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Cranes play an important role in modern society. Hydraulic cranes give power and mobility that is unparalleled.

Hydraulics Explained

Hydraulics uses force applied at a particular location to transfer force to another location using an incompressible liquid such as oil. Hydraulic systems are almost always designed to increase force, so the amount of force applied to the end location is higher than the force needed to be generated start the operation. A frequent hydraulic use is in a car?s brake system. When you lower the brake pedal, a pump moves fluid through the line, which squeezes the brake pads against the wheels of the car. Hydraulics are also often used in lifting.

Hydraulic Crane Trucks

Crane trucks use the idea of hydraulics to lift and move a many heavy loads. The trucks differvary in size and specialty. Some trucks are used the heaviest lifting, others for jobs requiring a great deal of height, and some even have all-terrain capabilities. The trucks are named according to the amount of weight they are able to lift, for example, a 20 ton crane is able to lift 20 tons.

Boom

A boom is an extending arm that extends for a longer reach, or to move the pulley. A boom is generally divided into sections and a hydraulic pump fills each section with fluid, which causes the boom arm to become firm. Fire ladder trucks, crane trucks, and some utility trucks have a boom arm. Some boom arms are long enough to require a jib, a latticework structure that adds support and length to the boom arm.

Rotex Gear

While the boom arm is responsible for raising and lowering the crane, the rotex gear, generally found underneath the cab, operates the crane from side to side. The rotex gear looks like a giant clock gear, and works in largely the same way to spin the crane from side to side efficiently.

Outriggers

Tires alone won’t offer the support needed to stabilize the crane truck. Without additional support, the trucks would tip or just be unable to perform. Outriggers give the crane truck more/additional strength by extending several feet in each direction from the truck. Hydraulics are used in the outrigger system as well, the whole truck is lifted and all weight is transferred to the legs of the outriggers. Counterweights are also used to also balance the truck during the lift.

Now when you see a crane operating on a project, you will have a better appreciation of the technology that make a crane work and how important they are to our cities and lifestyle.

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