New from Sennebogen in Germany is a 70 tonne capacity telescopic boom crawler crane.
At first glance the new 673 R telescopic boom crawler crane may look like one shown at the last Bauma exhibition in Munich, Germany in 2010. It carries the same name but that is pretty much where the similarity ends, according to the manufacturer. For various reasons that prototype shown in 2010 was not developed into a production model. The new 673 R “is a totally new telescopic crawler crane with an excellent performance and, maybe most important, the best match in regards of our company philosophy: Keep it safe and simple,” Erich Sennebogen told IC.
At 70 tonnes, capacity-wise, the new 673 R fits in the model range in between the existing 40 and 80 tonne models. It is close to the 80 tonne 683 but is a different animal, Sennebogen says. In addition to having a longer boom, it is available with a wheeled undercarriage, which the 673 does not have. In addition, the larger model has a Star-Lifter undercarriage, which allows the crawler frames to be removed from the main bridge for transport reasons.
The 673 R has an hydraulic full power boom, designed for this application and not adapted from an existing one, for example, that was originally designed for an all terrain crane. Its 36 m can be further extended to 51 m with a 15 m fly extension. The heavy duty four section design with multiple hydraulic cylinders means that the boom extension and retraction system is different, Sennebogen said. It is always connected hydraulically and can be telescoped under load.
Travel is possible with up to 90% of the permitted load, the manufacturer says. In addition out of level working, with up to 4 degrees of sideways inclination, is also permitted. Capacity at 10 m radius with 17.4 tonnes of counterweight and the boom extended to 30.3 m, is shown in the preliminary chart as 13 tonnes. At 20 m radius capacity is given as 5.7 tonnes.
Power is from a 160 kW Deutz TCD 6.1 L6 diesel to Tier IIIb emissions standard. Operating weight, with 8 m jib, 35 tonne hook block, two winches, 17.4 tonnes of rear counter weight and 8 tonnes of carbody counter weight, is just over 69 tonnes, Sennebogen said.
The operator is accommodated in the new Max Cab, which can be tilted up to 20 degrees for a better view of the load. An elevating system to lift the cab by up to 2.7 m is optional. Inside is the new Sencon control system. It is designed to be a simple and easy to use single point of reference for as many functions as possible while remaining clear and legible.
For the full story on this new crane see the March issue of International Cranes and Specialized Transport magazine.