The BW 211 DH-5 single-drum vibratory roller uses a dual-pump drive system, allowing the roller to climb grades as steep as 60 percent, says the company. The drive system dedicates one travel pump for drum drive and a separate pump for the rear axle, which includes a No-Spin differential lock, allowing the machine to delivers enhanced gradeability in both forward and reverse travel directions, says BOMAG. The new machine is designed for compaction of mixed soils, gravel, and rock fill at depths reaching 27.6 inches. A dual-frequency/dual-amplitude vibratory system matches compaction output to site needs, and setting the drum to 1,800 vpm with an amplitude of 0.075 inch compacts high-lift thickness, says BOMAG.
For increased productivity when compacting thinner lifts, the vibration system can be set to 2,040 vpm and a 0.039-inch amplitude. The new machine uses a 128-horsepower Deutz TCD 3.6 L4 diesel engine that meets Tier 4-Final emissions standards. By matching engine speed to the task at hand, standard ECOMODE speed control lowers fuel consumption by up to 30 percent versus operating at continuous high idle, says BOMAG. Contractors can lower fuel consumption even more, says the company, by equipping the machine with the optional BOMAG ECOSTOP function, which automatically shuts down the engine after a defined idle period. Additionally, available compaction measuring technology, such as he optional BOMAG ECONOMIZER and TERRAMETER, indicate to the operator know when optimum soil stiffness is achieved,
The maintenance-free, 35-degree articulation joint requires no lubrication, says BOMAG,
and features up to 12 degrees of oscillation to keep the drum and wheels in constant contact with the ground when encountering irregular terrain. The roller’s wide-opening, hinged hood facilitates access to the engine and components, says the company, and all cables are protected against damage.