Wakmann Aircraft Clock stopping.

Discussion in 'Clock Repair' started by Syncopator, Nov 16, 2013.

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  1. Syncopator

    Syncopator Registered User

    The manufacturers part number of the clock is W33-7510-10L, and it has a dial of 1⅞" diameter.

    I bought it new, 20 to 30 years ago, from a surplus dealer in the 'States but have haven't run it until fairly recently - about 2 years.

    It has begun to stop, usually but not always, with the second hand between the 7 and 11 digits.
    A swift twist, rotating the clock around the axis of the hand centre, sets it going again. It will then run again for anything between one and several minutes.

    I have no training or specialist knowledge in these matters. I am, however, dexterous and practical.

    I wonder if there is anything realtively simple which I might do to cure the problem?

    Being retired, I would like to avoid the expense of taking it to a professional, but can't rule this out as I really want it to work properly.

     
  2. shutterbug

    shutterbug Moderator
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    Oct 19, 2005
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    20 or 30 years is long enough to create issues with the pivot/plate relationship which would require professional help. Oil dries up in time too, or is absorbed by dust which makes it act like a mini file to cause damage and plug the pivot holes with debris. I would invest the money it takes to bring it back to a near new condition so you can enjoy it and pass it on when the time comes. Be sure to use a quality watch repairman. It sounds like a little guy :)
     
  3. Syncopator

    Syncopator Registered User

    Yes, shutterbug, what you say makes complete sense.

    I shall make a few 'phone calls.

    I think I will also take a couple of photographs to post here.
     
  4. Syncopator

    Syncopator Registered User

    These are the photographs I took of it this afternoon.

    aircraft clock 1.jpg aircraft clock 2.jpg clock mount 1.jpg clock mount 2.jpg mounted clock 1.jpg mounted clock 2.jpg mounted clock 3.jpg
     
  5. Kevin W.

    Kevin W. Registered User
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    It likely has a watch type movement, i would suspect it is in need of a clean and oil, not many short cuts one can take.
     
  6. Syncopator

    Syncopator Registered User

    #6 Syncopator, Nov 25, 2013
    Last edited by a moderator: Nov 25, 2013
    Further information regarding Wakmann Aircraft Clock stopping

    I have now discovered that the clock runs satisfactorily if it is laid on its back (staring up at the ceiling).

    When in the normal upright position it stops between digits 7 and 10, or thereabouts.

    What is the significance of my new observation?
     
  7. shutterbug

    shutterbug Moderator
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    Re: Further information regarding Wakmann Aircraft Clock stopping

    I moved your new information to the original thread Syn. Yes, the symptom is consistent with badly worn balance wheel cups and/or points. You'll need to reshape the cups or the points on the balance arbor. Use search to learn how to do that if you're not sure.
     
  8. Syncopator

    Syncopator Registered User

    Re: Further information regarding Wakmann Aircraft Clock stopping

    Thank you Kevin.

    Horology is not my forte, so, although I am quite dexterous, I will leave it to an expert - once the expense of Christmas is over.
     
  9. Kevin W.

    Kevin W. Registered User
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    Re: Further information regarding Wakmann Aircraft Clock stopping

    Shutt i might be wrong but i doubt you will find regular cups on this clock. It would have to be very well made to be for aviation usage. I would suspect dried oil in the jewels holding the pivots of the balance staff and in general in need of a clean and oil.
    Basing my opinion of most aircraft clocks i have seen.
     
  10. shutterbug

    shutterbug Moderator
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    Re: Further information regarding Wakmann Aircraft Clock stopping

    You could be right, Kevin. Could be a cracked jewel too.
     
  11. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Seems like an Elgin 562 movement
     
  12. kinsler33

    kinsler33 Registered User

    Aug 17, 2014
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    Does it have a luminous dial?
     
  13. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Should not be selfluminious or radioactive. these clock has uv luminious paint which illuminated at ni by UV light in cockpit. rest Mr Syncopator may kindly confirm
     
  14. kinsler33

    kinsler33 Registered User

    Aug 17, 2014
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    That was my concern. I just finished a book on radium, and it was used just about everywhere before it was found to be so dangerous. Everyone thought it would make you healthier, and they made self-luminous wall paint as well as radium-infused toothpaste.

    Mark Kinsler
     
  15. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Dear Mark,
    You are right it was used everywhere. If you have a gieger counter it would clear the matter else Safest method is to ultrasonically clean the hands in which case the powder goes in solution and you dispose the solution properly. Hands can be coated again with luminous paint
     
  16. Sanjay Bajpai

    Sanjay Bajpai Registered User

    Dec 6, 2018
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    Dear Mark
    A simple method to check without Geiger counter.
    Place small amount of luminous powder onto the hands. Be careful not to spill. Wait about 40 mins. Place your luminous powder tube/bottle next to the clock to be tested on whose hands you have placed a little powder.
    Observe in dark. If the dial markings are radioactive the powder will glow while the bottle being away will not.
    This is the surest way to confirm radioactive material in old clock dials n hands.
     
  17. Kevin W.

    Kevin W. Registered User
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    Or you could just send me the clock and you have no worries.:D
     

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