Misbehaving Monkey (Reply)

[FRED W TREMPER]

David et al:

No, the spring is centered on the monkey.

Fred

On Fri, 30 Apr 1999, David ilvedson wrote:

> Fred,
> 
> Is it slightly off center of the monkey?  Could the whole 
> mechanism being moving more than it should forcing the 
> spring if off center to pop off.  I've never seen this problem.  
> The spring and monkey must be square, not tipping one way 
> or the other.  Is the monkey firmly in the slot on the keyframe? 
> Interesting problem...
> 
> David Ilvedson, RPT
> 
> 
> Date sent:      	Fri, 30 Apr 1999 20:21:07 -0400 (EDT)
> From:           	FRED W TREMPER <f.trempe@morehead-st.edu>
> To:             	pianotech <pianotech@ptg.org>
> Subject:        	Misbehaving Monkey
> Send reply to:  	pianotech@ptg.org
> 
> > Dear Friends:
> > 
> > An interesting problem has risen, one I have never seen before.  Perhaps 
> > you can offer a solution.  I know what the problem is, but I do not know 
> > how to solve it.  Let me explain:
> > 
> > While tuning a Steinway model D for a concert, I notice that occasionally 
> > if not frequently one of the notes, in this case C5, would remain off the 
> > string.  By pulling the action forward as far as possible the note would 
> > not stick, but sooner or later the problem would reoccur.  I realized 
> > that the sostinuto tabs on the dampers were too far forward and were 
> > catching on the sostinuto rail.  But why?  I found that the flange on the 
> > sostinuto rail was in the upward position (that is, about 9 o'clock when 
> > viewed from the bass end).
> > 
> > I looked around and found that the spring that holds down the sostinuto 
> > monkey had slipped out.  The flange on the sostinuto rod then worked its 
> > way to about the 9 o'clock position which then caused C5 (and sometimes 
> > other notes) to hang up on the flange.
> > 
> > So much for the problem and the solution.  My question is, Why does the 
> > spring slip out?  What can be done to keep it from slipping out?  As you 
> > know, the spring should not slip out whether or not the sostinuto pedal 
> > is engaged.
> > 
> > What to do?
> > ------------------------------------------------------------------------------
> > Fred W. Tremper, RPT
> > Morehead State University
> > Morehead, KY 40351
> > f.trempe@morehead-st.edu
> > ------------------------------------------------------------------------------
> > 
> > 
> 
> 
> David Ilvedson, RPT
> Pacifica, CA
> ilvey@jps.net
> 

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Fred W. Tremper, RPT
Morehead State University
Morehead, KY 40351
f.trempe@morehead-st.edu
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