My American visible was stuck solid like yours. One mine, the pump was stuck where the shaft the handle attaches to goes into the pump body. Here's what I did to free it up - first, I heated the pump body right in the area where the shaft goes in as hot as I could get it, then sprayed with water to quench it and bust loose the rust. Second, I lubed the pump cylinder with vaseline to keep the piston moving smoothly in the bore. Third, I soaked the area around the shaft with Kroil on the inside and outside, attached the handle and very gradually worked the handle back and forth, increasing the distance a little at a time, and it eventually freed up. It's still a bit on the stiff side but I'll hit it with more Kroil and keep working on it. It's free though.