[pianotech] Broken hammer shank on a Yamaha Spinet

Bruce Browning - The Piano Tuner justpianos at our.net.au
Sun Oct 11 00:24:03 MDT 2009


Rob,
Remove the action for your repair.
Remove 2 neighbouring hammer assemblies and use clamped either side for
accurate hammer position.
Sometimes it's quicker the long way!!




> I've attached a photo of what it currently looks like.  The extra glob
> of glue is from the owner's attempt to use gorilla glue to fix it.  He
> said it worked for about 10 notes and then broke again.  I have a new
> hammer shank I'm going to use.
>
> My problem is this...  Normally I would glue one end into the hammer
> butt and then dry fit the hammer so the height matches the neighboring
> hammers. I would then cut off the excess above the top edge of the
> hammer. This hammer, though, is not drilled all the way through, so
> that option is out. (see photo)
>
> I could attach the hammer to the shank and then dry fit the butt end,
> trim as necessary and then glue, but I don't want to attempt to glue
> the shank in place when it's way down into the drop action.  I'm
> afraid of getting glue on something I don't want way down in the abyss
> of the action.
>
> I could also remove the butt/flange and glue the shank outside of the
> action once the correct length has been determined and then put it
> back in, but getting to the flange screw is a royal pain in the...
> well... hammer butt. It almost takes one of those "cirque du soleil"
> feats of body twisting to use a thin screwdriver from underneath the
> keybed, between the stickers, while holding the top part from above
> the action.
>
> So... I'm trying to find an easier way to get the correct length
> without getting glue all over the place or having to remove and
> replace the butt flange multiple times.  Any ideas, sequences, or
> tricks?  Other than hire an apprentice, that is? :-)
>
>
> Rob McCall
> McCall Piano Service, LLC
> Murrieta, CA
>
> rob at mccallpiano.com
> www.mccallpiano.com
> 951-698-1875
>
>




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