Liebherr Successfully Tests LR 1800-1.0 with 880-U.S.-Ton Boom Top
Sept. 15, 2020 – Liebherr has successfully tested an 800-tonne (880-U.S.-ton) boom top and matching load block for its LR 1800-1.0 lattice-boom crawler crane. The company says the new top (or “head”) will be available for sale soon. The boom top can also be used with Liebherr’s 1,200-U.S.-ton capacity LR 11000 lattice-boom crawler crane.
Liebherr has now delivered more than ten of its new 800-tonne (880-U.S.-ton) LR 1800-1.0 crawler cranes to customers in Europe, North America, and Asia. All of them are equipped with the standard 650-tonne (715-U.S.-ton) S head section and are used for heavy hoisting work in industry and for wind turbine erection.
“The standard head is absolutely adequate for the vast majority of jobs,” said Jens Könneker, product manager for crawler cranes at Liebherr. “However, the LR 1800-1.0 is designed to produce its maximum lifting capacity in real-world conditions.”
Könneker noted that the LR 1800-1.0 can lift 800 tonnes (880 U.S. tons) at a 9m (29.5’) radius on a 57m (187’) boom.
“That gives it plenty of scope for real applications. That is why we built the 800 tonne head, and now we have tested it as well,” said Könneker.
For acceptance testing, the test loads are about 25% higher than the capacities shown on a crane’s capacity chart to ensure a high level of safety when the crane is actually in action. The new 880-U.S.-ton head and the new hook block to match it passed the test with flying colors with an 1,100-U.S.-ton test load.
Könneker said, “The new hook block can be used on both the LR 1800-1.0 and the LR 11000. That is very important for customers who have both crane models. It enables them to use this block for both cranes flexibly and economically. As a result of the higher rope pull on the LR 11000, it can hoist up to 1,000 tonnes.”
For the test hoist, the LR 1800-1.0 had been set up with 70 tonnes (77 U.S. tons) of central ballast, 170 tonnes (187 U.S. tons) of slewing platform ballast, and 228 tonnes (250.8 U.S. tons) of derrick ballast, as well as a 33m (108.3’) derrick boom.
A ballast trailer was used for the derrick ballast. However, the test could also have been carried out with suspended ballast. The ballast trailer is also new and will be available for delivery shortly.
