Due to the way they specifically operate, hydraulic truck cranes are different compared to other crane models. As opposed to using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. Since oil is a type of fluid that 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 hydraulic pump generates a pressure which moves the piston. This action is maneuvered by the driver using the controls inside his cab. Normally, hydraulic truck cranes use a 2 gear pump.
The truck mounted crane is able to move from one location to another with little need for dismantling. The truck crane has one engine that controls both the crane and the truck.
Other Components
Boom Telescope: The boom telescope enables the boom to extend or retract because of hydraulics.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: Boom swings have a big ball or roller connected to the carrier. It is able to swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at varying speeds in order to revolve the turntable gearbox.
Outrigger: Outriggers are units which cranes would utilize to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: In order to alert the operator that maximum weight is approaching, the load movement indicator's lights flash.
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 14,000 lbs. or 6350 kg.
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 situated beneath the cab. It enables the boom to swivel on this gear.