Please help: stuck trailer hitch.

Anybody have ideas for releasing a trailer hitch that's been where it is for probably a decade? I've tried everything I know, including massaging(assaulting) with a sledge hammer and attempting to pull it out with a chain and a tree.

Penetrating oil and let it set.

Another thing that works on rusted/frozen bolts is heating it with a torch, but that's a lot of metal to be heating.

Heat the exterior and then spray in a can of dust off held upside-down in to the back of the hitch. The idea is to expand the receiver and shrink the hitch.

If you have a rose bud torch it will make heating the receiver much easier.

After attempting heat/solvent/persuasion/bad words, I removed entire hitch, took it to a professional welding shop. I am sure they used a rosebud and a press to remove the hitch. PO had used a sledge hammer to install it into rusty receiver

Remove the pin, hook a tow strap to something heavy and get a running start?

In reply to Antihero:

Tried that, snapped the tow strap. Then I tried with a chain, truck just spun it's tires when I tried just taking up tension and rolling on the throttle. Then I decided to back up an let the truck roll down to jar it a bit hoping to jar it loose, no luck there either. This was also at a bit of a down hill incline so the truck's weight was working in my favor too (in theory at least).

And with that last post, I had an epiphany. Tried a couple more times just pulling it out with the chain/truck/tree. Then I decided to have my sister sit in ready to catch it with the brake while it was in neutral just acting as a counter weight. I hosed it down with WD40 and assaulted it with a BFH. Tried the back up and roll down tactic again, repeated twice, and then it finally popped out.

In reply to Chadeux:

Awesome! For future-reference, CRC's "Freeze Off" is the penetrating lube you want for a job like this. Part penetrating oil, part freeze spray.