Due to the way they particularly work, hydraulic truck cranes are different from other crane models. Instead of using a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Because oil is a type of fluid that retains its volume, it is incompressible. Hence, this means it is among the most ideal kinds of fluids for pushing pistons towards the direction the force is going to be exerted.
The hydraulic pump creates a pressure that moves the piston. This action is maneuvered by the operator from the controls within his cab. Usually, hydraulic truck cranes use a pump which has 2 gears.
The truck mounted crane is able to move from one location to another with little need for dismantling. The truck crane has one engine which can 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: The jib is a latticed structure which extends from the boom.
Boom Swing: Boom swings have a large ball or roller attached to the carrier. It can swing 360 degrees in both directions. Hydraulic devices provide swings at varying speeds and control the swing in order to revolve 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 alert the operator that maximum weight is approaching, the load movement indicator's lights flash.
Pump: The pump is the mechanism responsible for steering the outrigger.
Steel Cables: The steel cables are reinforced and run through the jib and the boom. They are able to generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends with the use of double hydraulic cylinders that could be lowered and raised.
Rotex Gear: The rotex gear is situated underneath the cab and operated by hydraulics. It allows the boom to swivel on this gear.