    musicguy Moderator
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    Jan 12, 2017
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    Brain lapse with a Hamilton 4992b

    Yesterday I was working on a 4992b and all I needed to do was
    put the dial and hands back on. My mind must have skipped a beat because
    I thought I broke the balance(but I hadn't). The balance was stuck in one position and
    not moving. I loosened up the balance cock and still no movement.
    I removed the balance and tried to re install the balance but after 20 unsuccessful tries and
    a lot of stress I realized that I had a temporary laps of brain function.
    This watch (and I know it and was looking at it earlier in the day)
    has a hacking feature. When the watch is apart and the stem is removed
    the default is that the hack is up against the balance wheel(holding it in place).
    Obviously(and I knew it) I needed to push the stem in and release the hack so I could reinstall
    the balance correctly(which I never had to remove in the first place). I did that and the watch was back together a few minutes
    running well.


    Rob
     
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  2. Jim Haney

    Jim Haney Registered User
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    Sep 21, 2002
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    Been there and done that on more than 1 occasion, it is easy to do because you very seldom work on hacking watches.

    I am glad you didn't force the issue and need a staff. :eek: ;)
     
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  3. Chris Radek

    Chris Radek Registered User
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    Apr 13, 2014
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    I had a similar problem with a Seiko 6106A which has a hack mechanism. I had not installed the keyless works and stem, so the hack spring was loose. In one vertical position it would fall against the balance and stop it. In the rest of the positions, it ran fine. I had just jeweled the dial side barrel arbor hole, because it was worn and the balance was touching the barrel, and so of course that was still what was on my mind.
     
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  4. fijidad

    fijidad Registered User
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    Feb 28, 2010
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    Some time ago I purchased a nice looking and substantial key wind and set English center seconds pocket watch that was sold as not running.

    Upon receipt, the first think I did was move the hack slide and it started right up and ran very well. Luck of the Norwegians.

    Hack.JPG
     
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  5. musicguy

    musicguy Moderator
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    Jan 12, 2017
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    It doesn't happen too to often but it sure is nice that when
    you think you really messed something up only to find
    everything is really OK.


    Rob
     
  6. GeneJockey

    GeneJockey Registered User
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    Mar 2, 2012
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    This has absolutely never happened to me. I never picked up my Elgin BW Raymond Railroad Wrist Chronometer, pulled out the stem to set the time, and then panicked when I observed the stationary second hand.

    Nope.

    Not ever.
     

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