Because of the way they specifically work, hydraulic truck cranes are different from other crane models. Instead of utilizing a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Because oil is a fluid that retains its volume, it is incompressible. Hence, this means it is amongst 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 action is maneuvered by the operator using the controls in his cab. Normally, hydraulic truck cranes make use of a 2 gear pump.
Because the actual crane itself is mounted on a truck, it is able to travel numerous 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 allows the boom to extend or retract.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: Boom swings have a large roller or ball attached to the carrier. It could swing 360 degrees in both directions. Hydraulic mechanisms provide swings at varying speeds and control the swing in order to rotate the turntable gearbox.
Outrigger: Outriggers are units that cranes would use to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash so as to warn the operator that maximum weight is approaching.
Pump: The pump is the device responsible for steering the outrigger.
Steel Cables: The steel cables are reinforced and run through the jib and the boom. They can generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders which are capable of being raised and lowered.
Rotex Gear: The rotex gear is situated beneath the cab and operated by hydraulics. It enables the boom to swivel on this gear.