Due to the way they specifically work, hydraulic truck cranes are different compared to other crane types. As opposed to using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. As oil is a type of fluid which 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 created by the hydraulic pump moves the piston. This particular action is maneuvered by the operator from the controls inside his cab. Usually, hydraulic truck cranes make use of a pump that has 2 gears.
The truck mounted crane can 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 Parts
Boom Telescope: The boom telescope is due to a particular hydraulic operation which allows the boom to retract or extend.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: Boom swings have a large ball or roller connected to the carrier. It is able to 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 which cranes would use to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: In order to warn 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 boom and the jib. They are able to generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders that could be raised and lowered.
Rotex Gear: The rotex gear is situated underneath the cab and operated by hydraulics. It allows the boom to swivel on this gear.