Hydraulic truck cranes are different from other crane types because of 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. Because oil is a fluid that retains its volume, it is incompressible. Thus, this means it is amongst the most ideal kinds 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 particular action is maneuvered by the driver using the controls in his cab. Usually, hydraulic truck cranes use 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 which controls both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope allows the boom to extend or retract thanks to hydraulics.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: Boom swings have a large roller or ball 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: Outriggers are units which cranes will use to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash in order to alert 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 boom and the jib. They are able to generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders which could be raised and lowered.
Rotex Gear: The rotex gear is located under the cab and operated by hydraulics. It allows the boom to swivel on this gear.