Bob, I got that far, just don't know without taking the thing apart, what is involved.
I got an idea, probably just a bunch of dc valves, a electric motor for emergency operation. But it works just fine after you jump it. Rather not rip into it, without a schematic, they would sure make it easier.
I'd also imagine that most of them are probably, somewhat alike in the controls, so maybe if I can find any schematic, I can probably work off it.
The other problem lies finding which valve is what. Never took one apart before.
But OJT sounds like the order of the day...