Rock Products

OCT 2018

Rock Products is the aggregates industry's leading source for market analysis and technology solutions, delivering critical content focusing on aggregates-processing equipment; operational efficiencies; management best practices; comprehensive market

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www.rockproducts.com ROCK products • October 2018 • 29 constant power to the wheels and drum with an electronic self-adjusting torque control system. The machines' new 154-hp, Tier 4 Final engine also delivers greater torque than previous models. Best-in-class centrifugal force allows for higher lifts and deeper compaction depths completed in fewer passes for increased productivity. Performance on rough, uneven ter- rain is improved with an oscillating articulated roller joint that maintains consistent drum-to-ground contact, and a superior drum design reduces drift and maintains constant compaction throughout each rotation. Available options include automatic traction control, padfoot and blade, and a more powerful HX drive designed to meet the demands of the most extreme conditions with increased torque and speed over the standard hydrostatic drive system. Available in both open and cab configurations, the SV212D and SV216D models feature a spacious, comfortable and intuitive operator environment with an adjustable seat that swivels up to 50 degrees, providing excellent visibility of the drum surface. Rear visibility is maximized with a sloped rear deck design. Like all CASE machines, the SV212D and SV216D are designed for groundline serviceability. A push-button electro-hydraulic engine cover and push-button electro-hydraulic cabin tilting provide easy access at ground level to all fluid ports, drains, service checkpoints and filters for simplified maintenance. CASE Construction Equipment, www.CaseCE.com Hamm At this year's World of Asphalt show, Hamm's innovative DV+ 90i VV-S rigid-frame, drum-steer, split-drum roller was introduced. The 9.9-ton (9 metric tonne) DV+ 90i VV-S (vibration in both split drums), the DV+ 90i VO-S (vibration and oscillation in split drums), and DV+ 90i VT-S (vibration and pneumatic combi roller) are the latest tandem rollers in the DV+ series. In 2017, Hamm launched the line in North America with the DV+ 70i VO-S model weighing 7.7 tons (7 metric tonnes). These highly productive, pivot-steered rollers represent the pinnacle in asphalt compaction, and meet all requirements for optimum compaction quality. Operators are enthusiastic about the excellent visibility and the new, intuitive Easy Drive operating concept. Construction companies and roller drivers will find every- thing they would expect from a modern roller in the DV+ series of tandem and combi rollers. The DV+ is economical to use, easy to operate and designed for maximum productivity. An intelligent drive control – plus pivot steering with four steering modes and large turning angles – form the basis for the highest possible compaction quality. The design is well thought out, enabling an excellent view of the drums and the work environment, an important point when it comes to getting the smoothest mats and satisfying the strictest quality and safety requirements. With the DV+, surfaces can be quickly compacted to a high standard because all components in these rollers are per- fectly matched to one another. An important factor is the always evenly distributed weight of the DV+. This is due to the positioning of the engine in the center of the machine and the two-part water tank distributing the weight evenly in all operational states. The standard split drums fitted as standard feature vibration, and represent a further plus factor for quality. They ensure perfectly compacted asphalt layers, even in tight curves. There is also a very large turning angle, and the enormous track offset of the pivot steering allows the DV+ to be steered with great sensitivity in four different steering modes. Thanks to the sophisticated automatic reverse transmission, gentle braking and reversing with simultaneous seat rever- sal and subsequent acceleration are very easy. The result is perfectly smooth asphalt paving with no bumps or hollows. Refueling breaks interrupt the compaction process. To avoid them, Hamm has equipped the DV+ series tandem rollers with large water and fuel tanks. Filling is extremely user- friendly because the water can be replenished centrally from the ground very quickly via a pressurized supply of at least 14.7 psi as a standard feature.

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