Hydraulic truck cranes are different from other crane models due to the way they specifically work. Hydraulic cranes utilize oil rather than utilizing a winch in order to wind up cables to provide the lifting force. As oil is a type of fluid which retains its volume, it is incompressible. Hence, this means it is one of 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 particular action is maneuvered by the operator from the controls inside his cab. Typically, hydraulic truck cranes make use of a 2 gear pump.
The truck mounted crane can move from one site to another with little need for dismantling. The truck crane has one engine that could control both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope enables the boom to extend or retract because of hydraulics.
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 connected to the carrier. It is able to swing 360 degrees in both directions. Hydraulic mechanisms control the swing and provide swings at various speeds 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 which flash so as to warn the driver 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 could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends utilizing double hydraulic cylinders that allow for lowering and raising materials.
Rotex Gear: The rotex gear is operated by hydraulics and located underneath the cab. It allows the boom to swivel on this gear.