After some more tinkering I was able to get power out of the dynamo.
Just an adjustment to the armature contact, some compressed air,
and I had nearly four volts. I've added a video. I loosened the
oiler cap, too. Now, just the pressure gauge, and the big one 'The
Heater' to go.
https://youtu.be/AVMqEjUvBEkI'm done,
Wayne