[pianotech] shrinking with H20 & alcohol-revisited

[Don Mannino]

David,

 

After being lubricated over time, it is not likely that Alcohol and Water
will do much.  The tightness could be caused by things other than simply
tight bushing cloth (burrs on pins, distorted old hammer flanges, etc.),
plus the lubricants tend to reduce the ability of the water to do anything –
the cloth doesn’t swell then shrink like it should.

 

It’s best to apply it with a dropper to the individual bushings.  Rubbing
alcohol is a good mix, and if you watch closely with good lighting you will
see if the water is penetrating the bushings – it should wick right into the
cloth.  If not, then it’s not likely to do any good.

 

If you might have to take the flanges off the rail, why, then you are
already done with ½ of the repinning job.  Just ream and repin and be done
with it.

 

Do watch for flanges that squeeze and distort when tightening the screws.
This is pretty common with old wood flanges.  If the fit is tight when it is
in on the rail, but becomes free when you unscrew it, that is very likely
the source of the problem.  So new flanges would be the answer, and this
would also eliminate the oily bushings from the piano while you are at it.

 

Don Mannino

 

-----Original Message-----
From: David Weiss < <mailto:davidweiss at embarqmail.com>
davidweiss at embarqmail.com>
To: pianotech < <mailto:pianotech at ptg.org> pianotech at ptg.org>
Sent: Sat, Mar 10, 2012 1:17 am
Subject: [pianotech] shrinking with H20 & alcohol-revisited

 

I have an old upright with perennial tight action centers.  Protek provides
only  temporary relief so I want to try using H2O with alcohol. 

 

Can I apply the alcohol to the hammer flanges without removing them from the
rail?  My concern is that the water/alcohol mixture will run over into onto
the hammer butt or spring punching and loosen the glue.

 

Thanks,

 

David Weiss

From:  <mailto:pianotech-bounces at ptg.org> pianotech-bounces at ptg.org [
<mailto:pianotech-bounces at ptg.org?> mailto:pianotech-bounces at ptg.org] On
Behalf Of Tom Driscoll
Sent: Friday, November 25, 2011 10:13 AM
To:  <mailto:pianotech at ptg.org> pianotech at ptg.org
Subject: Re: [pianotech] piano behavior - shrinking with H20 & alcohol

 

Rick,

 I use denatured alc mixed 50 -50 with water.

 Tom D.

Subject: Re: [pianotech] piano behavior - shrinking with H20 & alcohol

 

What is the ratio of water to alcohol ?

Rick Ucci 

 <http://uccipiano.com/> Uccipiano.com


 

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