Due to the way they specifically operate, hydraulic truck cranes are different from other crane models. Instead of 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. Hence, 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 pressure generated by the hydraulic pump moves the piston. This action is maneuvered by the operator using the controls within his cab. Usually, hydraulic truck cranes utilize a pump that has 2 gears.
Since the actual crane itself is mounted on a truck, it is able to travel many distances from site to site and there is little dismantling involved. The truck crane has a single engine which can control both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope is due to a particular hydraulic operation which allows the boom to extend or retract.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: Boom swings have a large ball or roller attached to the carrier. It can swing 360 degrees in both directions. Hydraulic devices provide swings at varying speeds and control the swing in order to revolve 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: In order to warn the driver that maximum weight is approaching, the load movement indicator's lights flash.
Pump: The pump's purpose is to steer the outrigger.
Steel Cables: Steel reinforced cables run through the jib and the boom. They can generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The boom of the crane ascends utilizing double hydraulic cylinders which allow for raising and lowering supplies.
Rotex Gear: The rotex gear is operated by hydraulics and situated underneath the cab. It enables the boom to swivel on this gear.