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Adjusting A Rain Bird Rotor Headย 

In this article we will discuss the basics on how to adjust a Rain Bird Rotor, so your lawn will be happy and you’ll avoid wasting water.

Proper lawn maintenance requires a sprinkler system in tip-top condition. And a primary component of sprinkler system maintenance is keeping your rotors adjusted. Your rotors should be delivering head-to-head coverage. And also minimize the amount of water hitting sidewalks, streets or other hard surfaces.

Arc Adjustments for Rain Bird Rotors

Rainbird Rotor Top 350


Rain Bird Rotor Adjustment Diagram

Align Fixed LEFT Edge:

  1. Pull up turret and turn to the left trip point (counterclockwise). CAUTION: If while adjusting the rotor, it does not turn easily to the left, first turn it right (clockwise) to the right trip point.
  2. Rotate entire case to the desired fixed left position, OR unscrew cap and pull out assembly. Rotate internals to re-align left trip point to the desired adjustment point and re-install.

To Increase Or Decrease The Arc:

Rainbird Arc Adjustment 350

  1. While holding the nozzle turret at the fixed LEFT stop, insert tool or screwdriver into the adjustment socket.
  2. Next, adjust the arc with a screwdriver:
    1. Turn the screwdriver clockwise, (+) to INCREASE arc.
    2. Turn the screwdriver counterclockwise, (-) to DECREASE arc.
  3. Each full clockwise turn of the screwdriver will add or remove 90 degrees of arc.
  4. When the maximum arc of 360 degrees or minimum arc of 40 degrees has been set, you will hear a ratcheting noise. Do not adjust the rotor beyond the maximum or minimum arc.

Rotor Radius Adjustment:

Rainbird Radius Adjustment 350

  1. Insert a screwdriver into the radius adjustment socket of the rotor.
  2. Turn the screwdriver clockwise to reduce radius, and counterclockwise to increase the radius.