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RAIN BIRD

R-70

The R-70 is a piston driven, water lubricated sprinkler. The R-70 was designed to emulate, or mimic, our impact sprinklers. Impact sprinklers are considered to have the most efficient water distribution. The R-70 uses only 2% of the water passing through the unit to drive the head. This gives the R-70 a distinct troubleshooting advantage in that it is an excellent closed case dirty water rotor.

Arc Adjustment

To increase the arc - Keep in mind that the part circle R-70 is preset to approximately 180°. The left edge of the arc is fixed, marked by double ribs on the lower edge of the cover (refer to the drawing below). As the sprinkler is rotating to the right (clockwise), turn the adjustment screw to the adjust (ADJ) position using the thumbwheel. Allow the R-70 to rotate to the approximate desired setting, return the arc adjustment screw to the locked (LKD) position. The rotor will continue to rotate past this point 10-15°. The instant the rotor has started on its counter-clockwise rotation, turn the adjustment screw to the adjust (ADJ) position. When the R-70 has reached the desired arc, turn the adjustment screw to the locked (LKD) position. Always return the adjustment wheel to the locked (LKD) position.

To decrease the arc - As soon as the R-70 trips at the right edge (now turning counter-clockwise) turn the adjustment screw to the adjust (ADJ) position. When the rotor reaches its desired arc setting, turn the adjustment screw to the locked (LKD) position. Always return the adjustment wheel to the locked (LKD) position.

It is important that you return the arc adjustment screw to the locked position when you are finished. If not, the setting may change!

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