Hydraulic truck cranes are different from other crane models because of the way they specifically operate. Hydraulic cranes use oil instead as opposed to utilizing a winch in order to wind up cables to provide the lifting force. As oil is a fluid that retains its volume, it is incompressible. Therefore, 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 particular action is maneuvered by the operator utilizing the controls in his cab. Usually, hydraulic truck cranes utilize a 2 gear pump.
Since 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 one engine that can control both the truck and the crane.
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: Boom swings have a big roller or ball attached to the carrier. It is able to 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: The outrigger is a unit that helps the crane maintain its balance by utilizing hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash in order to alert 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 are able to generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders that are capable of being raised and lowered.
Rotex Gear: The rotex gear is situated under the cab and operated by hydraulics. It enables the boom to swivel on this gear.