The future of heavy compaction across the industry appears to have a strong forward direction towards smaller, more efficient and cleaner machines. In light of that, Wirtgen makes clear where its sights are set in that competitive field, a singular platform for all markets as it unifies two previous compactor series from HAMM. The 3000 series (Tier 3) and the H series (EPA Tier 4/EU Stage V) will hence forth be brought together as the "HC" series, featuring models with an operating weight of 11–25 t (24251-55115,6 lbs).
What's New?
At a glance, the HC series is visually distinct with a new, sleek design, in addition to a new frame concept guarantees increased fuel tank volume. But the innovations aren't limited to esthetics alone. When comparing it alongside the precursor models, HAMM boosts the overall power of the HC by taking centrifugal force up by 15%. Improvements to steering mean a better swing angle and better kinematics, achieved by the inclusion of a new cast articulated joint.
Photo provided by Wirtgen Group
An all new optimization of the weight distribution in conjunction with Traction Control, a redesigned scraper and front-end, the gradeability is better than in any previous versions. This resulted in significantly increased clearance on the drum, meaning that no material can accumulate there, eliminating extra cleaning work. Other upgrades have been added to make for a more comfortable working condition for the operators. The cab now offers over 20% more tread around a 30% increased space and a wealth of new storage compartments. Comfortable climate controls, modern ventilation and significantly reduced noise from vibrations mean an elevated level of operator conditions from inside the cab itself.
In dark conditions the standard LED lights light up the environment. At day and night, thanks to the view channel in the hood, the roller meets the requirements for the field of vision in accordance with DIN EN 474. On the cab, a large additional mirror with proximity detection improves the view of the immediate environment, and design tricks guarantee low-vibration mirrors.
Efficiency and Emissions
A new approach in machine management means the HC series achieves increased overall performance. An integrated ECO mode supports the operator so that they can work in the economical partial-load range as often as possible, which reduces the need for cooling. Top speed is reduced for this – but, thanks to a large travel pump, it doesn't compromise on power. This saves on fuel, and reduces the noise and exhaust gas emissions. With the optional engine stop system, the energy consumption can be reduced even further, and option attractive for those who need to meet ever increasing regulatory restrictions and emissions targets.
The HC series is well prepared for the quality and communication requirements of the future. The "Smart Doc" app, which was developed by Hamm, graphically displays all of the key compaction parameters as well as the compaction progress, and logs the measured rigidity as well as the position data. In the Smart Doc app, even inexperienced drivers can immediately see which areas have been sufficiently compacted and which areas still require compaction. Furthermore, the compactors can communicate, even with digital applications from third parties, via a standardized interface.
With a focus on better integration, efficiency and operational flexibility, the HC boasts itself as highly viable option for a broad range of contractors and jobsite needs. It will be interesting to see how they perform in the real world situations and environments, and if their investment in digital connect technologies pay off for the people on the ground.
