Good day MMDers,  I'm looking for schematics, exploded-view diagrams,
or any dimensional information on a large 4-exhauster pump from an old
Welte.  It goes with a German Steinway upright.  I've got the upright
piano but the pump is missing, so I'm probably making one from scratch.
Any info would be helpful.

Thanks,
Skip Downing
Lebanon, New Hampshire