Due to the way they specifically work, hydraulic truck cranes are different compared to other crane models. Instead of utilizing a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. As oil is a fluid which retains its volume, it is incompressible. Thus, 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 creates a pressure that moves the piston. This action is maneuvered by the driver using the controls in his cab. Normally, hydraulic truck cranes utilize a 2 gear pump.
The truck mounted crane could move from one site to another with little need for dismantling. The truck crane has a single engine that controls both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope enables the boom to extend or retract because of hydraulics.
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 control the swing and provide swings at varying speeds in order to revolve 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 that flash in order to alert the driver that maximum weight is approaching.
Pump: The pump is the device responsible for steering the outrigger.
Steel Cables: Steel reinforced cables run through the jib and the boom. They could generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders that can be raised and lowered.
Rotex Gear: The rotex gear is operated by hydraulics and located underneath the cab. It enables the boom to swivel on this gear.