Liebherr launches another five-axle model all terrain crane at ConExpo, the LTM 1130-5.1 130-metric ton (145 ton) mobile crane. Liebherr says the new crane features a long and variable boom system with outstanding load capacities, and its compact design and other attributes make it flexible and economical to operate.
The LTM 1130-5.1 has a 60-meter telescopic boom, which can be extended with a 10.8-meter to 19-meter (196 foot) swing-away fly jib and additionally with two lattice sections, each 7 meters (22 feet) long. The swing-away fly jib has hydraulic adjustment as an option. The load can be moved under full load. With a maximum axle load of 12 metric tons (13.5 tons), the new crane carries with it up to 9 metric tons (11 tons) of ballast, and is capable of performing a variety of operations without any additional ballast. The large number of additional ballast variations and the variable jib system give the crane more flexibility than other cranes in its class, Liebherr says.
Because of its compact dimensions, the new LTM 1130-5.1 can maneuver on confined building sites. Despite a tire specification of 16.00 R 25, the 12.26-meter (40 foot) long chassis is only 2.75 meters (9 feet) wide and operates on a maximum turning radius, measured across the operator's cab, of 10.39 meters. Double telescoping outriggers provide a support base width of 7.5 meters (24.6 feet). In cramped conditions, the crane can also be operated with a support base width of just 4.95 meters (16.2 feet) if required.
The air operated disc brakes offer improved braking performance, and are not impaired even at high braking temperatures. Further advantages are the ease and speed with which the brake linings can be changed and the fact that they are fitted with wear indicators.
The new LTM 1130-5.1 also features Liebherr's active speed-dependent rear axle steering, which has proved extremely successful and reduces tire wear. The operator has five different steering options to choose from, and these are ideally suited to different operating situations.
The Liebherr six-cylinder inline engine in the undercarriage is Tier 3 compliant and delivers 370 kW / 503 hp at 1,900 rpm. It has a maximum torque of 2,355 Nm at between 1,100 and 1,500 rpm. Power transmission to the crane axles is via the 12-speed ZF AS-Tronic gearbox. An intarder is integrated as standard in the gearbox as a non-wearing permanent brake.
Tier 3 compliant
The Liebherr four-cylinder inline engine is also Tier 3 compliant and has an output of 145 kW / 197 hp at 1,800 rpm and a torque of 920 Nm at 1,100 – 1,500 rpm. Load-sensing electric controls in the hydraulic system enable sensitive control of the crane's working movements. Up to four different movements can be carried out simultaneously. Depending on the nature of the hoisting task and the crane operator's requirements, torque can be switched easily from 'open' to 'hydraulically locked.