You are asking if a remote four port open center valve can work as a double acting and single acting valve. Yes, it can. The valve lever needs a third position called "float". It is found with the lever all the way forward or back depending on how it is mounted on your tractor. Float connects all four ports together. This means that there is no energy in the hydraulic system except the potential energy of an elevated load or compressed spring. It quickly disappears when the rod is fully retracted.
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Today's Featured Article - Tractor Profile: Farmall M - by Staff. H so that mountable implements were interchaneable. The Farmall M was most popular with large-acreage row-crop farmers. It was powered by either a high-compression gas engine or a distillate version with lower compression. Options included the Lift-All hydraulic system, a belt pulley, PTO, rubber tires, starter, lights and a swinging drawbar. It could be ordered in the high-crop, wide-front or tricycle configurations. The high-crop version was called a Model MV.
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