Due to the way they particularly work, hydraulic truck cranes are different from other crane types. Instead of using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. As oil is a kind of fluid which retains its volume, it is incompressible. Thus, this means it is among the most ideal kinds of fluids for pushing pistons towards the direction the force is going to be exerted.
The hydraulic pump generates a pressure which moves the piston. This particular action is maneuvered by the driver using the controls inside his cab. Typically, hydraulic truck cranes make use of a pump that has 2 gears.
Since the actual crane itself is mounted on a truck, it could travel many distances from job to job and there is little dismantling involved. The truck crane has one engine that controls both the crane and the truck.
Other Components
Boom Telescope: The boom telescope allows the boom to retract or extend thanks to hydraulics.
Jib: Jibs are latticed structure booms..
Boom Swing: The boom swing is a big roller or ball which is connected to the carrier. It could swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at varying speeds in order to rotate the turntable gearbox.
Outrigger: Outriggers are units that cranes will utilize to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: In order to alert the operator 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: The steel cables are reinforced and run through the boom and the jib. They can 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 operated by hydraulics and located beneath the cab. It allows the boom to swivel on this gear.