Because of the way they particularly operate, hydraulic truck cranes are different from other crane types. As opposed to using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. As oil is a fluid that retains its volume, it is incompressible. Thus, 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 hydraulic pump creates a pressure which moves the piston. This action is maneuvered by the operator from the controls inside his cab. Normally, hydraulic truck cranes make use of a pump that has 2 gears.
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 is due to a particular hydraulic operation which enables the boom to retract or extend.
Jib: Jibs are latticed structure booms..
Boom Swing: Boom swings have a large roller or ball connected to the carrier. It is able to 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: Outriggers are units which cranes will utilize to maintain its balance. It uses 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: Steel reinforced cables run through the jib and the boom. They are able to generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends using double hydraulic cylinders which allow for raising and lowering supplies.
Rotex Gear: The rotex gear is operated by hydraulics and situated under the cab. It enables the boom to swivel on this gear.