Hydraulic truck cranes are different from other crane types due to the way they specifically work. Hydraulic cranes use oil rather than utilizing a winch in order to wind up cables to provide the lifting force. Since oil is a fluid that retains its volume, it is incompressible. Hence, this means it is one of the most ideal kinds of fluids for pushing pistons towards the direction the force is going to be exerted.
The hydraulic pump generates a pressure that moves the piston. This action is maneuvered by the driver from the controls in his cab. Normally, hydraulic truck cranes use a pump that has 2 gears.
The truck mounted crane could move from one location to another with little need for dismantling. The truck crane has a single engine which can control both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope is due to a specific hydraulic operation which enables the boom to retract or extend.
Jib: Jibs are latticed structure booms..
Boom Swing: The boom swing is a big roller or ball that is connected 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 which helps the crane maintain its balance by using hydraulics to lift the truck.
Load Movement Indicator: In order to warn the driver 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 can generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders which can be raised and lowered.
Rotex Gear: The rotex gear is operated by hydraulics and situated under the cab. It enables the boom to swivel on this gear.