The largest crane in operation by Yew Choon from Singapore (SG) is this sharp Demag CC 2800. The crane was used in March 2020 to lift some heavy parts into a construction site.
It is a 600 tonne crawler crane with year of manufacture 2003.
The undercarriage is 9.9 meters wide and 11.66 meters long. Between the tracks is in total 60 tonnes of central counterweight installed, that exists out of four slabs with each 15 tonnes.
The counterweight on the superstructure exists out of a 20 tonne base plate with in total sixteen slabs with each 10 tonnes, the total mass is 180 tonnes. The tailswing of the superstructure is 8 meters.
The 200-tonne hook is reefed here on 8 lines. The attached lifting beam has a maximum capacity of 300 tonnes.
The superlift counterweight exists out of fourteen steel slabs with approx. 10 tonnes each. On top a borrowed ballast box of a prime mover. The superlift frame itself also weights 10 tonnes. The full weight is approx. 150 tonnes. The assist crane in the background is a Tadano ATF 180G-5, also from Yew Choon.
Because the job site was very close to an airport, the crane was only allowed to work after 01:00 AM on certain days. The load needs to be tilted, that is why both cranes are attached here already.
The crane is erected in SSL configuration with a 72 meter main boom and 30 meter superlift boom.
The 45-tonne tank was installed on a 52 meter radius.
During the next night two generators with each 38 tonnes had to be installed.
Because the radius was smaller for these generators, approx. 60 tonnes of superlift counterweight was required.
A few months later I could take some more detailed photos of the crane when it was erected in their yard.
The crane is powered by a Mercedes-Benz OM 502 LA, an 8-cylinder diesel engine with a power of 380 kW (516 hp). Below the boom foot of the main boom are the reefing winch and the slew motor installed.
The crane is equipped with two 16-tonne hoist winches. The 180 tonnes of counterweight are only possible in combination with 60 tonnes of central counterweight.
The tracks are 11.66 meters long, 1.5 meters wide and 1.685 meters high. The transport mass each is 40 tonnes.
In the boom feet are winches installed. In the boom foot of the superlift mast is the adjustment winch for the main boom installed. In the boom foot of the main boom is the auxiliary winch installed. The adjustment winch for the luffing jib can be installed in the empty position.
Here was the 400-tonne hook reefed at 18 lines. The runner has a length of 2 meters.
With thanks to Yew Choon!