Heard a "pop" and hydraulic fluid is pouring out...help!

I am new to the forum and looking for some help. I have an '03 Gehl 4635 SXT skid steer. Today I was pushing on a mesquite tree attempting to break it off when I heard a deep pop come from somewhere under the seat. The motor still runs fine but I have lost all hydraulic drive and bucket power. I immediately shut the machine off and found hydraulic fluid pouring out from underneath the skid steer. Any ideas on what I broke and a rough estimate on cost to repair? Do I now have a 6,000 lb paperweight? I dont think it was a hose. Any help is appreciated.