I have a Meyer PA plow. The plow is loose, as it wobbles side to side slightly while driving in the up position. I tightened up the nut on the center pivoit bold sevral times. It is a locknut with a nylon insert. Since it kept coming loose, I figured that the locknut's nylon insert was shot. I put a new locknut on, and used locktite. After a day of plowing, it is loose again. I see other Meyer plows wobbling going down the road.<p>I am thinking that I may drill a hole in the bolt and use a castle nut(like on a front wheel bearing) on it with a cotter pin holding it in place.<p>Any suggestions, comments, tricks, tips???