I don't have a diagram, but I was just working on that stuff and all you will need down there is a 17mm or 11/16 wrench to disconnect the hose. You cannot turn it very much in one try as there isn't much room. The hose you want to remove also hooks onto a bracket on the frame in one place in between the rack and radiator.

The high pressure hose from the pump requires a 14mm or 9/16, so it's end is smaller.