Pressure: Is the resistance to flow normally created by a load. This is expressed as Pounds per square inch or PSIFlow: This is the rate of which fluid flows through a system. This is expressed as Gallons per Minute or GPMDisplacement: This is the volume of fluid.
The 3 Most basic principles behind hydraulics are:1.) Liquids are incompressible2.) Liquids transmit pressure in all directions and with equal force at right angles to all surfaces3.) Liquids under pressure follow the path of least resistance
To turn your starter, electricity flows from the battery, through the ignition switch, and to the small terminals on the starter solenoid. This electricity causes an electromagnet inside the starter solenoid to connect the two heavy gauge wires and form a complete circuit. High amperage electric flow then goes through your starter, turning your engine’s flywheel.
This same principle can be applied if you wanted to build a rear fork lift, 3-point hitch, snow blade set up. Anything! Instead of using a hydraulic cylinder you can use a hydraulic motor and add a PTO shaft to power implements at any location you desire. You can also vary the motor speed by controlling the volume of oil that feeds it. All you need are the 4 basic hydraulic components of reservoir, pump, valve, and device.