Hydraulic truck cranes are different from other crane types because of the way they specifically work. Hydraulic cranes utilize oil rather than using a winch in order to wind up cables to provide the lifting force. As oil is a fluid which retains its volume, it is incompressible. Hence, this means it is among the most ideal kinds of fluids for pushing pistons towards the direction the force is going to be exerted.
The pressure generated by the hydraulic pump moves the piston. This particular action is maneuvered by the driver from the controls within his cab. Usually, hydraulic truck cranes make use of a 2 gear pump.
Since the actual crane itself is mounted on a truck, it can travel numerous distances from job to job and there is little dismantling involved. The truck crane has one engine which can control both the crane and the truck.
Other Components
Boom Telescope: The boom telescope is due to a particular hydraulic operation which allows the boom to retract or extend.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: The boom swing is a big ball or roller that is attached to the carrier. It can swing 360 degrees in both directions. Hydraulic mechanisms provide swings at varying speeds and control the swing in order to revolve 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: Steel reinforced cables run through the boom and the jib. They could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The boom of the crane ascends using double hydraulic cylinders that allow for lowering and raising materials.
Rotex Gear: The rotex gear is located under the cab and operated by hydraulics. It enables the boom to swivel on this gear.