[pianotech] More on Yamaha Sticking C6 Key Problem

[Isaac Sadigursky]

369 kopeks are equal to 2c [USA} at $86 of oil per barrell..
On Feb 14, 2010, at 7:18 PM, Carlos Ralon wrote:

> Isaac;
> Your soultions are always correct, but how much are 2 kopeks worth?
> Carlos Ralon, RPT
> ----- Original Message ----- From: "Isaac Sadigursky" <irs.pianos at earthlink.net 
> >
> To: <pianotech at ptg.org>
> Sent: Sunday, February 14, 2010 6:37 PM
> Subject: Re: [pianotech] More on Yamaha Sticking C6 Key Problem
>
>
>> 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:
>>> Here are some more observations on the intermittent problem with  
>>> the  C6 on my Yamaha G1 Piano.
>>>
>>> When I play the key the first time, the note usually sounds, but  
>>> if  I play repeatedly and quickly after that, it stops sounding. I  
>>> have  to wait a few seconds after that for the key to recover,  
>>> before it  will play again. It seems there is a delay of a few  
>>> seconds when  part of the action is slowly getting back into the  
>>> position when the  key can be played. I am puzzled why there is  
>>> this delay.
>>>
>>> When I take the action out and put it on a table, I cannot  
>>> reproduce  the sticking key effect for C6, even if I simulate the  
>>> presence of  the string using a hard book held some distance above  
>>> the hammer (of  course the hammer will not rebound in the same way  
>>> as for a string).  I can cause the hammer to move in fast  
>>> repetition without any  blocking effect. The sticking key effect  
>>> only occurs when the action  is back in the piano. Although I  
>>> doubt it,  I am wondering if this  is a combined effect of the  
>>> damper and the action causing this  sluggish operation, although  
>>> the damper for C6 seems to be working  fine.
>>>
>>> When I look at action for C6 (difficult to see everything due to  
>>> the  proximity of the actions of the other keys, everything  
>>> appears to be  intact.  I haven't removed the whippen assembly for  
>>> C6 yet to  examine it in detail. Maybe I should do that.
>>>
>>> Could anyone throw more light on this? Thanks for your advice.
>>>
>>> Robert
>>
>