Mauthe won't chime at 7 o'clock

Discussion in 'Clock Repair' started by Mountain Man, Jun 28, 2020 at 2:59 PM.

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  1. Mountain Man

    Mountain Man Registered User

    Aug 23, 2019
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    My Mauthe grandfather clock chimes correctly on every hour except 7 o'clock. I have the dial off and can see that it clicks and sets up properly on the rack but when it starts to go, the rack hook hangs up and freezes on the first indentation.
     
  2. bruce linde

    bruce linde Technical Admin
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    do you mean the hourly strike?

    i can't imagine what might be different at 7 from the other hours if it works correctly at 6 and 8.

    how about taking a video with your phone, uploading it to youtube, and then copying and pasting the url into a post here to automagically embed the video? that way we could see what's going on.

    in the meantime, you might want to start endlessly at the rack and gathering pallet and see if you can spot where it's binding. you probably also want to make sure the rack tail that meets the snail is not binding there.
     
  3. roughbarked

    roughbarked Registered User

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    I'd be more inclined to look at the tip of the rack tooth at the seven o'clock mark and polish any burrs off?
     
  4. Mountain Man

    Mountain Man Registered User

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    #4 Mountain Man, Jun 28, 2020 at 5:49 PM
    Last edited by a moderator: Jun 29, 2020 at 10:07 AM
    Thanks Bruce, Yes it is the hourly chime. It is a mystery to me also that all the other hours work fine. The video idea is a good one; I am technically challenged but will try to do that. This clock has a cord that you can pull and make it chime. Interestingly, when I do that on the seven o'clock hour it works fine.
     
  5. Mountain Man

    Mountain Man Registered User

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    I did look at the tooth it stops on ( 7) with a strong magnification and it looks good, no different than the others.
     
  6. shutterbug

    shutterbug Moderator
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    It might be the gathering pallet that needs a little tweak. That's the part that lifts the rack up while it strikes. The pin might be bent just a tiny bit off straight. Try setting it a fraction closer to the center of the pallet.
     
  7. Mountain Man

    Mountain Man Registered User

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    Wow! Thanks for that. It gave me an idea. I noticed that the pin that drops into the teeth of the rack wasn't dropping all the way down into the "v" of the 7 o'clock position when it was set up for the strike. It was actually sitting almost on top of the 8 o'clock tooth. So I very slightly tweaked the pin on the tail of the rack so that when it rode on the snail it moved it to the correct starting position. The only reason I can think of as to why it was only a problem at 7 is that maybe the 7 position on the snail was worn more than the other positions.
    I ran it through all the hours and it works perfectly. Can't tell you how happy I am to have this forum available. You guys are awesome!
     
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  8. shutterbug

    shutterbug Moderator
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    I'm glad it worked! That's a strange issue :)
     
  9. roughbarked

    roughbarked Registered User

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    It is a rare issue but it can occur.
     
  10. Mountain Man

    Mountain Man Registered User

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    It is a 1923 clock so that is a lot of wear, but you would think all the positions on the snail would have worn the same.
     
  11. roughbarked

    roughbarked Registered User

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    A defect at birth never goes away.
     
  12. Mountain Man

    Mountain Man Registered User

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  13. claussclocks

    claussclocks Registered User
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    Shutterbug gave you the same suggestion I was thinking. I have seen this happen a few times. You have to consider the geometry of the rack and pallet. Most racks are curved just a bit and somewhere near the middle the slightest error of a bent pin, bent arbor end, or even a worn bushing can throw off the mesh of the pin to rack. When I have seen this it is usually just about the middle of the strike. I have seen it be 5 as well so that 5-7 range is likely going to be the issue.

    DPC
     
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  14. Mountain Man

    Mountain Man Registered User

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    Interesting point DPC. I'm happy that tweaking the pin at the end of the rack seems to have done the trick; it has run on it's own now for over 48 hours and all strikes are good . If it happens in the future it's great to have a panel of experts to come to who have been there.
    Thanks,
    Bob
     
  15. claussclocks

    claussclocks Registered User
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    Remember! An expert is a former drip under pressure. :D:D
     
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  16. Mountain Man

    Mountain Man Registered User

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    "For every expert there is an equal and opposite expert" (Arthur Clarke)
     

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