Hi friends and experts,  I need your help with a problem I have
encountered while working on a Wurlitzer Mortuary Organ, which is
almost identical to the Reproduco in layout, including the piano
and organ combination.

The piano pneumatic stack, a late model "5" cast metal 4-unit valves,
seems to be okay, albeit fragile.  The problem is that the piano
pneumatic stack does not operate when the organ is in the "Play" mode.
The roll drive works and the organ plays but no piano or pneumatics.

If anyone has encountered this problem or knows this system, please
help.

Thanks in advance,
John McClure
Norcross, Georgia