I went to use my bobcat after it sat all winter and upon startup the warning came on low hydraulic fluid.The machine would not move so i checked and no oil registered on the resorvoir dipstick. I added one gallon of oil just to get it to show on the dipstick.I took the plug out at the front of the machine and the oil shot out like a gusher.Its leaking into the chain case as there is no oil on the floor. Any suggestions on what is wrong and how hard of a repair is it. Thanks AL