[pianotech] Monkey Help Needed

Carman cgpiano at suddenlink.net
Sat Jul 4 20:36:23 MDT 2009


  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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