I am thinking about bidding on a 6' Bush Hog SQ840 that is up for Auction. I went to look at it today and it appears that the input shaft needs new bearings and a seal. I have never replaced those on a gearbox before. How difficult is replacing the bearings and seal on an Input shaft? If it is a PIA then I don't want to fool with it. But I have a feeling I can get the cutter for a decent price.