How do I let down the mainspring?

Discussion in 'Clock Repair' started by mproulx, May 16, 2019.

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  1. mproulx

    mproulx Registered User

    Jul 8, 2009
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    Montreal, Canada
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    Hello,

    I have this Kienzle clock that was taken to my shop to be overhauled, see attached pictures. First time I get one of those and I just don't know how to let down the mainspring. I would greatly appreciate any help as I don't want to ruin the movement.

    Thank you in advance


    Kienzle1.jpg Kienzle2.jpg
     
  2. R. Croswell

    R. Croswell Registered User

    Apr 4, 2006
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    Never seen one like this but with any clock that will run I like to begin by allowing it to run down as far as it will on its own first. That will usually make it easier to let down the spring once you find out how to get to it.

    RC
     
  3. mproulx

    mproulx Registered User

    Jul 8, 2009
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    Thanks for your reply. Unfortunately the clock does'nt run at all. The mainspring is wound with the outer knob we see in the back and to get to the mainspring, I have to remove that knob. This is how it is once the knob is removed, see the attached picture.

    Kienzle3.jpg
     
  4. Kevin W.

    Kevin W. Registered User
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    Apr 11, 2002
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    Can you put something on the post that holds the winding knob and slowly let down the power.
     
  5. mproulx

    mproulx Registered User

    Jul 8, 2009
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    Thank you guys, I figured how to do it. I held the brass drum and slowly let it unwind as I released the click a bit at the time. I appreciate all your replies and wish you all a great day.
     
  6. wow

    wow Registered User
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    Jun 24, 2008
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    glad you got it
     
  7. Kevin W.

    Kevin W. Registered User
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    Apr 11, 2002
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    Glad you got it done, some clicks are in bad places and hard to let down power.
     
  8. shutterbug

    shutterbug Moderator
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    Oct 19, 2005
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    Some clocks really challenge your abilities! Ever try to let down the spring on the German Time Bomb? Lots of fun! :D
     

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