Due to the way they specifically work, hydraulic truck cranes are different compared to other crane models. Rather than using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. Because oil is a fluid which retains its volume, it is incompressible. Therefore, this means it is amongst 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 inside his cab. Normally, hydraulic truck cranes make use of a pump which has 2 gears.
The truck mounted crane is able to move from one location to another with little need for dismantling. The truck crane has a single engine that controls both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope allows the boom to retract or extend because of hydraulics.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: The boom swing is a big ball or roller which is attached to the carrier. It could swing 360 degrees in both directions. Hydraulic mechanisms control the swing and provide swings at various speeds in order to rotate the turntable gearbox.
Outrigger: Outriggers are units which cranes will use to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights that flash in order to warn the operator that maximum weight is approaching.
Pump: The pump's purpose is to steer the outrigger.
Steel Cables: Steel reinforced cables run through the boom and the jib. They could generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends using double hydraulic cylinders which allow for raising and lowering materials.
Rotex Gear: The rotex gear is located underneath the cab and operated by hydraulics. It allows the boom to swivel on this gear.