I filled a trailer with some scrap metal to take to the junk yard. It was a heavy load. I drove it 12 miles to another farm to get more scrap. Then drove home. The next day I was taking the load to the junk yard and began driving down my roadway. Thats when the trailer came right off the ball. Luckily this was my own private roadway and the safety chains held it, so there was no damage except a few things that fell out the rear. The trailer seems to be heavy to the rear, and the load was obviously more heavy in the rear, but still, it was the proper size ball and it was latched down all the way with a bolt in the lever hole to lock it down.
I recently had to loosen that nut under the hitch because I could not get it on the ball. I re-tightened it to approximately the same 1/4" from the end of the threads. Nothing broke inside the hitch, it just popped off the ball. Why would this happen? Do those nuts need to be a specific tightness using a torque wrench? If so, how do I find out the proper method to tighten it? I dont want this to happen again. I was lucky this time since it happened off the highways. This really has me puzzled since it was driven 12 miles on the highway with the same load.
I should mention that I was backing it up to toss on one last piece of scrap, when it popped off the ball. (whether that matters or not).