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2018 Skyjack SJ1056 Image
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Make: Skyjack
Model: SJ1056
Year: 2018
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Stock Number: 600017
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Model: CTT 121A-5 TS16
Year: 2015
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2007 Potain HDT80 Image
Stock Number: 600194
Make: Potain
Model: HDT80
Year: 2007
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Stock Number: EQU010604
Make: Hyundai
Model: 110D-7E
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Stock Number: 231276
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Model: Big Blue 400D
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Wolff Construction Cranes

Wolff Construction Cranes

Hydraulic truck cranes are different from other crane types because of the way they specifically operate. Hydraulic cranes use oil rather than using a winch in order to wind up cables to provide the lifting force. Since oil is a fluid which retains its volume, it is incompressible. Hence, this means it is amongst the most ideal types of fluids for pushing pistons towards the direction the force is going to be exerted.

The pressure created by the hydraulic pump moves the piston. This action is maneuvered by the operator from the controls in his cab. Normally, hydraulic truck cranes use a pump that has 2 gears.

As the actual crane itself is mounted on a truck, it is able to travel many distances from job to job and there is little dismantling involved. The truck crane has one engine that could control both the crane and the truck.

Other Components
Boom Telescope: The boom telescope is due to a particular hydraulic operation that enables the boom to retract or extend.

Jib: The jib is a latticed structure which extends from the boom.

Boom Swing: Boom swings have a big roller or ball connected to the carrier. It could swing 360 degrees in both directions. Hydraulic mechanisms provide swings at varying speeds and control the swing in order to rotate the turntable gearbox.

Outrigger: The outrigger is a unit that helps the crane maintain its balance by using hydraulics to lift the truck.

Load Movement Indicator: The load movement indicator is lights that flash in order to alert the operator that maximum weight is approaching.

Pump: The pump's purpose is to steer the outrigger.

Steel Cables: The steel cables are reinforced and run through the boom and the jib. They can generate up to 14,000 lbs. or 6350 kg.

Boom Elevation: The boom of the crane ascends utilizing double hydraulic cylinders which allow for raising and lowering materials.

Rotex Gear: The rotex gear is operated by hydraulics and located under the cab. It allows the boom to swivel on this gear.

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