Because of the way they specifically work, hydraulic truck cranes are different from other crane types. Rather than utilizing a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. Since oil is a fluid that retains its volume, it is incompressible. Thus, this means it is among 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 particular action is maneuvered by the operator utilizing the controls within his cab. Typically, hydraulic truck cranes use a 2 gear pump.
Because the actual crane itself is mounted on a truck, it could travel many distances from site to site 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 enables the boom to extend or retract thanks to hydraulics.
Jib: Jibs are latticed structure booms..
Boom Swing: The boom swing is a big roller or ball which is connected to the carrier. It is able to swing 360 degrees in both directions. Hydraulic devices provide swings at varying speeds and control the swing in order to rotate the turntable gearbox.
Outrigger: The outrigger is a unit which helps the crane maintain its balance by using hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights that flash so as to alert the operator that maximum weight is approaching.
Pump: The pump is the mechanism responsible for steering the outrigger.
Steel Cables: Steel reinforced cables run through the boom and the jib. They are able to generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends using double hydraulic cylinders which allow for raising and lowering supplies.
Rotex Gear: The rotex gear is situated beneath the cab and operated by hydraulics. It allows the boom to swivel on this gear.