Sangler & Sohne Serial Seizing Centers

[John Ross]

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Re: Sangler & Sohne Serial Seizing CentersHi Joseph,
Yamaha has a tool they use to centre the jack in the window, to do this =
it bends the pin. It is used just in the wippens, as far as I know.
Regards,
John M. Ross
Windsor, Nova Scotia, Canada
piano.tech@ns.sympatico.ca
  ----- Original Message -----=20
  From: rufy@rcn.com=20
  To: pianotech@ptg.org=20
  Sent: Friday, May 18, 2001 2:33 PM
  Subject: Re: Sangler & Sohne Serial Seizing Centers



  Dave,=20

  This reminds me of experiences I've had with some Yamahas (and =
possibly others). When I remove the centerpins I find that they are =
bent. You replace with the same size or next size up and they are free =
and remain so. I've wondered (as these are invariably original pins, =
same size as all the others) if sometimes as an action is being =
assembled in the factory, workers bend the pins to create alignment =
(squareness or travel) in a part. Then in time, the pin moves slightly =
laterally or turns a bit as it loosens in the wood and in its new =
configuaration causes the part to seize. You try all the others, and =
they are fine; then a few months or a year later a few new ones turn up =
tight.

  Have you noticed if those pins were bent??

  Joseph Giandalone,RPT
  =20

  ----------
  From: "Dave Bunch" <pdtek@home.com>
  To: <pianotech@ptg.org>
  Subject: Sangler & Sohne Serial Seizing Centers
  Date: Fri, May 18, 2001, 12:06 PM



    I service a three year old Sangler & Sohne in a nursing home. Among =
its many problems is that as time passes, the centers start seizing up a =
few at a time. I mean they will be fine when I am there tuning an a =
month later five whippen centers will be so tight you can barely move =
the flange by hand! Protek won't touch it. I have to repin them, check =
the rest of them. Everything is fine then I get a call a couple months =
later and there are several new ones. Is glue leaching through the =
bushings? Is there any solution besides repining the whole action? They =
would hit the ceiling with that suggestion. Anyone else seen this?
    =20
    Dave Bunch
    =20


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