getting ready to buy a 58 case 200. the guy says the lift works sometimes then sometimes it dont. says it will go up but real slow about it sometimes. what would cause this problem? i plan on changeing the hydro filter, but other than that i dont know what to do. anyone have suggestions? the tractor comes with a set of plows and a 5' bushog for 1100.00 bucks. it runs good starts easy, gas motor, tires are all good. thanks