Hello all,  After two years of sitting (a long story), the suction
no longer goes through the expression box unless I push up on the
Accompaniment bellows a little; then it works.  With a new roll
repeat the process.

The rotary pump is producing vacuum, but it is not passing it through
to the stack.  I was hoping someone could give me a direction as to
where to start.  The crash valve, maybe?  The motor works just fine
during play and re-roll.  The piano has not been moved at all so
nothing has been jostled.

David Zitzmann