Bobcat 743 runs good for ten minutes then squeals like a stuck pig

Hey guys. You guys helped me out before hope u can do it again. I bought a 743 has 2400 hrs. Decent machine. Runs great for ten minutes then it wont lift or tilt. And barely turns. Hydro oil overheating? Do these have oil coolers. If so where are they located. Im just hoping its not a bad hydro pump since it runs good at start up. I believe it is a 93 model. I Have seen some similar posts. And if it is the hydro pump is it a difficult job. Im mechanically inclined with cars but never worked...

Bobcat 743 runs good for ten minutes then squeals like a stuck pig

Bobcat 743 runs good for ten minutes then squeals like a stuck pig