Liebherr Introduces New Mobile Crane

Liebherr-Werk Ehingen GmbH introduces the LTM 1100-4.2 mobile crane, the successor of the LTM 1100-4.1, which was introduced during the Intermat 2003. With a telescopic boom length of almost 197 feet, the new 110-ton crane exceeds the predecessor, which was produced 350 times, by more than 26 feet, while offering higher capacities. With a capacity of 11.2 tons at the 196.8-foot-long telescopic boom the crane sets new marks in this crane class, according to the company.

The telescopic boom of the new LTM 1100-4.2 consists of the base section and six telescopic sections and is comfortably extended and retracted by the rapid-cycle telescopic system TELEMATIK. Two lattice sections, each almost 23 feet long, offer an elevated hinge point for the 35 to 62-foot swing-away jib. Thus the LTM 1100-4.2 reaches a hook height of 298.5 feet and a radius of 190 feet. The swing-away jib can be attached at an inclination of 0, 20 and 40. Optional a hydraulic adjustment system is available, by which the jib can be luffed under full load between 0 and 40. Hoist winch and a 9.5-foot assembly jib as well as a boom nose can be offered.

Thanks to its compact dimensions the new 4-axle crane can maneuver on tight jobsites. Even with 16.00 R 25 tires the 34.7-foot chassis is only 9 feet wide. The turning radius measured over the carrier cab amounts to just more than 27 feet. The tail swing of the counterweight up to 28.2 tons stays within 13.48 feet. With single telescopable outriggers a supporting width of almost 23 feet can be reached. At limited jobsite conditions it is also possible to work with a reduced supporting width of 16.4 feet.

The air-activated disk brake provides increased safety and efficiency. It offers considerable higher braking power, which also remains even at high brake temperatures. A further advantage results from the fast and simple replacing of the brake pads, which are equipped with wear indicators.

The LTM 1100-4.2 also features active rear-axle steering, reducing tire wear. The driver has five different steering programs at his command, which he can choose comfortably for the different driving situations.

The six-cylinder Liebherr inline carrier engine produces a power of 476 hp at 1,900 rpm. Its maximum torque of 2,230 Nm is available between 1,100 and 1,500 rpm. The power is transferred to the crane axles by a 12 speed ZF-AS-TRONIC gearbox. As a wearfree service brake an intarder is installed as standard. The two-stage transfer gearbox allows for minimum crawl speeds during maneuvering. The driving safety is enhanced by the ABV system (automatic blocking preventer). The anti-slip control ASR prevents the slippage of the wheels during the start of driving.

The Liebherr four cylinder inline superstructure engine provides a power of 175 hp at 1,800 rpm and a torque of 815 Nm at 1,100 to 1,500 rpm. Within the hydraulic system the electric load-sensing control provides for sensible working motions. Up to four motions can be driven simultaneously. Depending on the requirements of the lifting job and the crane driver the slewing gear can comfortably be changed from “open” to hydraulically locked.

Liebherr's crane control LICCON2 is installed, which offers a further enhanced operational comfort due to its additional functions. The power as well as the capacity of the computer have been improved. The color display of the data on the LICCON monitor in the superstructure cabin improves readability and clarity. For the erection functions a mobile and multifunctional display unit BTT • the Bluetooth terminal • is provided. With this the crane can be comfortably and safely supported.

The crane driver also has the possibility to attach and detach the hook block at the front bumper within sight by remote control of the hoist winch and the luffing cylinder of the telescopic boom. This new function assists the driver, because up to now the hook block could only be seen from the crane cabin by means of a mirror or a second man had to give instructions. The BTT is also used for the remote control of the hydraulic erection device for assembling the swing-away jib.

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