At a minimum you should remove them and repack them. Generally that is a once per year job, although you may be able to get away with longer (obviously). If you don’t do it in your driveway, you will be doing it on the side of the road at some point. The only time I ever lost a bearing it was shortly after I paid a shop to do the job because I was lazy and pressed for time. It is time and money well spent to do it as preventative maintenance. YouTube has info if you have never done it. Do not set them too tight, there should be some play. If you have a castle nut and have a choice between slightly too tight and slightly too loose, choose too loose. If you lose a bearing you will be lucky if you don’t also ruin the spindle on the axle, which would usually necessitate replacing the entire axle.
THIS !!!!!!
