seized regulating screws

[Tom Servinsky]

Here in the tropics, frozen regulating screws are a normal occurrence. Our 
solution is to spray liquid wrench, let it set in for a few minutes, then 
follow up with a heat gun. You have to gently turn the screw back and forth 
until the corrosion breaks the hold.
Works great on the let off rail. However if it's regulating screws within 
the wippen I would hesitate to use this procedure as center pins could get 
damaged and cause further problems.
Tom Servinsky
----- Original Message ----- 
From: "David Nereson" <dnereson@4dv.net>
To: <pianotech@ptg.org>
Sent: Monday, September 12, 2005 3:29 AM
Subject: seized regulating screws


>    I and others have asked about this before, but I don't remember getting 
> any answer that was practical/viable/workable/satisfactory.  Is there 
> anything that can be done to loosen up regulating screws that are 
> "frozen," or seized-up in the (wooden) regulating rail?  Protek doesn't 
> help.  Heating with a soldering iron or butane torch doesn't help.  Has 
> anybody tried WD-40 or some rust dissolver like Aero-Kroil?  Do you just 
> have to make a whole new rail? As for bending the entire rail upwards, to 
> get the let-off closer to the strings, instead of trying to turn, and thus 
> breaking off, all the screws, those regulating rail props are flattened 
> such that they prett' near prevent any bending at all in the up-and-down 
> direction. What do y'all do?
>    --David Nereson, RPT
>
>
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