In the first half of this year, Hamm will be introducing new tandem rollers with operating weights of between 9 and 11 t. These HD 90–HD 110 P-Tier models are available either with two vibration drums (VV) or with a combination of vibration drum and wheel set (VT). The machines are initially being launched in Brazil and Tier 3 regions of Southeast Asia, Africa and the Middle East.

With their drum diameters of 1,680 mm and high compaction forces, the new tandem rollers deliver the optimum prerequisites for compacting asphalt and are particularly well suited for applications that demand a high surface output and compaction quality.

The three-point articulation is an invaluable feature because it guarantees even weight distribution, which in turn effectively prevents impressions from forming in the asphalt. The machines are driven by a 97-kW Cummins engine. Operators also enjoy optimum visibility, a spacious cab and a range of convenient features including simple controls.

All four new models – HD 90 P VV, HD 90 P VT, HD 110 P VV and HD 110 P VT – are equipped with the electronic machine management system Hammtronic, which not only has many benefits for operators and construction companies, but also enhances compaction quality. Such benefits include significantly lower diesel consumption, gentle machine acceleration and braking during compaction, the Constant Speed function and reduced noise levels.

As Hammtronic controls various functions, such as the water sprinkling system or the edge pressing and cutting device, operator errors can also be avoided. Consequently, compaction results are higher-quality and more homogeneous. With Hammtronic, the tandem rollers are always working in the optimum power range, which is constantly being adapted to the requirement of the individual drives.

Furthermore, the new tandem rollers offer a variety of options, including a ROPS/FOPS cab with heating and air-conditioning system, a lighting package for working on public highways, the edge pressing and cutting device, and LED drum edge lighting. There are two valuable measuring tools – the Hamm Compaction Meter and the Hamm Temperature Meter – that can be configured to incorporate position-accurate compaction and temperature values into the compaction process.

For fast and simple servicing, all maintenance points are readily accessible, providing effective prevention against long downtimes. These tandem rollers can also be connected to the John Deere Operations Centre.