I have an equalizer hitch to pull my camper. Because my new pick up is taller than the old one by several inches; I wanted to take the ball mount apart and readjust the heighth. I couldn't undo the bolts with a 1/2" breaker and a long pipe at all! So, over to a local equipment rental shop where I know the owner and his mechanic. Well, his air powered impact wrench wouldn't take the 1 1/16th aircraft nuts off, even after persuading with an air hammer. Break out the torch and heat them up - off they came. Now for the bolts which for some reason have an 1 1/8th head. The first one which goes through a slotted hole was removed with a lot of impact wrench. Remember all that's holding these two bolts in is rust. Now for the last hole, nothing would remove it. Not heat, not cussing. The last chance was a large press in the back room. He rigged it up on there and started. The bolted moved and as each thread entered the hole, the press made a loud bang, over and over. I thought for sure it was stripping threads. Nope, just rust.
I'm for sure going to do a thorough cleaning and install new bolts.