[CAUT] Young Chang action troubles (?)

[wimblees at aol.com]

Mark



As a couple of guys have told you, the action brackets have grown. Weird phenomenon. Call YC and ask to send you new ones. Unfortunately, since you did a lot of regulating, it will be more difficult to get the action back to where it is supposed to be. Phil has taken 5 - 6 hours.?It only took me 2 hours to regulate the action once I got the brackets on.?But then no one had done anything to the action before I got to it. The hardest part might be getting the action out in the first place. 

Wim 

-----Original Message-----
From: Cramer, Mark <Cramer at brandonu.ca>
To: CAUT at ptg.org
Sent: Tue, 25 Sep 2007 4:48 pm
Subject: [CAUT] Young Chang action troubles (?)




I worked on a 15-year-old Young-Chang grand for a new client today, and the 
action has REAL problems.

Some of the issues I've either seen before, or read discussions about here on 
our list, i.e.: "bad knuckles & seized action centers."

However, one thing has me perplexed, and as I don't see very many of these 
instruments, would appreciate the experience of you those of you who have.

The big question is why "ALL" hammers were blocking at the strings? (no let-off)

I gave all the buttons a quick 1/2 turn down and went ahead with tuning and 
assessment. What set me off though, is this is the same intial intoduction I had 
to one other Young Chang grand, four years ago, and I've yet to solve it!

With that instrument, I followed the initial visit several weeks later with a 
re-tuning and a one-day regulation. That particular piano appeared much like 
brand new, and I was quite pleased (read "smug") with the results.

When I returned six months later however, let-off had dropped below the point of 
drop contact! (?) 

I spent a 1/2 hour poking around for clues... loose let-off rail, change in 
humidity, loose action brackets, severed key-bed, loose plate fit, etc., but 
came up "empty."

So, I restored let-off, tuned, and left it at that. 

A year later the client had moved, and I returned for tuning. The hammers were 
blocking once again! Yipes!

Now, seeing this symptom on another YC has me wondering what's at work here? Can 
anyone shed some light?

BTW, I've read in past about YC action brackets "growing". 

I've seen that about twenty years ago on a mid-century "Zimmerman" (East 
Europe/mid-quality). In that case, I had a machinist mill new brackets from 
aluminum. Nice work, but the orignals were so messed that determining original 
dimensions was a real chore!

Neither bracket-sets on either of these actions though have the cracks and 
"bloated" appearance those Zimmerman brackets had.  

Any clues?

much thanks!

Mark Cramer,
Brandon University
 




 



 





  



 
 

 




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