Jack Weeks | GPM Hydraulic Consulting
HYDRAULICS
Pressure vs. Flow: Understanding the Difference “A pressure problem in a hydraulic system is rarely the pump. It is almost always another bad component in the system.”
As a hydraulic instructor and consultant, I have met thousands of people whose job consists, at least in part, of the maintenance and repair of hydraulic systems. The number of hydraulic troubleshooters I have come across, however, I can count on the fingers of one hand. For the most part, I have encountered a lot of excellent hydraulic parts changers. These are people who have worked on and around hydraulic systems for so long that they know changing a specific
In this schematic, a fixed-displacement hydraulic pump is represented by a circle, with a filled-in arrowhead indicating liquid output.
part typically corrects a certain problem. They may or may not know exactly why this is, but they know from experience that replacing this part fixes the problem.
Now I don’t mean this in a derogatory way. Someone with that level of experience is valuable, but it isn’t troubleshooting; it’s parts changing. It works fine whenever changing a part does in fact correct the issue. The trouble
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| January - February 2020 | 17
