Wurli growing action brackets?

[Tom Driscoll]

hTo: deanmay@pianorebuilders.com; Pianotech
Subject: Re: Wurli growing action brackets?

The first symptom that I have seen is blocking hammers. The metal action
brackets have swelled and you will waste your time to try to regulate.
Norm Barrett
Memphis chapter
	
Dean,
	Norm is right on with his post. Another clue is that the let off
dowels (Young Chang nomenclature?) will be falling off the threads from
trying to adjust-compensate for the blocking hammers.
	Checking can be way out of whack also.
	The brackets though dimensionally unstable will look just fine.
No cracking or any other visual abnormalities.
	Tom Driscoll



> Would somebody give me a description of what a growing action bracket
is?
> Could that be what is causing a couple of YC grands I work on to be
> constantly out of regulation?
> 
> Dean
> 
> Dean May             
>