New 100 tonne four axle Liebherr AT
By Alex Dahm06 October 2008
The new 100 tonne capacity Liebherr LTM 1100-4.2 all terrain replaces the LTM 1100-4.1 launched at the Intermat exhibition in 2003.
Its 60 m boom exceeds its predecessor's by 8 m. The new crane is also stronger, especially with the boom fully telescoped and in a steep position, where increases are about 30%, the manufacturer said. Capacity with the boom fully extended is 10.2 tonnes and the strongest four axle crane in the market, Liebherr said.
The boom is six telescopic sections plus the base section and is extended and retracted using the Telematik telescopic system. Two lattice sections, each 7 m long, and the 10.8 - 19 m long swing-away jib give the LTM 1100-4.2 a hook height of 91 m and a radius of 58 m. The swingaway jib can be set at 0°, 20° and 40° and there is an hydraulic option where the jib can be luffed under full load between 0° and 40°.
On 16.00 R 25 tyres the 10.6 m long carrier is 2.75 m wide and its turning radius, measured over the carrier cab, is 8.3 m. The carrier has air operated disc brakes and rear axle steering. Power is from a six cylinder 350 kW (476 hp) Liebherr inline diesel driving through a 12-speed ZF-AS-Tronic automated manual gearbox with intarder. A two-stage transfer box gives crawl speeds for manoeuvring.
In the superstructure is a Liebherr four cylinder inline 129 kW (175 hp) engine to power the hydraulic pumps for the upper crane works. Up to four motions can be driven simultaneously. The tail swing of the counterweight, up to 28.2 tonnes, stays within 4.11 m. Outrigger spread is 7 m and, for job sites where space is restricted, it is possible to work with a reduced supporting width of 5 m. The LTM 1100-4.2 has the new Liebherr LICCON2 crane control system.
The crane driver can attach and detach the hook block at the front bumper via a remote control for the hoist winch and luffing cylinder. The remote control makes it easier for the operator because previously the motions could only be made from the crane cabin so the hookblock could only be seen via a mirror or a second person was needed to give instructions. The system is also used for remote control of the hydraulic erection device to assemble the swing-away jib.