So my aunt was mowing with our 455 and suddenly, out of nowhere, it just blows out all of its fluid and loses steering. All the O rings in the steering column and right side steering cylinder blew out. It never leaked before, but now the O rings are gushing fluid so bad it doesn't steer at all. How hard are they to fix? We got an X485 to replace it for now but we really need to get the 455 back up.