This video will show you how to replace a wheel on this Troy-Bilt walk behind mower. Depending on your model, the instructions in this video may vary slightly. Always be sure to check your operator's manual for detailed instructions.
Make sure the engine is cool. Disconnect the spark plug ignition wire.
Put the height adjuster at the highest level.
Using a socket, unbolt the wheel and remove it from the mower.
Lubricate the new wheel's bushings with a dry lubricant like graphite.
Tighten the wheel nut and adjust the height of the wheel to match the other three.
Reconnect the spark plug ignition wire.