To adjust a gear driven rotor:
With the head under pressure, use either the provided adjustment tool or a small flat head screw driver to determine where the head stops rotating. Insert the tool in the space at the top of the head that has a plus and minus. Turn to plus or minus to increase the rotation or decrease the rotation. Depending on head type, if only one side is adjusting, grip the lower part of the rotor and twist the entire head to the desired water stream stopping point. Do not force the head as the gears may strip and a new rotor will be needed.