I have a long gravel drive way so the first order of bussness it to place the tractor with the valve stem up and remove the shreader valve or even the extention if you have one. then roll the tractor so the valve stem is down and the cloride is squirting out.
When the colride stops coming out remove the rim/wheel from the tractor.
back a pick up where the trailer hitch is over the tire near the bead. Set a jack in place (bottle jack/ high lift or other with a base) as close to the rim and bead as you can get it. Apply pressure with the jack till the bead breaks. then flip the tire and break the bead on the opsite side.
Now the hard work will start, with a crow bar best if you have two.
Pry the bead over the rim if your saving the tires. If not use a saws all and cut the bead and tire totaly thru.
To reinstall find a good clean area (I use the grarage approch.) lay the tire on the rim
Orient it for proper direction. With a supply of dollar store soap soap thre bead down real well. set one side ot the tire over the bead then with the crow bars start leavering The bead over the rim.
Helps to have a good rubber hammer to help slide the bead over the rim also.
Once you have one side installed inseart the tube make sure you have the valve stem angled properly and insert it thru the hole. Then stuff the tube inside the tire.
Here caution should be used.
You don't want any bad wrinkles in the tube. You can try to fiddle with tjhe tube to remove them or air the tube up to remove them. I use the air up method.
Remove the air then I install a valve stem tool so I do not lose the valve stem inside the rim.
Then soap the second side of the tire down with that dollar store soap.
REMEMBER THESE ARE OFF ROAD TIRES.
Start prying the bead over the lip of the rim. Use that rubber hammer on the bead a lot. becareful when prying you do not pinch the tube.
When finished air the tires up. I use 7 pounds as a starter poundage of air. Drive the tractor a bit and see how the tires sit. If they look to flat give them about 3 more pounds.
Most all mine work great at 7 pounds however.
Now you have did one jump on the second one.
Piece of cake with the crow bars rubber hammer and valve stem tools.
Al