Due to the way they particularly operate, hydraulic truck cranes are different from other crane types. Rather than using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. As oil is a kind of fluid that retains its volume, it is incompressible. Hence, this means it is amongst 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 that moves the piston. This particular action is maneuvered by the driver using the controls in his cab. Usually, hydraulic truck cranes use a pump which has 2 gears.
The truck mounted crane is able to move from one location to another with little need for dismantling. The truck crane has a single engine that controls both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope is due to a specific hydraulic operation that enables the boom to extend or retract.
Jib: Jibs are latticed structure booms..
Boom Swing: The boom swing is a large roller or ball which is attached to the carrier. It is able to 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 which cranes would use to maintain its balance. It utilizes hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash so as to alert 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 jib and the boom. They are able to 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 could be raised and lowered.
Rotex Gear: The rotex gear is operated by hydraulics and located under the cab. It allows the boom to swivel on this gear.