More plastic vs. CLP

[Piannaman@aol.com]

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Don,

It was a matter of curiosity to me.  I sincerely love working on Kawai 
products, because of their consistency and ease of tuning.  I work on more of 
them than any other kind of piano; it's only logical that I will run across a 
problem once in a while.

I will cease attempting shortcuts when I deal with this problem.  I've 
burnished and/or repinned in the past, and never had a problem afterward.   I 
will deal with it that way in the future.  No magic potions or elixirs for 
the long term, I guess...

Thanks for the response,

Dave



In a message dated 2/8/03 9:26:27 AM Pacific Standard Time, 
donmannino@attbi.com writes:


> Subj:Re: More plastic vs. CLP
> Date:2/8/03 9:26:27 AM Pacific Standard Time
> From:    donmannino@attbi.com (Donald Mannino)
> Sender:    pianotech-bounces@ptg.org
> Reply-to:    pianotech@ptg.org (Pianotech)
> To:    pianotech@ptg.org (Pianotech)
> 
> 
> 
> 
> Dave,
> 
> The plastic has nothing to do with the difference in your experiences, 
> Dave.  The root cause for the sluggishness will explain what you have 
> found.  Most likely, the wood parts you have dealt with have had poor 
> quality bushings that were never fit well, so some lubrication will get you 
> out of trouble.  The Kawai actions will have high quality bushing cloth 
> that were originally fit properly, but there is something else wrong 
> causing the centers to tighten up.  Humidity alone should not do this, 
> unless they are literally soaked with water.
> 
> You should not put lubricants on these parts - it generally does more 
> damage than good, and does not really address the problem.  If the part is 
> tight, it should be repinned for proper fit.
> 
> If you think the piano is in warranty, you should call one of us at the 
> Kawai office with the serial number to check.  Again, a little draftiness 
> and dampness will not cause action parts to go this tight - there is 
> something else going on, and by trying to use a quick fix you are not 
> diagnosing it.  Do not lubricate it while the warranty is in effect, as 
> this could very likely make you responsible for the action warranty from 
> there on!
> 
> Kawai action centers very become overly tight from humidity - if anything, 
> they tend to be a little on the loose side in dry climates.  Well fit cloth 
> bushings and polished center pins do not need any lubrication to work 
> properly.  When you run into this, take an offending part out, take the pin 
> 



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