Terry Smythe <terry_smythe@MBnet.MB,CA> recently forwarded a message from
Phil Taylor <pmt@fwi.com> about restoring pump organs.

Suggest the following as a starting place ( it won't answer  everything,
but will get you started):

Gellerman, Robert F., "The American Reed Organ," (A Treatise on its
History, Restoration, and Tuning," Vestal, NY: The Vestal Press, fifth
printing, 1986; ISBN 0-911572-53-8.

I have a copy, but also have found it in large public library collections.

Bob Ebert