Hydraulic Consulting, Hydraulic Help, Hydraulic Blog, Hydraulic Help Blog, Bob Sheaf

Hydraulic Help Blog, Bob Sheaf, Hydraulic Training, Online Hydraulic Training,

When I teach hydraulic troubleshooting classes, I always ask my students, “If a cylinder does not move when I shift the directional valve, is it a pressure problem or a flow problem?”.


Most of the students will say it is a flow problem. Then I ask them, “But what if I don’t have enough pressure to move the load?”


If the actuator does not move, I always think to myself, “why don’t I have enough pressure to make it move?".  Something is taking my flow elsewhere at a lower pressure. Or, if it’s moving slower than it should I think, "Why don’t I have enough flow?  Where is part of my flow going where it shouldn’t?”.


In the circuit shown...

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