Because of the way they particularly operate, hydraulic truck cranes are different compared to other crane types. Instead of using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. Because oil is a type of fluid that retains its volume, it is incompressible. Therefore, 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 pressure created by the hydraulic pump moves the piston. This particular action is maneuvered by the operator using the controls in his cab. Typically, hydraulic truck cranes utilize a 2 gear pump.
Because the actual crane itself is mounted on a truck, it could travel many distances from site to site and there is little dismantling involved. The truck crane has one engine which can control both the truck and the crane.
Other Components
Boom Telescope: The boom telescope allows the boom to extend or retract thanks to hydraulics.
Jib: Jibs are latticed structure booms..
Boom Swing: Boom swings have a large roller or ball connected to the carrier. It can swing 360 degrees in both directions. Hydraulic devices provide swings at various speeds and control the swing 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: In order to alert the operator 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 boom and the jib. They could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders which can be raised and lowered.
Rotex Gear: The rotex gear is situated under the cab and operated by hydraulics. It enables the boom to swivel on this gear.