Liebherr LR 1750/2 - Fanger
Fanger's new Liebherr LR 1750/2 was delivered in july 2016, at that moment it was the largest crane in Fanger's fleet and in Switzerland. At Fanger the crane replaces the 20-year old Liebherr LR 1400/1, at that time also the largest crane in the country.
The very beautiful crane was directly transported to the construction site in Menznau (CH). At the plant of a manufacturer of wooden materials a large cylinder needs to be replaced.
The very first lift of the crane would be the lift of this temporary construction.
The crane is erected with 170 tonnes of counterweight, that has a 9.2 meter tailswing. The maximum counterweight is 245 tonnes, but that is in configuration with derrick counterweight not required.
The approx. 90 tonne temporary construction is lifted. The crane is fitted here in HSLD3B configuration; tapered main boom with a 38.5 meter derrick boom and additional derrick counterweight.
The crane is erected with a 70 meter main boom. Fanger bought the crane only with main- and derrick boom and three different boom heads; 750, 600 and 400 tonnes. Here is the last mentioned in use. The crane is prepared for a luffing jib.
The crane is powered by a Liebherr 8-cylinder diesel engine with 618 hp.
During the first lift was the counterweight tray attached, but additional counterweight was not required.
The adjustment winch for adjusting the main boom is configuration with derrick boom is integrated in the boom foot of the derrick boom.
The biggest optical differnce with it's predecessor model LR 1750 is the new cabin.
The undercarriage of the crane is 11.9 meters long and 10.3 meters wide.
Between the tracks is 45 tonnes of central counterweight installed. That exists out of a 10 tonne base plate and a single slab of 12.5 tonnes on both sides. The maximum central counterweight is 95 tonnes and is used when the crane is not used with derrick counterweight.
Difference with the prececessor LR 1750 is also the possibility to erect a derrick boom D3 or D4, resp. 38.5 or 42 meters long. The standard derrick boom length is 31.5 meters.
The tracks are 11.9 meters long, 1.5 meters wide and 2.13 meters heigh. The mass each is 46 tonnes.
The next day. The cylinder that will be replaces is skidded outwards onto the temporary supper sctructure.
The old cylinder is hanging in the crane. The total weight in the crane is now 274 tonnes on a 31 meter radius. The hook, slings and spreader have a mass of approx. 30 tonnes.
The load is lifted up to a 64 meter height to slew over the other plant parts. At the same time the crane drives around 15 meters rear wards.
The crane has 362,5 tonnes of derrick counterweight, that is nearly the maximum. The counterweight radius is 13 meters.
The cylinder will be lowered in a small courtyard and will be demolised here.
The new cylinder would be installed the next day. A very impressing first job for the LR 1750/2!