Wolff Construction Cranes Portland

Hydraulic truck cranes are different from other crane types due to the way they particularly operate. Hydraulic cranes use oil instead as opposed to utilizing 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. Therefore, this means it is one of the most ideal kinds 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 particular action is maneuvered by the operator from the controls within his cab. Normally, hydraulic truck cranes use a 2 gear pump.



Because the actual crane itself is mounted on a truck, it can travel many distances from job to job and there is little dismantling involved. The truck crane has a single engine which controls both the crane and the truck.



Other Parts

Boom Telescope: The boom telescope is due to a specific hydraulic operation that allows 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 ball or roller connected to the carrier. It can swing 360 degrees in both directions. Hydraulic mechanisms provide swings at various speeds and control the swing in order to revolve the turntable gearbox.



Outrigger: Outriggers are units which cranes will utilize to maintain its balance. It uses hydraulics to lift the truck.



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



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



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



Boom Elevation: The crane's boom ascends using double hydraulic cylinders which allow for raising and lowering materials.



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

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