It looks like in photo 2 there is the silver engine on the left, then a cone shaped mount for the hydraulic pump, which appears to be the same pump picture 5. I'm going to guess that the little hoses on top come from the treadle assembly. Picture 8 shows the other side of that pump.
I believe there are two more pumps out in front of this monster pump. They should be the main and aux PTO pumps.
So, they are using a different pump for drive circuit than mine.
Anyway, pretty cool layout.
Again, thanks for the pictures, PJ. /forums/images/graemlins/cool.gif