The return to upper reservoir should be below the level of lowest activity if possible as this reduces air entrainment/foaming. A hydraulic specialist from IH medium duty truck division stated "All system filtration should be just at the suction input of the pump with an easily changed filter with high flow. He said preventing all filterable particles from being introduced into the active components was a primary objective of preventing system contamination. He also indicated that a screen in the high pressure output with proper flow would stop failed pump parts from contaminating down stream valving and regulators. A reservoir should not have an outlet to suction or other reservoirs from its bottom. Allowing sediments and particles to settle out with less chance of being induced into the flow was his rationale. I have found his advice to be operational, and reciently worked on a design for a hydraulic company, through graduate students sfforts, using these principles. We designed a check valve testing station with multiple analysis of the performance of the valve. 100% post6 production testing. We fabricated the reservoirs and built the rack systems and mounts for multiple parallel filtration (.5 micron). I hope this helps, Jim
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Today's Featured Article - When Push Comes to Shove - by Dave Patterson. When I was a “kid” (still am to a deree) about two I guess, my parents couldn’t find me one day. They were horrified (we lived by the railroad), my mother thought the worst: "He’s been run over by a train, he’s gone forever!" Where did they find me? Perched up on the seat of the tractor. I’d probably plowed about 3000 acres (in my head anyway) by the time they found me. This is where my love for tractors started and has only gotten worse in my tender 50 yrs on this “green planet”. I’m par
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