Hydraulic truck cranes are different from other crane models due to the way they particularly work. Hydraulic cranes use oil instead as opposed to using a winch in order to wind up cables to provide the lifting force. Since oil is a type of 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 pressure generated by the hydraulic pump moves the piston. This action is maneuvered by the operator from the controls in his cab. Usually, hydraulic truck cranes use a pump that has 2 gears.
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 crane and the truck.
Other Components
Boom Telescope: The boom telescope is due to a specific hydraulic operation which allows 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 mechanisms provide swings at varying 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: The load movement indicator is lights which flash in order to warn the operator that maximum weight is approaching.
Pump: The pump's purpose is to steer the outrigger.
Steel Cables: The steel cables are reinforced and run through the boom and the jib. They are able to generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders that can be lowered and raised.
Rotex Gear: The rotex gear is located under the cab and operated by hydraulics. It enables the boom to swivel on this gear.