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A hydraulic device is a device that uses liquids to transmit pressure equally from one point to another.

Hydraulic machines are machinery and tools that use liquid fluid power to do simple work. Heavy equipment is a common example.
In this type of machine, hydraulic fluid is transmitted throughout the machine to various hydraulic motors and hydraulic cylinders and becomes pressurised according to the resistance present. The fluid is controlled directly or automatically by control valves and distributed through hoses and tubes.

NOTE: Hydraulic machinery is operated by the use of hydraulics, where a liquid is the powering medium.

EFFECT OF AIR IN AN HYDRAULIC SYSTEM.
It is important that a hydraulic system contains no air bubbles. You may have heard about the need to “bleed the air out of the brake lines” of you car. If there is an air bubble in the system, then the force applied to the first piston gets used compressing the air in the bubble rather than moving the second piston, which has a big effect on the efficiency of the system.

EXAMPLES OF HYDRAULIC DEVICES.
Some examples of hydraulic devices include:
Backhoes,
Bulldozers,
Excavators,
Jaws of life,
Metal shears,
Car crushers,
Automobile brakes,
Garbage compactors,
Log splitters,
Zero radius lawn tractors,
Bobcat tractors.

The Penalty for Ignorance is Lack

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