Stonehaller detailed exactly how to measure the hydraulic pressure of your system. You need to buy a pressure gage like
this one. You want a gage that goes to 5000 psi so that the range you are reading is in the middle of the gage (the most accurate part). Adapt it to a male quick disconnect the same size as your loader quick connects (3/8" I think).
With the engine off and the loader sitting on the ground, install the gage into either the curl or lift circuit. It doesn't matter which circuit or which fitting. Raise the engine rpm to about 2000 and then operate the joystick until pressure registers on the gage. It should be exactly 2500 psi for your tractor. Also, turn off the engine and wiggle the joystick to relieve pressure so you can remove the gage and reconnect the loader quick connect.
The relief valve pressure is regulated by shims in the relief valve. Especially while your tractor is under warranty, this is something you should ask your dealer to do. You do not want to make a mistake and overpressure the system.
The 250TL loader should lift 2000 lb up to 5' high at the lift arm pivots with no bucket. Since nobody works with no bucket, you'll have to deduct the weight of the bucket, so that puts you down to 1,650 lb. At the tip of the bucket, you'll have less lift that inside at the heel, but you also should have plenty of extra breakout force available if you curl the bucket at ground level. Since the cutting edge of the bucket is about 19" forward of the lift arm pivots, your straight lift is probably down to about 1,300 to 1,400 lb. Breakout curling force should be up around 2,500 lb or greater. That's why I said you should be able to manhandle an 1140 lb log. When I lift something heavy, I like to put the teeth of my bucket under the load and curl back so that the load center is closer to a vertical plane going through the lift arm pivots. You probably don't have a toothbar on your bucket and this makes it much harder to get under something and do a curl/lift. If you have forks on your loader, out at the tips of the forks, you'll find the lift is really anemic. Power drops off fast once you get out over 2 feet from the lift arm pivots.
Also, LarryD is correct that in my avatar, I am not stuck. I've attached some pictures of me cleaning out my pond and doing some serious work with my tractor. I love my little blue workhorse.
