While we were getting ready to go camping for the weekend I pulled the hitch shank out and set it by the front of the trailer and noticed a small rust mark along one of the welds and upon closer look it looked like a crack, sure enough after cleaning it and inspecting it with a magnifying glass it was a crack although a small one. I cleaned off the rest of the shank and inspected it with the magnifying glass again and found other small cracks in the metal most near the welds. I plan on buying a new hitch and shank anyway in a few weeks as I dont know the age and previous history of this one that came with the trailer, so for saftey's sake and peace of mind I am replacing it and should have checked the whole hitch system earlier in the season but I did'nt but I am thankful I found this before hand and avoided a potential disaster waiting to happen. So the moral of the story is get out there and inspect every inch of your trailers hitch system and inspect it often for any potential problems before they happen. The life you save may be your own.
Also check
www.rvsafety.com
John