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

Hydraulics Explained

Hydraulics uses force applied at a particular location to move force to another area using an incompressible liquid like oil. Hydraulic systems are almost always created to increase force, so the amount of force applied to the final location is higher than the force needed to be generated start the operation. A common hydraulic use is in a car?s brake system. When you press the brake pedal, a pump moves liquid through the line, which squeezes the brake pads against the wheels of the car. Hydraulics are also often applied in lifting.

Hydraulic Crane Trucks

Crane trucks use the principle of hydraulics to lift and move a number of heavy loads. The trucks differvary in size and specialty. Some trucks are more suited for the heaviest lifting, others for projects requiring a great deal of height, and some even have all-terrain capabilities. The trucks are named according to the loads they are able to lift, for example, a 20 ton crane can lift 20 tons.

Boom

A boom is a telescoping arm that extends for a longer reach, or to move the pulley. A boom is often divided into sections and a hydraulic pump fills each section with fluid, causing the boom arm to become rigid. Fire ladder trucks, crane trucks, and some utility trucks have a boom arm. Some boom arms are long enough to need 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, often found underneath the cab, operates the crane from side to side. The rotex gear appears like a giant clock gear, and works in much the same way to move the crane from side to side efficiently.

Outriggers

Tires alone don’t provide the support needed to stabilize the crane truck. Without more support, the trucks would tip or simply be unable to function properly. Outriggers give the crane truck more/additional strength by extending several feet in both directions from the truck. Hydraulics are used in the outrigger system in addition, the whole truck is raised and all weight is shifted to the legs of the outriggers. Counterweights are also used to also balance the truck during the operation.

Now when you see a crane operating in the future, 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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