Hitachi EX60urg: Two sided pump?

I just got this nice little machine at an auction. They could not drive it through, so I think I bought it right. The engine runs well, but only half of the hydraulics work. It looks like it has two sides on the main pump. I'm getting ready to take the pump off and try my hand at fixing it.
Is anyone out there familiar with this machine?
Is there a John Deer that is similar?
None of the dealers have a book for the Hitachi (Grey Market).