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Adjusting a Pulsating Mechanical Lawn Sprinkler Instructions
The multi-adjustment lawn pulsating sprinkler adjustments can be confusing, with a few tips, anyone can adjust one with ease. The sprinkler has two reverse rings adjustments, to limit the movement far right and far left. A flip down tab causes the sprinkler to reverse directions when it contacts one of the reverse rings. If the flip down tab is left in the upward position the sprinkler will not reverse, but continue in a circle. The watering pattern of the pulsating sprinkler can be adjusted from a small pie shape, to a complete circle. If the sprinkler has provision to lift the control tab out of the way, the sprinkle will water a complete circle, without reversing.
It has an spray adjustment screw (diffuser pin) in front of the spray nozzle to adjust for distance, and spray. The more you reduce the distance (turning screw clockwise), the greater the spray effect). Turning the screw anti-clockwise increases the distance, but reduces the spray effect.
1/ Turn the water off, connect the hose to the sprinkler, drive the sprinkler support peg into the lawn, where you want to water.
2/Mimic what happens, when the water is turned on, lift by hand, the center of the unit (nozzle) to it full height, this is what happens when there is water pressure
3/ The center lifted, rotate by hand, the spray nozzle to the extreme right, until it touches the control ring (reverse pin) which tells it when to switch back to the other direction.
Adjust this stop-ring. If it is a spring wire type, squeeze the slip ring and rotate it to the proper position. If it is a plastic type limit, just click it to the proper position.
4/ Lift, and swing the spray nozzle completely to the other direction, and repeat the same adjustment for this side.
5/ Turn the water on and see how far the water spray reaches. Turn off the water. If the water does not go as far as you would like, turn the distance/spray screw out (diffuser pin), counter-clockwise, which is located in front of the spray nozzle.
If the water goes too far, turn the distance/spray screw in a clockwise direction, or reduce the water flow at the tap.
6/ Turn the water back on and observe. Make any adjustment as needed.
7/ you may have to reposition the sprinkler in the lawn, to get the effect you want. In some cases, you may have to make an adjustment at the water tap, by reducing the water flow a bit.
About Mechanical Pulsating Sprinklers
The mechanical pulsating sprinkler is very efficient, even while operating on low water pressure, it delivers a great volume of water in a short period of time.
The water discharge is close to ground and not greatly affected by wind. The pulsating sprinkler nozzle has a large orifice, which allows large quantities to flow. The orifice is large enough to prevent it from becoming plugged.
Pulsating mechanical sprinklers are made from a number of different materials, such as brass, aluminum, zinc, stainless steel, and plastic.
Pulsating Mechanical Sprinkler Story
A sprinkler was connected to a garden hose, but end of the hose was disconnected at the tap, and left lying on the ground. A large black beetle crawled unnoticed into the disconnected hose. When the garden hose was reconnected to the water tap and turned on, the beetle was swept along with the water and plugged the nozzle orifice. It took a while to realize why no water was coming out at the sprinkler. The bugs leg sticking out of the orifice clued me in.
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