This was not my day! My 4000 3cyl Rowcrop decided to lose the front wheel today. It seems there was a problem with the front axle long before I bought it. By the looks of the dust cap that covers the wheel bearing, the left front wheel was being held on by a nail. After further investigating the threads on the adjusting nut and the spindle are striped, actually almost smooth from rubbing back and forth from years of neglect. I have only had this tractor about a year now and just now started making repairs on it. It sat about first 8 months I owned it and did not have any problems with it then(LOL). I could go on and on about it, but, just one more thing. The left front spindle housing has been welded. It must have had a rough life.