Hydraulic truck cranes are different compared to other crane types due to the way they particularly work. Hydraulic cranes use oil instead as opposed to using a winch in order to wind up cables to provide the lifting force. As oil is a type of fluid which retains its volume, it is incompressible. Hence, 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 operator from the controls inside his cab. Normally, hydraulic truck cranes make use of a 2 gear pump.
Since the actual crane itself is mounted on a truck, it could travel numerous distances from job to job and there is little dismantling involved. The truck crane has a single engine which can control both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope is due to a specific hydraulic operation that allows the boom to extend or retract.
Jib: Jibs are latticed structure booms..
Boom Swing: Boom swings have a large ball or roller attached to the carrier. It could swing 360 degrees in both directions. Hydraulic mechanisms 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 utilizes hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash in order to warn 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 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 are capable of being raised and lowered.
Rotex Gear: The rotex gear is operated by hydraulics and located under the cab. It enables the boom to swivel on this gear.