The first talks between Matthias Wasel from Wasel, Mag. Peter Stöttinger, from Felbermayr and Dr Ulrich Hamme, Engineering and Development Director at Liebherr in Ehingen, took place at the Bauma in 2019. Both customers addressed similar requirements to Liebherr. “The LTC 1050-3.1 is a good compact crane, which particularly comes into its own when used inside buildings,” says Stöttinger. “However, TELEMATIK was not really a familiar technology for our crane operators in the compact crane segment. The rope pull mechanism has been in used for decades on small cranes and is very widespread. Our operators are very familiar with it and have come to appreciate it over many years.”
“It also takes slightly longer to extend and retract the boom using TELEMATIK. Particularly when we are working inside buildings, where production often has to be stopped, every minute counts. Fast telescoping with a high load is worth its weight in gold in these situations – which is why we directly approached Liebherr with our experience at the Bauma”, says Wasel.
Immediately after the Bauma, the design team at Ehingen started work on the development of the rope pull boom for the time-tested LTC 1050-3.1 compact crane. “We are always delighted when our customers come to us with valuable insights and requests, regardless of whether they refer to crane jibs, technologies or complete booms. This is yet another great example for our view that we should drive forward developments together in partnership. So it is a great pleasure for us to be able to hand over the first cranes featuring this boom technology”, says Dr Hamme.
The new boom with rope pull mechanism is 31 metres long and consists of a pivot section and 4 telescoping sections – one less than the TELEMATIK boom. The telescoping sections are extended and retracted using a dual-action 2-stage hydraulic cylinder. Stage 1 extends telescoping section 1. Stage 2 extends telescoping sections 2 to 4 synchronously using a 2-way pulley block. The new boom also delivers high telescoping lifting capacities, an important feature for use inside buildings. This boom can telescope at high speed using familiar technology.
The TELEMATIK boom, which has been available since the market launch of the LTC 1050-3.1, delivers high lifting capacities with long booms and wide radii. But even with the booms not fully extended, TELEMATIK delivers higher lifting capacities as the individual telescoping sections can be extended in any sequence and independently of each other. “Today, customers can choose between the powerful, long TELEMATIK boom and the high speed, familiar rope pull mechanism. Depending on the applications for which the compact crane is needed, one or the other variant is better suited,” says Dr Hamme.