Since its a different project than the electric power steering I've got going on the same tractor, I decided to start another thread on the FEL I'm building for the GT18. Here's a few pics of what I've got done so far.
Went with the PF Engineering plans, got the loader subframe and towers built and mounted.
And here's how I'm mounting my hydraulic pump. It's a 4-8 GPM gear pump I got from Surplus Center. I originally had planned to remove the PTO
clutch and mount the pump up directly, unfortunately it would've stuck out the front of the grille, so I used the mule drive for the mowing deck instead. Here's a pic of how I modified it.
I made a mount for the pump, and got a 1/2" shaft pulley, had a 1/2" shaft made with an 1/8" keyway, bought a coupler for it, and a 38" A belt.
Here's how it came out once it's all mounted up. I made a 5/16" x 2" long curved slot in the mule drive and a bracket off one side that rides in the slot so you can tighten the belt.
I've got both the left and right loader arms built and am in the process of building all my hydraulic lines out of 3/8" hydraulic tubing. It's a slow process, a lot of bending, flaring, TIG welding the JIC ends on, a lot of trial and test fitting and tweaking so it might be awhile before I have some pics of that.