On the hydraulic pressure, after the loader is unhooked from the tractor, (but hyd. lines still attached), turn off the tractor, then move the loader control in all four directions a couple times. This should release all pressure and make the couplers easy to remove.
Another tip, unhook the loader when it is warm (either from use, outside temp, sun, etc) and try to hook it up when it is cooler out. This will make everything much easier to hook up as the hydraulic fluid won't have built up pressure. I learned real quick about unhooking the loader and leaving it out in the sun. Came out middle of the afternoon to hook it up and had a bear of a time getting the couplers to mate up. The sun had heated up the hyd. hoses making the fluid expand and therefore building up pressure.
If you do have to hook it up in a situation like that, take a small bolt, dowel rod, etc and use it to push in on the poppet inside the coupler (the female/loader side). You might even have to take said dowel rod and hit it with a hammer or bang it down on something. Also, be sure to wrap the whole assembly with a rag when doing this as oil will squirt out.
Good luck with your new tractor, I sure like mine. :thumbsup: