Because of the way they specifically operate, hydraulic truck cranes are different compared to other crane types. Rather than using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Because oil is a fluid which retains its volume, it is incompressible. Therefore, this means it is amongst 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. Typically, hydraulic truck cranes make use of a pump which has 2 gears.
Because the actual crane itself is mounted on a truck, it is able to travel many distances from job to job and there is little dismantling involved. The truck crane has one engine which controls both the crane and the truck.
Other Components
Boom Telescope: The boom telescope is due to a specific hydraulic operation which allows the boom to retract or extend.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: The boom swing is a large roller or ball 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 revolve the turntable gearbox.
Outrigger: The outrigger is a unit which helps the crane maintain its balance by utilizing hydraulics to lift the truck.
Load Movement Indicator: In order to warn the driver that maximum weight is approaching, the load movement indicator's lights flash.
Pump: The pump is the mechanism responsible for steering the outrigger.
Steel Cables: Steel reinforced cables run through the jib and the boom. They can generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends utilizing double hydraulic cylinders which allow for lowering and raising materials.
Rotex Gear: The rotex gear is operated by hydraulics and situated underneath the cab. It enables the boom to swivel on this gear.