Liebherr LR 1750/2 - Yew Choon
At the beginning of 2021 took Yew Choon from Singapore (SG) this very sharp and impressive Liebherr LR 1750/2 into operation. Here was the crane fitted for test lifts in their yard. It is a 750-tonne crawler crane.
The undercarriage of the crane is 11.9 meters long and 10.8 meters wide. Between the tracks is in total 95 tonnes of central counterweight mounted, that exists (per side) out of a 10-tonne base plate with three blocks of each 12.5 tonnes on top. On top is a large platform made.
This crane is equipped with the wide tracks with double drives, the tracks are each 11.9 meters long, 2 meters wide and 2.13 meters tall. The transport mass each is 55 tonnes.
The crane was here performing various test lifts. Here is 387.5 tonnes of superlift counterweight floating above the ground.
The superlift tray can be split, this is the VarioTray-system of Liebherr. The centre part can be split from the lower tray so that the crane can work with a smaller superlift counterweight.
The counter-radius of the tray can be adjusted using hydraulics between 15 and 21.8 meters. Here was the counterweight pushed out up to the maximum counter-radius.
The crane is powered by a Liebherr D9508 A7, an 8-cylinder diesel engine with a power of 455 kW (618 hp).
Here was the crane fitted with the superstructure extension, this moves the counterweight two meters more backwards. The crane is here fitted with 170 tonnes of counterweight on the superstructure, that exists out of twelve blocks with a mass of 12.5 tonnes each and two brackets of 10 tonnes each.
Usually are such configurations mainly used for the installation of wind turbines.
A sharp detail of both winches in the boom feet. The winch in the boom foot of the derrick boom is for the adjustment of the main boom angle and the winch in the boom foot of the main boom is the auxilairy winch. This crane doesn't have a luffing jib.
The crane was here fitted in SXLD4B configuration; that is the configuration with a 42 meter long derrick boom and a main boom using three different dimensions. The first main boom parts are 3.5 x 3 meters, that tapers to 3 x 3 meters and that tapers to 2.6 x 2.4 meters. The 400-tonne main boom head is used. In this configuration is the main boom minimum 105 meters long and maximum 168 meters long.
Here is the crane fitted with a 154 meter long main boom.
Here was a 50-tonne test lift performed, this is the superlift frame of the Demag CC 2800 with four blocks each 10 tonnes. A very sharp and impressive crane of Yew Choon! Ready for some heavy lifting in and around of Singapore!