Tight wippen centers

[Carl Meyer]

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Use a zapper.  Enough current through the pin to heat it.  A 12 volt 3 =
amp transformer will do it in about 5 seconds.  But try it slowly.  It =
might need to smoke to do the job.

Carl Meyer  Assoc. PTG
Santa Clara, California
cmpiano@attbi.com=20
  ----- Original Message -----=20
  From: Dave Bunch=20
  To: pianotech@ptg.org=20
  Sent: Monday, March 31, 2003 7:30 PM
  Subject: Tight wippen centers


  Seven years ago I had a customer with a Wurlitzer console that had =
very tight wippen centers. After finding that a bit of center pin lube =
was not going to do it, I treated them with Baldwin's bushing shrinking =
formula of methenol, water and dissolved Ivory soap chips. I dried them =
with the heat gun and it seemed to work fine. Now seven years later she =
wants to sell the piano and the wippen centers are sluggish again. Part =
of the problem is that the console action and keys are so light, that =
any friction anywhere is going to keep the action from returning.

  I could repin them, but she doesn't want to spend that much since =
frankly, the piano is not worth that much. Does anyone have a sure fire =
bushing treatment that will loosen the most stubborn centers?

  Dave Bunch
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