Because of the way they specifically operate, hydraulic truck cranes are different from other crane types. Rather than using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Since oil is a kind of fluid that retains its volume, it is incompressible. Hence, this means it is among the most ideal types 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 action is maneuvered by the driver using the controls within his cab. Usually, hydraulic truck cranes use a 2 gear pump.
The truck mounted crane can move from one location to another with little need for dismantling. The truck crane has a single engine which can control both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope allows 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 large roller or ball attached to the carrier. It could swing 360 degrees in both directions. Hydraulic devices provide swings at various speeds and control the swing in order to rotate the turntable gearbox.
Outrigger: Outriggers are units which cranes will utilize 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's purpose is to steer 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 utilizing double hydraulic cylinders which allow for lowering and raising supplies.
Rotex Gear: The rotex gear is operated by hydraulics and situated under the cab. It allows the boom to swivel on this gear.