Separated back again

[Richard Moody]

A Gulbransen ex player with 3/4 plate the pin block has pulled loose 
AGAIN!!!.  I gotta take a pict of this and send it to Susan Kline.  
	If any one has done this repair to a similar Gulbransen and would like to
share info please feel so inclined.  
	Of interest, it is close enough to a'440 for the church choir.  No I
didn't let down the tension before I drayed it home over 20 miles of
gravel roads. I got this in trade for a few hours work on a  Cable  pump
organ. 
	
	With all these "micro" lists springing up, anyone want to start a 'pump
organ' list?  ; ) 

Ric O'Pumper




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> From: pianoman <pianoman@inlink.com>
> To: pianotech@ptg.org
> Subject: Re: Separated back back
> Date: Saturday, August 22, 1998 7:49 AM
> 
> Hello
> You didn't say if you let down the tension?
> James Grebe
> R.P.T. of the P.T.G.
>  Since 1962 in St. Louis, MO
> Home of Handsome Hardwood Caster Cups
> pianoman@inlink.com        
> 
> ----------
> > From: Clyde Hollinger <cedel@redrose.net>
> > To: pianotech@ptg.org
> > Subject: Separated back
> > Date: Saturday, August 22, 1998 6:44 AM
> > 
> > Friends:
> > 
> > Several months ago I asked your advice on repairing a separated back
on
> > an Everett school piano.  Just in case you're interested, here's how
it
> > went when I did the job this week.
> > 
> > I pulled the back together with three clamps where it was separated;
> > removed the center plate screw (along the top edge) and drilled
through
> > the back at that place, as well as making two new holes, one about 8"
on
> > either side of where the screw was, on the flat surface; put the 5/16"
> > carriage bolts into the holes but didn't tighten them; released my
> > clamps and worked 90-minute epoxy into the crack; retightened the
clamps
> > as much as I felt I should; tightened the three bolts until they were
> > very snug; cleaned away the epoxy that squeezed out the top; left it
set
> > overnight.  When I took the clamps off the next day, nothing moved an
> > iota, as far as I could tell, and the repair is very neat, although I
> > might still cut off the unused bolt ends sometime.
> > 
> > One question:  I didn't pull the back all the way together, since
> > resistance (originally about 1/8") while tightening the clamps was
> > getting very high.  The crack was still 1/16 inch at the most.  Was I
> > right to just stabilize the back the way I did, or should I have tried
> > to force the thing the whole way?  I didn't want to break anything.
> > 
> > Clyde Hollinger, RPT
> > Lititz, PA