Due to the way they particularly operate, hydraulic truck cranes are different from other crane types. Instead of using a winch in order to wind up cables to provide the lifting force, hydraulic cranes utilize oil instead. 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 inside his cab. Usually, hydraulic truck cranes utilize a pump that has 2 gears.
Since 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 one engine which could control both the truck and the crane.
Other Components
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 roller or ball connected to the carrier. It could 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: Outriggers are units which cranes will utilize to maintain its balance. It uses hydraulics to lift the truck.
Load Movement Indicator: The load movement indicator is lights that flash so as to warn the driver that maximum weight is approaching.
Pump: The pump's purpose is to steer the outrigger.
Steel Cables: The steel cables are reinforced and run through the jib and the boom. They are able to 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 can be raised and lowered.
Rotex Gear: The rotex gear is situated under the cab and operated by hydraulics. It allows the boom to swivel on this gear.