Commercial Rotors - I-40 Rotor Adjustment Instructions

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The I-40 rotor has an optional opposing nozzle, indicated by the model number ending in -ON. The adjustment instructions for the opposing nozzle model are listed separately from the non-opposing nozzle model. 

I-40 Rotor Adjustment Sockets
  1. Arc adjustment socket
  2. Nozzle-retainer / range-adjustment screw
  3. Lift up socket
  4. Indicates VStat™ self-adjusting stator
  5. Specific model
Arc Adjustment (Non-Opposing Nozzle Model)

All I-40 group adjustable heads are preset to approximately 180°. The I-40 can be adjusted from 50-360 degrees. Sprinklers may be adjusted with water on or off. It is recommended that initial adjustment be made before installation.

  1. Using the palm of your hand, rotate the nozzle turret counter- clockwise to left stop to complete any interrupted rotation cycle (Fig. 1).
  2. Rotate the nozzle turret clockwise to right stop. This is the fixed side of the arc. The nozzle turret must be held in this position for all arc adjustments.

 

To Increase Arc

  1. Insert the key end of the Hunter wrench into the adjustment socket.
  2. While holding the nozzle turret at the right stop, turn the wrench clockwise. Each 360° turn of the wrench increases the arc 45°.
  3. Adjust to any arc between 50° and 360°.
  4. Wrench will stop turning, or there will be a ratcheting noise, when the maximum arc (360°) is reached.
  5. When set to 360°, the sprinkler will rotate continually counterclockwise. 
To Decrease Arc
  1. Insert the key end of the Hunter wrench into the adjustment socket.
  2. While holding the nozzle turret at the right stop, turn the wrench counterclockwise. Each 360° turn of the wrench decreases the arc 45°.
  3. Adjust to any arc between 50° and 360°.
  4. Wrench will stop turning, or there will be a ratc
Arc Adjustment (Opposing Nozzle Models)

All I-40-ON models are 360° ONLY. There is no arc adjustment. For less than 360° use I-40-ADS. 

Radius Adjustment

Insert the hex end of the Hunter wrench into the nozzle-retainer / range-adjustment screw. Turn the screw clockwise into the stream of water to decrease the radius, or counterclockwise to increase the radius.

Precipitation Rate Adjustment
Where excessively wet or dry areas are a problem, the precipitation rate may be adjusted. Simply replace the existing nozzle with a larger one to increase or a smaller one to decrease the rate of precipitation.
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