It depends on if they are loaded with fluid and / or have weights on them. I suspect that they are a 14.9x24 tire. I can remove the 14.9x24 tire that does not have weights or fluid on my 20C by myself. No crane needed.[/QUOTE
Agree with Sportsman.
If uncertain if the tires are filled with a liquid to add weight, get the valve at or near the bottom of the wheel and depress the inside of the tire valve. If liquid comes out then you will have a heavy assembly to deal with. Rather than lifting the tire and wheel, I have had success in jacking the tractor just enough to take the weight off the wheel studs and wheel center and then gently wiggling the wheel out off the studs. Keep the wheel as upright as you can but be prepared to get out of the way should you loose control of it. Keep perhaps 3 wheel nuts on and backed off so you can judge when the weight of the tractor is no longer on the center of the wheel and the wheel studs. Then remove the remaining nuts and do the wiggling.
Get the upright wheel and tire against a wall at a small angle so it stays standing. Block it so it cannot roll and keep people away from it.
The difficulty with your engine hoist is that its legs must be going underneath the tractor to support the hoist and this can be a problem in some circumstances as it interferes with the blocking of the tractor after jacking it.
Dave
M7040