The Liebherr LTR 1220 telescopic crawler makes its first appearance at Bauma 2013, Munich.
The new 220 tonne crawler has a 60 metre telescopic boom, giving more load capacity, the manufacturer said. Its boom is derived from the LTM 1220-5.2 all terrain type wheeled mobile crane. The Telematik telescoping system allows fully automatic boom extension.
A 12.2 to 22.2 m two-part swing away jib can be lengthened with two 7 m lattice sections. Another 7 m lattice section is also available, fitted between the telescopic boom and the swing-away, to raise the connection point of the jib, which can be luffed by up to 45 degrees.
Hydraulic adjustment under full load is also an option. The travel gear of the LTR 1220 can be hydraulically telescoped out from the carrier width of 4.5 m to the intermediate width of 5.88 m or the maximum 7.25 m. Charts are available in the LICCON control system for all three settings.
On uneven ground the LTR 1220 can operate out of level, with side inclination up to 4 degrees, Liebherr said.
Power for the 220 is from a seven-cylinder in-line diesel engine producing 230 kW and generating a maximum torque figure of 1,300 Nm. Cable pull is 105 kN for rapid lifting cycles. A main area of application is installing prefabricated components. A 3.4 m erection jib and second hoist gear allows installation work in two-hook operation. It is also suitable as an auxiliary crane in the installation of wind power systems and handling components.
For transport the basic machine, with 1 m wide crawlers, weighs about 90 tonnes and has a minimum overall width of 5.01 metres. Without crawler frames, the unit weighs about 54 tonnes, including the jack-up cylinders and the transverse beams. It is 3 m wide and 3.2 m tall. By removing the transverse beams, the weight can be further reduced, to 47 tonnes.