Dynapac North America has expanded its roller product line with the addition of the CO4200 Generation VI double-drum roller with oscillation. The CO4200 VI, says the company, allows the operator to select the system that is most suitable for the application at hand, particularly in applications that require reduced vibration, such as bridge decks, areas adjacent to foundations, and thin-asphalt overlays. The oscillation-compaction concept, says Dynapac, also can help reduce the risk of damage for certain aggregates.
Operating mass for CO4200 VI’s front and rear modules is 11,023 and 10,802 pounds, respectively, a balanced design, says Dynapac, that helps reduce roller marks and delivers a consistently compacted surface. The new model features an oscillation force of up to 27,450 pounds with a frequency of 2,400 vpm. When operated in vibration mode, the unit delivers up to 28,780 pounds of centrifugal force and a vibration frequency of 3,060 vpm in high-amplitude mode, and 18,880 pounds of centrifugal force and 4,020 vpm in low-amplitude mode. The roller is powered by a Cummins QSF3.8 engine and can reach ground speeds of 7.5 mph.
The Dynapac CO4200 VI uses a heavy-duty drum shell fabricated from Hardox 450, an abrasion-resistant steel that provides dent and abrasion resistance. The new roller also “streamlines” serviceability, says Dynapac, by providing access to belts and other components by integrating manholes into the drum.