Hydraulic truck cranes are different compared to other crane types due to the way they specifically operate. Hydraulic cranes utilize oil rather than utilizing a winch in order to wind up cables to provide the lifting force. Because oil is a type of fluid which retains its volume, it is incompressible. Thus, this means it is one of the most ideal kinds 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 driver from the controls within his cab. Typically, hydraulic truck cranes utilize a 2 gear pump.
The truck mounted crane could move from one location to another with little need for dismantling. The truck crane has a single engine which can control both the truck and the crane.
Other Components
Boom Telescope: The boom telescope allows the boom to extend or retract because of hydraulics.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: The boom swing is a large ball or roller that is connected to the carrier. It can swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at various speeds 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's purpose is to steer the outrigger.
Steel Cables: The steel cables are reinforced and run through the jib and the boom. They can generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends utilizing double hydraulic cylinders which allow for raising and lowering supplies.
Rotex Gear: The rotex gear is operated by hydraulics and located beneath the cab. It enables the boom to swivel on this gear.