Hydraulic truck cranes are different from other crane models because of the way they particularly operate. Hydraulic cranes utilize oil instead as opposed to using a winch in order to wind up cables to provide the lifting force. As 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 created by the hydraulic pump moves the piston. This action is maneuvered by the driver from the controls inside his cab. Usually, hydraulic truck cranes make use of a pump that has 2 gears.
Because 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 one engine that could control both the crane and the truck.
Other Parts
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 big roller or ball which is attached to the carrier. It could swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at various speeds in order to rotate 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: The load movement indicator is lights which flash in order to alert the driver that maximum weight is approaching.
Pump: The pump is the mechanism responsible for steering the outrigger.
Steel Cables: Steel reinforced cables 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 utilizing double hydraulic cylinders that allow for raising and lowering supplies.
Rotex Gear: The rotex gear is operated by hydraulics and located beneath the cab. It allows the boom to swivel on this gear.