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Questions about hydraulics!

2009-03-22View Original

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Gear pump 75 L/min, 63/45 cylinder: Why does it overflow under no load? Replacing it with a 15 L/min gear pump restores normal operation. Does the directional control valve have a flow limitation? If it is due to the too-small diameter of the directional valve hole, does that mean the selection of the directional valve was a mistake?

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