[pianotech] Noisey pedal bracket

[Ryan Sowers]

This is one part of piano manufacturing I just don't understand. I service
100 year old uprights with simple wooden trapworks that work smoothly and
noiselessly. These modern metal trapwork systems are a constant source of
problems - it seems that every tiniest noise is greatly amplified, and
sometimes transmitted through the parts making it very difficult to isolate
the source.

The plastic spring cups break, the bushings wear out, the rubber grommets
squeak and wear out prematurely, the brackets seem to click, etc. This is
one example of "they don't make them like they used to" and its a sad thing!
It seems like Yamaha went with this system and then every other Asian
manufacturer followed suit.


On Fri, Nov 12, 2010 at 5:52 AM, Barbara Richmond <piano57 at comcast.net>wrote:

> Scratchy sound?  What part is doing it?
>
> On Yamahas there is a nylon (or whatever it is) spacer/nut on the prop
> under the pedal that can squawk.  No amount of lube will help.  You need to
> detach the pedal from the bottom board, detach the pedal prop from the
> lever.  Put a leather punching--lubed with your favorite grease--between the
> nylon nut and the pedal.  Reassemble.
>
> That's the fix for that squeak.
>
> Barbara Richmond, RPT
> near Peoria, Illinois
>
>
>
> ----- Original Message -----
> From: "Richard Ucci" <richarducci at comcast.net>
> To: pianotech at ptg.org
> Sent: Friday, November 12, 2010 7:10:13 AM
> Subject: [pianotech] Noisey pedal bracket
>
> List, I know this has been covered before , but...
> How do you eliminate that scratchy sound on Asian uprights when the
> sustain pedal is played?
> What is the procedure used? Remove brackets and lube with pianotech
> glide stuff?
>
> Rick Ucci/ Ucci Piano
> www.uccipiano.com
>
>


-- 
Ryan Sowers, RPT
Puget Sound Chapter
Olympia, WA
www.pianova.net
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