Motor? Nah - hydraulic please!

So, if your system is compatible, you can likely steer it directly without a motor turning the steering wheel.

TODO: info on valve control

Forum member Baraki makes a great custom valve block that can autosteerify (definitely a real word!) an existing power-steering system, check that out here:

Hydraulic valve assemblies for Every tractor, for every type of hydraulic systemAgOpenGPS