If the pressure hose is capped, the other hose will continue to leak out fluid if (and really only if, the piston is bypassing and the door is going down on its own. The bottom half of the cylinder has no ram shaft going through it and because of this it is not equal displacement end to end. As the fluid leaks, the upper (ram side) gets more and more fluid in it, but the piston is moving down, making more room, because the ram shaft is also entering this space, the fluid will come out of the non pressure hose. To be an equal force two way cylinder, the cylinder needs to have a rod coming out of both ends. (there are those made to operate that way) The oil coming out will not be as much volume as might be expected, but it will come out as it settles. If the door stays put exactly where it rests when the support is removed, (it may sag a little, then stay exactly still, the cylinder is good. Jim
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Today's Featured Article - Identifying Tractor Noises - by Curtis Von Fange. Listening To Your Tractor : Part 3 - In this series we are continuing to learn the fine art of listening to our tractor in hopes of keeping it running longer. One particularly important facet is to hear and identify the particular noises that our
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