With regard to Kevin Mayes' posting in yesterday's MMD about his
Wurlitzer 125 band organ that will play only one or two notes at a
time, it doesn't sound like a lack of vacuum if the snare drum is
playing well. Kevin doesn't say, but I wonder whether the vacuum
reservoir is collapsed as much as it has been in the past. That would
indicate whether the vacuum pumps are delivering or whether there is a
vacuum leak in the system.
As for a Wurlitzer service manual, Wurlitzer never made any, because
they expected you to come to them or use one of their route men for
service. The nearest thing to a service manual is something like Art
Reblitz's book on player piano servicing and rebuilding.