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Colombianguy_III

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 #1 
Hey there,

My Hohner Corona III (94 model) is getting a lot of air leaks as I play. The Pins even push out. This really has been a problem for a while... Anyway, I checked bellows and they are in great condition (no holes inside bellows) . Could it be the bellow gaskets that need replacing? If so, what is the cost of a bellow gasket? Are they easy to replace?

Thanks. 


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fgarza

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 #2 



     This happened to my friends accordion. You might need to replace the gaskets, or if your bellows have wooden frames, they might be warped. My friends frames were warped, so I filled them in with bondo and sanded the bond with a straight edge piece of wood and sand paper until it was level. I then replaced the gaskets, and it was as good as new. 

If you don't know if they are warped, put a ruler on the bellow wood frames, and if there is a gap, the frame is warped.


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artlsx10

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 #3 
Same happened to me. Bellows had no internal leaks. I replaced the gaskets and still had leaks where the gasket seals to the box. I noticed that the wood brace of the bellows is warped. Tim suggested I use card stock to build up the low areas and seal properly. What I did was I made gaskets from the boxes they give you to gift wrap clothing. I made two, one for each side. Sealed up perfect. No more leaks. I'll post up pics later.
tim_g_schofield

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 #4 
The shimming of the gaskets is an easy fix. If you are leaking around the bellows pins, you may need to install larger diameter pins if it's bad. If its not bad you could you a little accordion reed wax to help hold them in and seal the air loss at the pin. Make sure it's accordion reed wax that has rosin in it so it sticks, otherwise it will just make a mess and not work. 
squiz1box

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 #5 

I have a Castiglione that has like black plastic strip frame where the pins go in. To me it seems to be a sort of  "self-healing" strip. I've taken the treble part off several times and the pins go in real tight.  Something like that might could be used on the new model Hohners. Wood does eventually wear off and you get pins slipping out too easily.

artlsx10

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 #6 




Here's what I did. It raised the sealing surface enough to compress the gasket tighter on the warped areas. Better than paying a lot for new bellows.
squiz1box

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 #7 

Good, very ingenious.

Colombianguy_III

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 #8 
Nice!! Thanks all!! I'm going to try it!! God bless you all! The Lord always helps me find great solutions...Blessings to you all!

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tim_g_schofield

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 #9 
If it's warped you will have to shim it in the middle to level where it's warped. If you shim all of it it may not take care of the warp. You can also add a third bellows pin.
artlsx10

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 #10 
It worked for me. The center of my gasket was not touching at all. I tried shimming just the areas that were leaking, but this just moved my air leaks to different areas. I figured a full "spacer" would compress the bellows gasket, already sealing properly, more and allow the leaking areas to seal. Has worked great to this day.
Colombianguy_III

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 #11 
Thanks guys!!!

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elpirishuiris

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 #12 
I siliconed it one side at a time. Let one side dry > pry it apart. Then do the other side.  It is hard to pry it apart, I had to get in there with a screw driver or something making sure not to break anything. I pried against the wood that holds the reed blocks in place; the edge of the bellows frame might get a little dented. Once you get it going then you just muscle it apart. You have to glue back on any silicone that lifts off.  For a perfect seal it is worth the trouble.
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