Hydraulic truck cranes are different from other crane types due to the way they specifically work. Hydraulic cranes use oil instead as opposed to using a winch in order to wind up cables to provide the lifting force. As oil is a fluid which retains its volume, it is incompressible. Thus, this means it is one of the most ideal types of fluids for pushing pistons towards the direction the force is going to be exerted.
The hydraulic pump generates a pressure which moves the piston. This action is maneuvered by the driver utilizing the controls within his cab. Typically, hydraulic truck cranes make use of a 2 gear pump.
As the actual crane itself is mounted on a truck, it could travel many distances from site to site and there is little dismantling involved. The truck crane has a single engine which controls both the crane and the truck.
Other Components
Boom Telescope: The boom telescope is due to a specific hydraulic operation which enables the boom to extend or retract.
Jib: Jibs are latticed structure booms..
Boom Swing: The boom swing is a big roller or ball that is connected 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 revolve the turntable gearbox.
Outrigger: Outriggers are units that cranes would use to maintain its balance. It utilizes hydraulics to lift the truck.
Load Movement Indicator: In order to alert the operator that maximum weight is approaching, the load movement indicator's lights flash.
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 crane's boom ascends utilizing double hydraulic cylinders which allow for lowering and raising supplies.
Rotex Gear: The rotex gear is located under the cab and operated by hydraulics. It allows the boom to swivel on this gear.