Using the Joeblow Sport III Floor Pump is easy. First, connect the TwinHead DX pump head to your tire valve. Make sure it's firmly attached. Then, start pumping with the ergonomic padded handle. The enlarged 3 - inch gauge will show you the tire pressure clearly. When you reach the right pressure, disconnect the pump head gently. As for maintenance, keep the pump in a dry place. After each use, check the pump head for any dirt or debris and clean it if necessary. Also, make sure the steel barrel and base don't get scratched or dented. If you notice any problems, don't try to fix it yourself but contact the manufacturer for help.