I currently only have one power steering pump on one motor and I wont to put an additional working pump on the second motor, incase one motor goes down. How do I go about this and do I need any special hardware?

I'm no expert but did hydraulics while in the Navy on jets ect. Seems like you will need a couple of "T" fittings in the presure lines of each pump leading to the slave cylnders. You will also need a one way check valve between the pump and the "T" fitting to prevent the presure being back fed into the second pump while in use. You will probly also need check valves in the return side lines to prevent the same and overflow of the reservoir. I would also think that the second pump would need to stay idle, no belt or drive until needed so if needed the belt would need to be installed. Both can't run at the same time. Just thinking out loud and my .02c Maybe that helps?

X 2 [IMO]