Wobbly Grands

Don Mannino dmannino@kawaius.com
Tue, 13 Jan 1998 16:50:00 -0800


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Wobbly grand piano thoughts:

Place one of your fingers at the point where the leg meets the keybed
and wiggle the piano. If you can feel the leg moving in relation to the
keybed, then you should look at the keybed and the tops of the legs (for
flatness).  If the piano used leg plates, then also check them for
tightness and proper mounting. The leg plates should be slightly
recessed in the keybed.

If this isn't the wobbledy spot, then try the finger test at the glue
joint where the lower part of the leg meets the top. A problem here is
usually visible as cracked finish as well, but the finger test will tell
you if it is loose. If so, the leg should be removed and re-glued.
Sometimes this involves disassembling and re-wedging the split tenon (if
any), other times you can simply soak the joint (from the sides and
above) with thin C/A glue.

In some cases caster sockets will be loose - you can carefully try the
finger test there too, but don't let it pinch you! If something lets go
here during vigorous piano rocking you could loose a finger!

Don Mannino RPT, Manager
Kawai Piano Technical Support, US and Canada
DMannino@kawaius.com


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