I didn't get a chance to look in my manual, but it sounds like you did have a power beyond setup. Since you have the internal plug removed, I would think you wouldn't need the line that returns to the reservoir. If you're using double acting cylinders, those interlocks do need to be turned in until they seat. I'd check them, it's quite easy.

I'll be in West Lafayette, I'm sure we'll be able to find an 1800 to look at and discuss what's going on. Hope to see you there.