basic hydraulic info

[EricD]

I recently came across this "basics" information in another club I belong to. In any troubleshooting situation, no matter how simple or complex the hydraulic system, always start with the basics. This ensures that the obvious is never overlooked. In order for the 'obvious' to be obvious, the fundamental laws of hydraulics must be kept in mind: * Hydraulic pumps create flow - not pressure. * Resistance to flow creates pressure. * Flow determines actuator speed. * Pressure determines actuator force. * Fluid under pressure takes the path of least resistance. * When fluid moves from an area of high pressure to an area of low pressure (pressure drop) without performing useful work, heat is generated.

[BrownA]

Another club, hmmmmmmm ?

[HubbardRA]

The very basics. Much more can be written.

[msiebern]

Thanks for the simple post. We sometimes want to make things more complicated than they really are. All the formulas in world do us no good unless we understand the basic principles.

[D-17_Dave]

quote:

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Originally posted by EricD * When fluid moves from an area of high pressure to an area of low pressure (pressure drop) without performing useful work, heat is generated.

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The fact is any time oil goes from hi to low presure doing work or not it releases the heat placed into the oil by the power suplied. The diff. is as the work is done and the heat released, the continued flow keeps the oil and components from overheating. If the oil goes over a relief valve, it concentrates the heat into one area and creates trmendous heat. These are the very basics but they are appreciated.

[sandyhillbill]

this is the reason for the oil coolers on our little tractors.