[CAUT] Young Chang action troubles (?)

[Keith Roberts]

It's the expanding action brackets. You can get new ones I believe. The
company that was making the actions for YC had a bad batch of pot metal when
the made the brackets. It was under warrenty and takes about 5 hours to
change them out.

Keith Roberts


On 9/25/07, Cramer, Mark <Cramer at brandonu.ca> wrote:
>
> 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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