Due to the way they specifically work, hydraulic truck cranes are different compared to other crane types. As opposed to using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Since oil is a fluid that retains its volume, it is incompressible. Thus, 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 hydraulic pump generates a pressure which moves the piston. This action is maneuvered by the driver from the controls within his cab. Typically, hydraulic truck cranes use a pump that has 2 gears.
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 one engine that controls both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope is due to a particular hydraulic operation which allows the boom to extend or retract.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: Boom swings have a large ball or roller connected to the carrier. It is able to 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 which helps the crane maintain its balance by using hydraulics to lift the truck.
Load Movement Indicator: In order to alert the driver that maximum weight is approaching, the load movement indicator's lights flash.
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 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends using double hydraulic cylinders which allow for lowering and raising supplies.
Rotex Gear: The rotex gear is operated by hydraulics and situated underneath the cab. It enables the boom to swivel on this gear.