Because of the way they specifically work, hydraulic truck cranes are different compared to other crane types. Rather than utilizing a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Since oil is a fluid which 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 hydraulic pump generates a pressure that moves the piston. This action is maneuvered by the driver from the controls in his cab. Typically, hydraulic truck cranes utilize a 2 gear pump.
As the actual crane itself is mounted on a truck, it can travel many distances from site to site and there is little dismantling involved. The truck crane has a single engine which controls both the truck and the crane.
Other Components
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 ball or roller which is connected to the carrier. It can swing 360 degrees in both directions. Hydraulic mechanisms control the swing and provide swings at varying speeds in order to revolve the turntable gearbox.
Outrigger: The outrigger is a unit that helps the crane maintain its balance by utilizing hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash in order to warn 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 jib and the boom. They could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders which are capable of being raised and lowered.
Rotex Gear: The rotex gear is operated by hydraulics and located beneath the cab. It allows the boom to swivel on this gear.