Kobelco 7250S
Marina Technology & Construction
This impressive Kobelco 7250S is owned by Marina Technology & Construction from Singapore (SG) and is mainly deployed from a pontoon for operations in water and along coastlines. It is a 250-tonne crawler crane built in 2013.
The crane is powered by a Hino P11C-VH, a 10.52-litre 6-cylinder diesel engine with an output of 271 kW. This diesel engine drives four hydraulic pumps.
The undercarriage is 8.97 metres long and 7.47 metres wide. The crawler tracks are 8.97 metres long, 1.07 metres wide and 1.36 metres high. For road transport, the crawler tracks must be separated from the body and each weighs 20.3 tonnes.
The crane is fitted here with 75.1 tonnes of counterweight installed; the counterweight has a slewing radius of 5.85 metres. This counterweight configuration is not complete, as the full counterweight amounts to 97.1 tonnes. Due to operation from a pontoon, the counterweight has been reduced.
Due to operation from a pontoon, no central counterweight is installed on the undercarriage. The crane is equipped with two 13.5-tonne hoist winches.
For operation from a pontoon, the crane has a dedicated load chart that allows for greater inclinations. This includes a lateral inclination of 1.5 degrees and a forward inclination of 3 degrees. In this case, the maximum lifting capacity is 130 tonnes at a radius of 6 metres.
Here, the crane is assembled with a main boom length of 42.7 metres. In this configuration, according to the load chart for pontoon operation, the crane can lift a maximum of 56.5 tonnes at a radius of 11.4 metres or 12.1 tonnes up to a radius of 38.6 metres. When the crane is deployed on firm ground and with full counterweight, it can lift a maximum of 98.6 tonnes at a radius of 9.2 metres or 17.7 tonnes up to a radius of 38.6 metres.
The main boom has a base length of 15.2 metres and can be extended to a maximum length of 76.2 metres.
A very impressive and powerful crane from Marina Technology & Construction!