Front wheel fell off my JD 400 while I was mowing away, out in the field, this morning, with no warning. I've lost the outer bearing, spacers, and retainers. Oh well. New ones tomorrow morning, according to parts at my dealer. Are the outer and inner bearings press fit, or can I just tape 'em into the seats? Reason I'm asking is to see whether I can get away with doing the fix right where it is, or whether I have to take the wheel assy to a shop. Old geezer here--can't remember from when I last did it.