Orbital Help

I know very little about orbitals but found a deal on this one but the numbers mean jack to me. How would this work with a full width axle?

I wouldn't run a closed center valve.

your steering pump will be at full pressure bypass any time you are not steering and it will burn up.

If you're NEEDING one, I think the best place to get them new is https://www.megamudtruckparts.com/ProductDetails.asp?ProductCode=HSV

tonybolton said:

If you're NEEDING one, I think the best place to get them new is https://www.megamudtruckparts.com/ProductDetails.asp?ProductCode=HSV

Click to expand...

I don't necessarily need one just don't love my assist.

You want open center. As for cu/in per rec, figure out the cubic inches in your cyl and then divide by the cu/in per revolution of steering wheel and get your turn lock to lock. will be different rod side to piston side on a single ended ram as the rod removes volume from that chamber.
pi X R^2 is square inches of piston then for cubic inches, X length of travel you use in steering (if you don't use all the ram)
So, 2x8" ram, 1x1x3.14 is 3.14 x 8 is 25ish cu/in. so a 9 cu/in orbital for example would be 25/9= 2.777 turns lock to lock.
Open center means the fluid is constantly running a loop from pump to pressure port, out return port back to tank. Closed center means the pressure dead heads and sits, when you turn it gives fluid to the ram, and the other side of the ram exhausts to the return or Tank hose