After several years of use, the tread on a snowblower's tires can wear down, diminishing grip on the ice and snow. Over a number of years, the rubber of the tires can dry out and becomes brittle, flaking away to expose the mesh underneath. If either of these situations occurs, it's time to change the tires. Contact Troy-Bilt to order replacement parts for your particular model.
A punctured tire will cause a snowblower to sit unevenly, affecting how snow is removed from the ground. To rectify the problem, remove the nut from the middle of the hub and place the damaged wheel flat on a work surface. Let any remaining air out of the tire and pry the rubber off the rim. Line up the valve of the replacement tire with the hole in the rim and snap the tire back in position. Pump the tire up to the pressure printed on the side.
Troy-Bilt recommends you apply lubricant to the wheels once a year. Failure to do so can cause the wheels to seize or become difficult to turn. Apply a little multipurpose automotive grease from your local hardware store to the axle, and replace the wheel. After a few turns to work in the lubricant, the wheels should turn smoothly and without resistance.
Snow and ice, not surprisingly, sometimes accumulate around a snowblower's wheels during use. Use a coarse brush to clear away any deposits affecting the movement of the snowblower while you work. Top up the tires with air as necessary to keep the blower level, and tighten the wheel nuts at the start of each season to ensure the wheels are secure.