Anton can confirm but I'd assume the hydraulic nose steering is "passive" .. meaning it has no pump, just a master and slave cylinder and you move the master with a servo, the hydraulics are just used to transmit the force to the steerable part of the nose gear. Presumably this is attractive when you don't want to move the entire strut as we usually do with a servo or cables at the top of the strut.
Regarding turbine pumps, I've seen pressure measurements way above 40psi on manufacturer test stands (more like 80-90) with the gear pumps used for turbines. I think if you go look at the excellent tread on hydraulic landing gear you'll see a confirmation of this plus some really nice setups. See:
http://www.rcuniverse.com/forum/rc-j...-retracts.html
Dave