Hydraulic truck cranes are different from other crane types due to the way they particularly work. Hydraulic cranes utilize oil rather than using a winch in order to wind up cables to provide the lifting force. Since oil is a kind 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 pressure created by the hydraulic pump moves the piston. This action is maneuvered by the operator using the controls inside his cab. Typically, hydraulic truck cranes make use of a pump that has 2 gears.
As the actual crane itself is mounted on a truck, it can travel numerous distances from site to site and there is little dismantling involved. The truck crane has a single engine that could control both the crane and the truck.
Other Components
Boom Telescope: The boom telescope enables the boom to retract or extend thanks to hydraulics.
Jib: The jib is a latticed structure which extends from the boom.
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 devices control the swing and provide swings at various speeds in order to revolve the turntable gearbox.
Outrigger: Outriggers are units which cranes will use to maintain its balance. It utilizes 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 is the device responsible for steering the outrigger.
Steel Cables: The steel cables are reinforced and run through the jib and the boom. They can generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends using double hydraulic cylinders which allow for raising and lowering materials.
Rotex Gear: The rotex gear is situated underneath the cab and operated by hydraulics. It allows the boom to swivel on this gear.