I had one come off this spring on a new to me boat and trailer, probably 3000 lbs.
When I hooked it to the truck it felt tight closing the coupler and I raised the trailer jack until it was starting to lift the back of the truck to be sure it was on good.
Went a good 50 miles which included launching and reloading the boat onto the trailer without a problem.
Hit a deep rut in the road on the way home and suddenly something did not seem right so I coasted to a stop.
Safety chains were strong enough and properly crossed so no damage done.
Re hooked it and tightened the nut figuring it was out of adjustment.
Pulled it apart when I got home and it turned out to be that whoever had installed the lower jaw did not engage the pivot lever into the coupler which was allowing the lower jaw to move back under a heavy load.
Something I will bend down and check on every new to me trailer from now on.
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Today's Featured Article - Restoration Story: 1929 McCormick-Deering 10-20 - by Randal Simmon. On July 4th 1998 my dad and I was sitting on the front porch when he said that he was going to sell his two 10-20's to a junk man. He said that the junk man was going to give him $500 for both of them but he hadn't received the money for them yet. So I went into the house and wrote him a check for $500 and bought them myself and said now they are mine. He had bought them about five years before thinking that he was going to restore them himself. After five years sitting in the barn, he changed h
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