Due to the way they specifically work, hydraulic truck cranes are different compared to other crane models. Instead of using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Since oil is a fluid which retains its volume, it is incompressible. Therefore, this means it is among the most ideal kinds of fluids for pushing pistons towards the direction the force is going to be exerted.
The hydraulic pump creates a pressure which moves the piston. This particular action is maneuvered by the operator using the controls in his cab. Normally, hydraulic truck cranes make use of a 2 gear pump.
The truck mounted crane can move from one site to another with little need for dismantling. The truck crane has a single engine that can control 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: Boom swings have a large ball or roller attached to the carrier. It could swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at various speeds in order to rotate 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: The load movement indicator is lights that flash so as to alert the driver 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 crane's boom ascends utilizing double hydraulic cylinders which allow for lowering and raising materials.
Rotex Gear: The rotex gear is located under the cab and operated by hydraulics. It allows the boom to swivel on this gear.