[ John Rutoskey wrote in 140930 MMD, "There is no such thing as a
 [ repair or rebuilding manual written specifically for coin-operated
 [ pianos and orchestrions."

I have to second this opinion.  In my fifty years of restoring coin
operated pianos I agree with John Rutoskey that _no_ rebuilding or
service manual has ever surfaced on coin pianos.  No tubing diagram
-- nothing.  Only a tracker bar scale.

My belief is that if you are good enough to restore the pneumatics
and valves then you should understand what everything does and how it
works.  Unfortunately many a piano was restored by someone who did not
really understand how all the parts were supposed to function, therefore
leaving a mess.

We had one piano come in that had 13 gauge strings on every string down
to the bass.  Then there have been pianos that were covered in white
glue or yellow carpenter's glue that had to have many parts made new.
If you do not know what you are doing then please find someone to help
you!

My next project is to make a complete set of Coinola pneumatics that
someone hacked apart and glued back together with white glue.  This
more than doubles the work for a restorer.

Don Teach - Shreveport Music Co.
Shreveport, Louisiana