Because of the way they particularly operate, hydraulic truck cranes are different compared to other crane types. Rather than utilizing a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. 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 which moves the piston. This action is maneuvered by the operator from the controls inside his cab. Typically, hydraulic truck cranes make use of a pump which 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 which controls both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope enables 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 roller or ball connected to the carrier. It could swing 360 degrees in both directions. Hydraulic mechanisms control the swing and provide swings at various speeds in order to revolve the turntable gearbox.
Outrigger: Outriggers are units which cranes would utilize to maintain its balance. It utilizes hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash in order to warn the operator that maximum weight is approaching.
Pump: The pump's purpose is to steer the outrigger.
Steel Cables: The steel cables are reinforced and run through the boom and the jib. They could 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 supplies.
Rotex Gear: The rotex gear is located under the cab and operated by hydraulics. It allows the boom to swivel on this gear.