I shall probably be shot dead, but I have successfully used white PVA
archival reversible glue for the repair of air motors on player pianos,
player organs and organettes.  It is a special pH neutral adhesive with
reversible qualities, supplied by

  Russels,
  England;
  Tel +44 1480 405 464
  Fax +44 1480 407 105
  email <john@russels.com>
  web site: http://www.russels.com/

It is useful in those situations where an air motor does not need to
be removed and repaired by the hot pearl glue method.

Paul Bellamy