This article explains how to adjust an Irritrol rotor head. A significant portion of lawn maintenance is making sure your sprinkler system is operating correctly. And one of the major components of sprinkler system maintenance is keeping your rotors properly adjusted. You want head-to-head coverage. And you want to minimize the amount of water hitting sidewalks, streets, or other hard surfaces.
This article will teach you the basics on how to adjust an Irritrol Rotor head, thereby keeping your lawn happy and your water wastage to a minimum.
Arc Adjustments: Turn The Irritrol Rotor Nozzle Turret To The “Right Start Position”
Place your finger on the top center of the rotor nozzle turret. Rotate the turret counterclockwise to the left stop to complete any interrupted rotation cycle. Rotate the nozzle turret clockwise to the “right start.” This is the fixed side of the arc. The nozzle turret must be held in this position for arc adjustments. The “right start” does not change.
Adjusting The Right (Fixed) Side Of The Arc
If the right side of the arc is not properly aligned, the sprinkler may spray in areas not intended for watering such as driveways or adjacent properties. The right side arc can easily be realigned.
OPTION 1:
Reposition the can on the fitting: Turn the sprinkler can and the fitting below it left or right to the desired position. This may require temporary removal of the soil around the sprinkler to allow you to grip the sprinkler can.
OPTION 2:
Remove internal riser assembly and reposition: Unscrew the top counter-clockwise and remove the internal riser assembly from the can. Once removed with the nozzle turret at its “right start,” reposition the riser assembly so that the nozzle arrow points to the desired start position. Replace the riser assembly back in the can and screw on the top. At this point, you have realigned the right arc stop, and you can adjust the left arc to an appropriate setting.
Adjusting The Left (Variable) Side Of The Arc
INCREASING THE ARC: Insert the plastic key end “D” of the universal tool into the arc set adjustment slot. While holding the nozzle turret at the “right start,” turn the universal tool clockwise. Each full 360° turn of the universal tool will increase the arc by 90°. Adjust to any arc between 40° and 360°. The universal tool will stop turning, or there will be a ratcheting noise when the maximum arc of 360° has been reached.
DECREASING THE ARC:
Insert the plastic key end “D” of the universal tool into the arc set adjustment slot. While holding the nozzle turret at the right start, turn the universal tool counterclockwise. Each full 360° turn of the universal tool will decrease the arc by 90°. Adjust to any arc between 40° and 360°. The universal tool will stop turning, or there will be a ratcheting noise when the minimum arc of 40° has been reached.
