The new 40-t-class telescopic crawler crane from Liebherr, the LTR 1040, is a lightweight version of the LTR 1060. It has a significantly reduced ballast, weighing 20 t less - 10 t of central ballast have been taken off the chassis whilst a further 10 t of counterweights have been removed from the slewing platform.
According to Liebherr, the LTR 1040’s lifting capacities up to a medium radius significantly surpass those of competitors and its 40 m telescopic boom is approximately 30% longer than the standard models in this class. As such, most crane jobs can be performed without a folding jib.
The new LTR 1040 is suitable for assembling prefabricated components. For example, the crane will hoist up to 8.6 t with a radius of 10 m throughout its entire 360° operating range. When it is fully raised, the lifting capacity of the 30.7 m extended telescope is 18.8 t and when fully extended, the 40 m boom can hoist 10 t. Using a 16 m double folding jib, the LTR 1040 can achieve a maximum hoist height of 55 m and can hoist a weight of 3.1 t in this configuration.
The LTR 1040 weighs just 43.5 t, including its 5.6 t of ballast. The axle loads for transport are less than 10 t for a three-axle tractor unit and a four-axle semi low loader. By removing 5 t of ballast, the LTR 1040’s weight can be reduced to 38.5 t, resulting in a gross transport weight of less than 60 t.
The crawler travel gear is retracted to a width of 3.0 m for transport. The low crane height of just 3.15 m ensures that economical standard semi low loaders can be used.
With a 2.5 m erection jib and a second hoist unit, the LTR 1040 can also carry out work in two-hook mode. The load absorbed with the erection jib by the low loader is transferred to the second hook on the telescopic boom. This means that prefabricated components can be rotated into the correct position and moved to the installation site on the crawler travel gear.
The LTR 1040 can hoist up to 17.7 t with four-line reeving of the hook block on the erection jib. The runner on the crane can handle loads of up to 9 t as it can also use a double reeving constellation.
The fine gradation of up to 0.3, 0.7, 1.5, 2.5 and 4 degrees ensures perfect lifting capacities even on uneven site terrain types, said Liebherr. On restricted sites, the LTR 1040 can also operate with its crawler tracks retracted to a width of 3 m.
For safety and convenience, the crane operator can access the cab in any slewing platform setting using folding ladders, a fixed platform on the crawler track and an extra-wide step on the cab. There is no need to climb over the crawler tracks and chains.