I need help ! I have a 1990 m 4030 su . I was bush hogging this weekend after about an hour my power steering stopped working then I noticed my loader which was up wouldn't work either. I checked hydro fluid it was low .. No obvious leak so I added fluid everything worked but I knew something had to be wrong because I had not added any fluid to the power steering resvouir. After running a few minutes hydro fluid started leaking from the overflow on the power steering resviour . I don't know how this power steering system works Im guessing its a bad seal in the hydro pump or somewhere allowing fluid to be forced into the power steering system. I don't really know where to start .. Its been less than a year since the hydraulic system has be serviced and everything worked great until Saturday.