My Wurlitzer "C" has a single combination pump which supplies both
vacuum and pressure. It's somewhat smaller than an original pressure
pump and the violins seem to do okay, but the Doppleflutes? Forget it!

I've rebuilt the entire pipe chest and sealed it but the pump still
isn't doing it. The vacuum does great, being larger than an original,
but having the pressure bottom out or start to sag consistently just
drives me nuts. There's no real pressure reservoir, just a bag that
inflates and has a spill valve. There's no way it ever worked right.

In other words, I need an original vacuum and pressure pump setup.
There's got to be one out there somewhere. This same setup was also
used in several photoplayers made by Wurlitzer.

My machine has the correct motor and gear drive, but one undersized
pump just doesn't do it.

Thanks,

Mikey Mills
https://www.mechanicalmusic.org/ 
mwmillsmusic@gmail.com.geentroep [delete ".geentroep" to reply]