Hydraulic truck cranes are different from other crane types due to the way they particularly operate. Hydraulic cranes use oil rather than using a winch in order to wind up cables to provide the lifting force. As oil is a type of fluid which retains its volume, it is incompressible. Hence, 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 hydraulic pump creates a pressure which moves the piston. This action is maneuvered by the driver using the controls in his cab. Typically, hydraulic truck cranes use a pump that has 2 gears.
The truck mounted crane is able to move from one site to another with little need for dismantling. The truck crane has one engine that could control both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope is due to a particular hydraulic operation which enables the boom to retract or extend.
Jib: Jibs are latticed structure booms..
Boom Swing: Boom swings have a big ball or roller attached to the carrier. It is able to swing 360 degrees in both directions. Hydraulic devices provide swings at varying speeds and control the swing in order to rotate the turntable gearbox.
Outrigger: The outrigger is a unit that helps the crane maintain its balance by utilizing hydraulics to lift the truck.
Load Movement Indicator: In order to alert the driver 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: The steel cables are reinforced and run through the jib and the boom. They could generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders which can be raised and lowered.
Rotex Gear: The rotex gear is situated beneath the cab and operated by hydraulics. It enables the boom to swivel on this gear.