Hydraulic truck cranes are different compared to other crane models because of the way they specifically operate. Hydraulic cranes utilize oil instead as opposed to 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 amongst the most ideal types of fluids for pushing pistons towards the direction the force is going to be exerted.
The hydraulic pump creates a pressure which moves the piston. This action is maneuvered by the driver 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 controls both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope allows the boom to extend or retract because of hydraulics.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: Boom swings have a big ball or roller attached to the carrier. It is able to swing 360 degrees in both directions. Hydraulic mechanisms provide swings at various 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: In order to warn the operator that maximum weight is approaching, the load movement indicator's lights flash.
Pump: The pump is the mechanism responsible for steering the outrigger.
Steel Cables: The steel cables are reinforced and run through the boom and the jib. They can generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The boom of the crane ascends utilizing double hydraulic cylinders that allow for raising and lowering materials.
Rotex Gear: The rotex gear is operated by hydraulics and located underneath the cab. It enables the boom to swivel on this gear.