Foam markers are not so complicated. Just went through all this a couple years ago. I"d say the first thing to do is to check around as you should be able to put one together from other farmer"s broken foamers. My foamer uses a spotlite sprayer tank and water pump, as well as an air pump. (The water pump lets you use a non pressurized tank.) The water pump line has a regulator valve, my water pump has a pressure switch so it doesn"t run all the time. The air line has no restriction. The air line and water line run out to the end of the boom and are hooked together with a plastic t, the t is threaded into a 2" x 1ft plastic tube. The tube is stuffed full of plastic scruffies, (see the dish washing department). Use ag foam. Dishwasher soap doesn"t last long in hot weather. If you want to switch from side to side you would need valves to shut off the air and water to each side in turn. Mine has a solinoid valve which normally open to one port, when power is applied the second port opens, this directs the water. My foamer started life as a Landmark made by Smucker MFG. It sold for $650 new. I borrowed it from an unused set of sprayer booms. Had to replace the water pump right away. It works fine. Has had a lot of modificaitons at this point.
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Today's Featured Article - Hydraulic Basics - Part 2 - by Curtis Von Fange. In the last entry to this series we gave a brief overview of hydraulic system theory, its basic components and how it works. Now lets take a look at some general maintenance tips that will keep our system operating to its fullest potential. The two biggest enemies to a hydraulic system are dirt and water. Dirt can score the insides of cylinders, spool valves and pumps. Wate
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