Refer to Jan 14, 2020 for the first pin to crank assembly.
Recently I had a second pin machined for the second landing gear crank. I was able to use natural cooling to reduce the size of the pin back in 2020. I hadn't gotten around to getting the second pin machined until recently and it's not so cold outside. Last week I tried fitting the pin in place by only heating the crank with the pin chilled to the outside temp of around 0 degrees C. The pin dropped in about a 1/16" before it got stuck. I was able to use a punch and drive it out. It certainly confirmed that I'd need to chill the pin to get it to fit in.
So today I got a few pounds of dry ice and got the pin nice and cold (and small).
I also heated the crank with the propane torch. Between heating the crank with the hole and cooling the pin, the temperature difference was ideal for the pin to drop right in.
Just for giggles I got an infrared thermometer to measure the temperatures. I got the crank close to 200 degrees C. The lowest temp the thermometer would read was -40 degrees C. Because of the dry ice, the pin was obviously much colder than that.