Tractors of different models, makes and sizes are used for gardening. The simplest and smallest ones are used for home gardening, with tubeless tires specifically made to work on grass. These are very easy to change and can be done by any homeowner with a few tools, a car jack and a new tire in hand. Heavyweight tractors, such as those used on farms, require a bit more technique because they are heavier and bigger, but can be done by the owner as well, eliminating the need to call a service truck to change it.
Park your tractor on a solid level ground, such as a concrete floor, so it cannot slide forward or back. Place it in park and set the brake. Block the front and rear wheels by placing bricks wedged against the tires to prevent the tractor from rolling.
Place a large, heavy-duty jack under a support close to the flat tractor tire or under the metal frame. Refer to the tractor's manual if you are uncertain about where to position the crank. Crank the jack until the flat tire is lifted off the ground and rotates freely. Crank it even higher since the new tire will be fully air-pumped and larger than the flat one, thus requiring more space.
Remove the hubcap with a tire iron. For large tractors you may have to use some pressure to loosen it. Hold a lug nut inside the flat tire with a lug wrench and rotate it counterclockwise until it comes loose and slides off. Repeat this procedure to loosen all the lug nuts. There will be five or six lug nuts, each requiring plenty of pressure to remove. You can also place your foot on one side of the wrench and use your body weight to loosen each nut. Keep them aside so you can find them easily later. Remove the flat tire and place it aside.
Lift the new tire, align it with the wheel bolts and slide it in the metal cavity in the tractor. You may need someone to help you with this if the tire is large. Make sure the air nozzle of the new tire faces out.
Put the lug nuts back in their places and secure them firmly with a lug wrench. Make sure each lug nut is tight, otherwise your tire will not be secure and there will be danger of it coming loose.
Bring the new tire down to the ground by slowly lowering the jack. Remove the jack once the tire rests on the ground. Place the hubcap over the new tire. You will have to apply pressure with your hand so it sets securely in place. Remove the bricks you placed against the other wheels.