What model tractor is it on? I have a 3414 industrial with the 3140 hoe. mine uses 2 hyd pumps. the swing and stabilizers run off one and the rest off the front one. you may have a weak pump or relief valve. go to a komatsu dealer and order shop manual GSS-1339,about $25. answers tons of questions. Some parts for it are tough to find. good luck!
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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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