Equipment World Digital Magazine
Issue link: http://read.dmtmag.com/i/917937
EquipmentWorld.com | December 2017 55 Wirtgen intros Hamm DV+ tandem asphalt rollers, expands lineup The Wirtgen Group introduced its DV+ tandem asphalt roller series, an expansion of the HD Compactline compact tandem asphalt rollers, a new H series soil compactor and the GRW 180i pneumatic tire roller. The DV+ series, represented in North America by the DV+70i VO-S, comes in three versions: the VV (double vibration), VO (one vibration and one oscillation drum) and VT (combination). All three can be con- fi gured as a ROPS or a cab. The machines have standard split vibration drums. Pivot steering with large angles and track offset allow sensitive steering in four modes. The HD Compactline features what the company calls a "wasp" waist to allow for articulated movement. The series includes the new HD 10C VT 39-inch model, which can provide compact near walls and high boundaries through inwardly offset drum suspension. The new models of the DV+ and HD+ tandem roller series – as well as the H Series soil compactors – make use of the Easy Drive operating concept. Its ergonomi- cally optimized structure features a small number of language-neutral controls. All rollers are operated in the same way, with modifi cations to suit the specifi c functions of the individual series. Volvo DD120C and DD140C rollers feature higher fuel effi ciency Volvo's new DD120C model features a 79-inch rolling width, while the DD140C has an 84-inch rolling width. Though these are the largest of Volvo's asphalt compactors, they offer 20 percent more fuel effi ciency over previous models via the Volvo D13J Tier 4 Final engine that offers high torque at low rpm. Both models have 4,000-vpm vibration frequency and a new water fl ow-rate calibration process for setting a mini- mum fl ow for spraying water on drums.