[pianotech] Monkey Help Needed

[Ed Sutton]

Carman-

See what Ron Nossaman wrote.

My guess is that the spring is pressing the monkey below the level of the keyframe, so that as you move the action in and out, it drags on the keybed, the tip of the pitman or the edge of the hole and the monkey is displaced.

Ed S.
  ----- Original Message ----- 
  From: Carman 
  To: Pianotech Archives 
  Sent: Saturday, July 04, 2009 10:36 PM
  Subject: [pianotech] Monkey Help Needed


    I have a client with a 1902 Chickering grand and I am trying to restore the sostenuto function.
  I have successfully adjusted the distance between the sosenuto rod lip and 
  the tabs on the dampers so it can work.
  The problem is that the monkey keeps slipping off the top of the pitman. 
  Sometimes it skips forward and sometime it slips backward.

  My plan is to drill a hole in the bottom of the monkey and in the top of the 
  pitman and insert a "top pin" in the top of the pitman.
  I'm thinking that the hole in the bottom of the monkey should be a little 
  oversized to allow a fraction of fore-and-aft motion in the monkey.

  I need your critique and your ideas.

  The monkey is identical to the one pictured in "Piano Parts and Their 
  Functions" in the upper right illustration XVII on page 37.

  Carman Gentile RPT
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