Steinway trapwork hinge pin

[David ilvedson]

> Date:          Mon, 27 Oct 1997 17:30:06 -0800
> From:          Baldwin Yamaha Piano Centre <baldyam@sk.sympatico.ca>
> Organization:  Baldwin Yamaha Piano Centre
> To:            pianotech@ptg.org
> Subject:       Re: Steinway trapwork hinge pin
> Reply-to:      pianotech@ptg.org

Great tip...thats just what Baldwin has done for years and I was 
going recommend glue sizing the hole, but your idea is much 
better!

David ilvedson, RPT

> Mark Graham wrote:
> > 
> > On one of our D's here, the L-shaped hinge pin at the top of the damper
> > pedal trapwork works itself out about once a week, to the point where the
> > pedal doesn't function. I've just been shoving it back in, but is this a
> > clear sign to rebush the felt? Or should I make it tight in the wood
> > somehow?
> > 
> > Mark Graham
> > Baldwin-Wallace Conservatory of Music
> > Berea, Ohio
> Hi Mark,
>           Rebushing the felt won't solve the problem even if the trap
> work needs rebushing. Heres a possible solution. Remove the wooden
> lever,
> take a set square and mark through the centre of the pin hole and along
> the surface parallel to the hole, drill a small hole for a set screw.
> file off thesharp tip of the screw. Presto the problem will not reoccur.
>  The other solution but not as effective is to use and over sized hinge
> pin.  While your at it check the mounting blocks to ensure that they are
> not moving  or twisting as that increases wear on the bushings and can
> create some strange noises.
> Hope this helps.
> Roger Jolly.
> 
> 
>