Hydraulic truck cranes are different from other crane types due to 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. Since oil is a fluid which 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 hydraulic pump creates a pressure that moves the piston. This action is maneuvered by the driver using the controls in his cab. Normally, hydraulic truck cranes utilize a 2 gear pump.
As the actual crane itself is mounted on a truck, it is able to travel many distances from site to site and there is little dismantling involved. The truck crane has a single engine which controls both the truck and the crane.
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 that is connected to the carrier. It could 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 would use to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: In order to alert the driver that maximum weight is approaching, the load movement indicator's lights flash.
Pump: The pump is the device responsible for steering the outrigger.
Steel Cables: Steel reinforced cables run through the boom and the jib. They can generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends using double hydraulic cylinders that allow for raising and lowering materials.
Rotex Gear: The rotex gear is situated under the cab and operated by hydraulics. It allows the boom to swivel on this gear.