[pianotech] More on Yamaha Sticking C6 Key Problem

David Love davidlovepianos at comcast.net
Sun Feb 14 20:25:39 MST 2010


But he said it does it after one play and then the key needs to rest a
second or two.  That doesn't seem quite enough to heat anything up.   

David Love
www.davidlovepianos.com


> Hi,Robert!
> I had watched this thread and here are my 2 kopeks:
> I would suspect "Reversed Pinning" situation:The Jack Center Pin  
> rotates in the Bird Eye and is too tight in the bushing..
> Re-pinning will take care of it.
> During repetitious playing the Center Pin heats-up and becomes too  
> tight,when it cools-off-things are normal ,again.In that condition the  
> center pin passes any test..
> 
> When your technician will do re-pinning,do the following;
> Upon removing the Center pin from the Jack,MEASURE the Pin
> 2]Select exactly the SAME SIZE  Center pin and if you can push it  
> inside the Jacks Bird Eye with your finger nail-it means it's rotating  
> there..You must go to next 1/2 size larger Center Pin
> 3]Try to push that Original Pin in the Felt Bushing and it  
> will ,probably,be TOO TIGHT
> I had found that "Reverse Pinning" in many brand new parts..
> I hope,I made myself clear on that.
> Good Luck!
> isaac Sadigursky, RPT.
> Los Angeles Chaper..
> On Feb 14, 2010, at 2:52 PM, <rsfinley at charter.net> wrote:



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