The Young Chang Blues

[Don Mannino]

All,

I will try to tiptoe on eggshells here, and give a reply, even though I'm not
associated with Young Chang any more:


Tom Cobble RPT wrote:

>>#1 YC  action centers with little or no movement.  the friction is
unbelieveable! <<

Extensive testing was done with every lubricant imaginable in an effort to find
a cost effective way to resolve this problem. None were satisfactory in my
opinion, including Protec. Repinning was the only permanent, controllable
solution.

Drying out of the wood is not an issue - drying the flange wood would make the
pin tighter in the birds-eye. If the pins are loose in the flange, it is
possible that the wood was too dry in the factory during drilling, causing the
pin to become loose when the wood takes on moisture.  This is one advantage of
using ABS for flanges (had to get that in there somehow!).

Before any work is done, you should call Phil Glenn at Young Chang and talk it
over, see if they have found any other solutions, find out if the piano is still
in warranty, and if this would be covered.

Very accurate repinning of one rail can be done in well under 2 hours after some
practice, especially with new-ish parts.

>>#2. This is where it gets tricky...  The escapement feels like  you're
falling off a short but very steep and sharp cliff<<

There are 3 Young Chang grand actions, and the solution could vary according to
which one you have. Generally:
      - it will be much better if the friction in the centers is correct.
      - The jacks are possibly regulated too far under the knuckle
      - The knuckle shape has flattened
      - The action spread is wrong
And many other similar basic regulation / reconditioning points could be listed.
Some YC actions prefer minimal aftertouch.

Cheers!

Don Mannino RPT