Liebherr unveiled at the ConExpo its 190 ton LTM 1160-5.2 five axle chassis mobile crane. The company has increased the load capacity to about 25%, of its new presentation compared to its predecessor, the LTM 1160-5.1. The newer version uses the same telescopic boom of 203 ft however has been reduced in width to 9’0” from its predecessor’s 9’10”. The reduced width now allows the mobile crane to move in constricted areas and drive on public roads as well.
What makes the LTM 1160-5.2 stand out of the crowd is its superstructure which is superbly powered by only a single engine unlike other cranes of the class which come with twin engine concepts. The crane chassis on a single engine operates using a mechanical shaft. This mobile crane is Liebherr’s second crane model of five axle to be featured with a single engine, while the initial one was presented at the 2013 Bauma as LTM 1300-6.2. In the crane chassis the gear shaft routes from distributor gear, using gears of 2 meters that comes all the way through to the center of the pump distributor gear’s slewing ring.
A six cylinder, Tier 4 final Liebherr engine stirs up 544 hp at a rpm of 1900 offering a 2,516 Nm torque at an rpm of 1350. The ZF-AS 12 speed Tronic gears are used to transfer power to the crane axles, while the zero wear hydrodynamic, intarder brakes perform as a retarder. The option of a current Telma Eddy brake is also available.
The low speed of the engine in the chassis offer adequate crane work power while the mechanical shaft allows a high level of efficiency. The removal of the superstructure separate engine offers a provision of condensed maintenance weight and work. The reduced weight helps load bearing components which in return enhances the load capacity of the crane.
The new add on program developed for the unique crane drive concept offers a single engine to cranes while the mechanical shaft option offers the possibility of running the machine on very low rates of fuel consumption. Not only does this allow the pump drive to be completely disconnected automatically whenever the engine is idle but also reconnects it through an intelligent controller whenever required within seconds only.
Like most of the other mobile LTM crane models, the 1160-5.2 also features pneumatic disc brakes. The 190 ton rear axle model acquires electro hydraulic active steering based on the speed of the vehicle. This feature not only enhances the vehicle’s maneuverability but also decreases tire wear. The 5 programs of steering can be very conveniently selected at a simple touch of a button.
With a maximum weight of 132,000 lbs and axle load of 26,200 lbs, the new LTM 1160-5.2 is ready to carry a three sheave hook block, its dual folding jib and storage box with a liberal payload.
The new mobile crane also comes with a Liebherr LICCON2 crane control which offers the provisions of a cost effective and simple extension towards an absolute remote control crane system.