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 that retains its volume, it is incompressible. Hence, this means it is among the most ideal types 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 particular action is maneuvered by the operator from the controls within his cab. Usually, hydraulic truck cranes use a pump which has 2 gears.
Because the actual crane itself is mounted on a truck, it can travel numerous distances from site to site and there is little dismantling involved. The truck crane has a single engine which could control both the truck and the crane.
Other Parts
Boom Telescope: The boom telescope allows the boom to retract or extend because of hydraulics.
Jib: Jibs are latticed structure booms..
Boom Swing: Boom swings have a big ball or roller connected to the carrier. It could swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at varying speeds in order to revolve the turntable gearbox.
Outrigger: Outriggers are units which cranes will use to maintain its balance. It uses 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 is the device responsible for steering the outrigger.
Steel Cables: The steel cables are reinforced and run through the boom and the jib. They could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders which could be lowered and raised.
Rotex Gear: The rotex gear is operated by hydraulics and located underneath the cab. It enables the boom to swivel on this gear.