Because of the way they particularly work, hydraulic truck cranes are different from other crane models. Rather than utilizing a winch in order to wind up cables to provide the lifting force, hydraulic cranes use oil instead. Because oil is a kind of fluid that retains its volume, it is incompressible. Hence, 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 pressure generated by the hydraulic pump moves the piston. This action is maneuvered by the operator using the controls within his cab. Typically, hydraulic truck cranes use a pump that has 2 gears.
The truck mounted crane could move from one site to another with little need for dismantling. The truck crane has one engine that could control both the crane and the truck.
Other Parts
Boom Telescope: The boom telescope is due to a specific hydraulic operation that allows the boom to extend or retract.
Jib: The jib is a latticed structure that extends from the boom.
Boom Swing: Boom swings have a large roller or ball attached to the carrier. It could swing 360 degrees in both directions. Hydraulic devices provide swings at various speeds and control the swing in order to revolve the turntable gearbox.
Outrigger: Outriggers are units which cranes would use to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights which flash so as to warn the operator that maximum weight is approaching.
Pump: The pump is the mechanism responsible for steering the outrigger.
Steel Cables: Steel reinforced cables run through the jib and the boom. They could generate up to 14,000 lbs. or 6350 kg.
Boom Elevation: The crane's boom ascends using double hydraulic cylinders that allow for raising and lowering supplies.
Rotex Gear: The rotex gear is operated by hydraulics and located underneath the cab. It enables the boom to swivel on this gear.