Hydraulic truck cranes are different from other crane types because of the way they specifically work. Hydraulic cranes use oil rather than utilizing a winch in order to wind up cables to provide the lifting force. Since oil is a fluid which retains its volume, it is incompressible. Thus, this means it is among the most ideal types of fluids for pushing pistons towards the direction the force is going to be exerted.
The pressure generated by the hydraulic pump moves the piston. This action is maneuvered by the driver utilizing the controls in his cab. Normally, hydraulic truck cranes make use of a 2 gear pump.
As the actual crane itself is mounted on a truck, it can travel many distances from site to site and there is little dismantling involved. The truck crane has a single engine which can control both the crane and the truck.
Other Components
Boom Telescope: The boom telescope enables the boom to extend or retract thanks to hydraulics.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: The boom swing is a big ball or roller which is attached to the carrier. It can swing 360 degrees in both directions. Hydraulic mechanisms control the swing and provide swings at various speeds in order to rotate 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: In order to warn the operator that maximum weight is approaching, the load movement indicator's lights flash.
Pump: The pump's purpose is to steer the outrigger.
Steel Cables: The steel cables are reinforced and run through the jib and the boom. They could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders that could be raised and lowered.
Rotex Gear: The rotex gear is situated underneath the cab and operated by hydraulics. It enables the boom to swivel on this gear.