Hmm. Dark pic.
Take a side shot.
There should be 2 bolts holding the bearing housing. But I'm just guessing.
There's no slot in the bottom to drop the axle.
I can see the pitting is bad on the axle. Major rust issues.
Your gonna have beat it apart. Acetylene torches for heat. Propane or MAPP isn't gonna get hot enough. And a BFH.