Due to the way they specifically operate, 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 fluid which retains its volume, it is incompressible. Hence, this means it is amongst the most ideal types 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 particular action is maneuvered by the driver using the controls within his cab. Typically, hydraulic truck cranes make use of a 2 gear pump.
The truck mounted crane could move from one location to another with little need for dismantling. The truck crane has a single engine which controls both the truck and the crane.
Other Components
Boom Telescope: The boom telescope is due to a specific hydraulic operation which enables the boom to retract or extend.
Jib: The jib is a latticed structure which extends from the boom.
Boom Swing: The boom swing is a big roller or ball which is attached to the carrier. It is able to swing 360 degrees in both directions. Hydraulic devices control the swing and provide swings at various speeds in order to revolve the turntable gearbox.
Outrigger: The outrigger is a unit which helps the crane maintain its balance by utilizing hydraulics to lift the truck.
Load Movement Indicator: In order to warn 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: Steel reinforced cables run through the jib and the boom. They could generate up to 6350 kg or 14,000 lbs.
Boom Elevation: The boom of the crane ascends with the use of double hydraulic cylinders which could be raised and lowered.
Rotex Gear: The rotex gear is situated under the cab and operated by hydraulics. It enables the boom to swivel on this gear.