ours run off of a power steering pump not found in an AD truck. With its lines, pump, and oil tank its seems kind of big for the space. Maybe there are unit out there that are smaller. On the ones here, space is a plenty, so it wasnt an issue.

Jeff
1947 Chevy 6400 2-ton
In the Gallery
1953 3/4-ton
In the Gallery
It was fun while it lasted