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First off, working with hydraulics can be extremely dangerous. With pressures up to 2500 PSI or more, if something is connected incorrectly serious injury or death could occur. Hydraulic systems should only be serviced and/or created by persons with the correct training and experience.

Before you can start any building, you will have to decide exactly what you want your hydraulic arm to do. How many limbs will it have? How much weight will it move? A background in basic statics is desirable as you will need to calculate the optimum point on the arm to connect the hydraulic cylinders to to obtain the maximum amount of force from the lever.

The basic components that make up a hydraulic system are as follows:

-Hydraulic pump (powered by a rotating engine or motor of come kind)

-Hydraulic cylinders (this is where your power and motion actually come from)

-Hydraulic valves (connected to levers or solenoids to control the flow of hydraulic fluid)

-Hydraulic fluid (automatic Transmission Fluid is very similar and would also work)

-Hydraulic fluid reservoir tank (to store fluid that is not currently being used in expanded cylinders)

-Hydraulic hoses and fittings to connect everything together

And of course the steel or other material for the limbs of the arm itself. Other objects like a pressure gauge or safety valve would be good ideas as well.

When selecting these components you need to make sure that

-your motor or engine has enough power to run your hydraulic pump

-your hydraulic pump has enough power to run your cylinders

-your cylinders can produce enough force to accomplish what you need them to accomplish

-and that your hoses and valves can handle the amount of pressure your system will be under

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16y ago

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