Because of the way they specifically operate, hydraulic truck cranes are different compared to other crane models. As opposed to using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. As oil is a fluid that retains its volume, it is incompressible. Therefore, 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 pressure generated by the hydraulic pump moves the piston. This particular action is maneuvered by the driver using the controls inside his cab. Usually, hydraulic truck cranes utilize a 2 gear pump.
The truck mounted crane is able to move from one site to another with little need for dismantling. 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 extend or retract because of hydraulics.
Jib: Jibs are latticed structure booms..
Boom Swing: The boom swing is a large ball or roller that is attached 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: 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 that flash so as to warn the driver that maximum weight is approaching.
Pump: The pump is the mechanism 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 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders which could be lowered and raised.
Rotex Gear: The rotex gear is situated under the cab and operated by hydraulics. It enables the boom to swivel on this gear.