Using the Greenlee 53390 rubber wheel is easy. First, make sure your 555SB quad speed bender is turned off. Then, carefully install the 12 - inch by 3 - inch rubber wheel onto the appropriate part of the bender. Once it's securely in place, you can turn on the bender and start your bending tasks. When using it, keep an eye on the bending process to ensure everything is going smoothly. As for maintenance, regularly clean the rubber wheel to remove any debris or dirt that might accumulate. Check for any signs of wear and tear, like cracks or excessive abrasion. If you notice any issues, it's a good idea to replace the wheel to keep your bender working at its best. Also, store the wheel in a cool, dry place when it's not in use to extend its lifespan.