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The company claims that the machines deliver high-quality compaction and is offering an array of variants to suit different customer requirements. Models are offered with split and non-split drums, as well as oscillation and combination variants.

An integrated automatic reversing system is fitted that brakes and then accelerates the rollers quickly and smoothly. The electrically-adjustable seat also turns to face the direction of travel automatically. Other features include the firm’s Smart Compaction Assistant that helps optimise compaction as well as a high visibility cab that includes a window in the floor for a better view of the drums.

Even for its size, the EU Stage V emissions compliant dozer offers unrivalled visibility with its distinctive super-slant nose, razor sharp response, heavyweight performance and lightweight consumption.

Operating weights of the D71EX-24/PX-24 range from 22,600-24,000kg with blade capacity up to 5m³ and the Komatsu engine puts out 179kW of power at 2,100rpm.

The dozer’s Parallel Link Undercarriage System features rotating bushings to help minimise maintenance downtime and cost of ownership. EXi and PXi versions benefit from second generation Intelligent Machine Control, the iMC 2.0, that continuously scans the jobsite and uses the data to plan the next pass.

It comes with ergonomic one-touch controls to allow any operator to drive like a pro.

One platform for all markets
With HC Series, HAMM is bringing together the two previous compactor series from HAMM – the 3000 series (Tier 3) and the H series (EPA Tier 4/EU Stage V) – on one platform including models with an operating weight of 11–25 t (24251-55115,6 lbs).

New design
The HC series is recognizable from the new, athletic design and the view channel in the engine hood. A new frame concept also guarantees increased tank volume; in particular, in future, the heavy compactors will be delivered to the construction site with a 336 l (88,8 Gal) fuel tank.

Impressive compaction parameters
In comparison to the predecessor models, HAMM has increased the compaction power. The manufacturer has increased the centrifugal force by up to 15%; and the static linear load is as high as 80.6 kg/cm (451,6 lbs/in). There are even innovations when it comes to the steering: A new cast articulated joint with articulated joint lock allows for a greater steering and swing angle with improved kinematics. Thanks to the optimized weight distribution in combination with the Traction Control, the gradeability has also been further improved. Furthermore, the front vehicle and the scraper have been redesigned. This has resulted in significantly increased clearance on the drum, meaning that no material can accumulate there, which eliminates cleaning work.

Great power, economical in continuous operation
Thanks to new approaches in machine management, the HC series achieves increased overall performance. The 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. The speed is reduced for this – but, thanks to a large travel pump, without compromising the power. This concept saves fuel, and reduces the noise and exhaust gas emissions. With the optional engine stop system, the energy consumption can be reduced even further.

Comfortable workstation
Hamm has also again increased the operator comfort: The cab offers the operator over 20% more tread, around 30% increased space, and numerous storage compartments. Furthermore, the vibrations and the noise level in the cab are significantly reduced thanks to the materials and design. A comfortable heating and air-conditioning system, the Easy Drive operating concept, the innovative seat operating unit, the comfortable steering as well as modern ventilation round off the comfort offered by well-conceived construction machinery.

Equipped for the digital construction site
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.

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Content produced in association with Wirtgen Group

The machines have a novel design with no rear axle, a configuration that allows a low mounted engine, lowering the centre of gravity and improving stability even on slopes. The design also allows for good operator visibility as well as high manoeuvrability for the machines.

In the cabs the machines have adjustable seats and vibration-isolated platforms, a robust dashboard and a multi-functional control display.

The drums are designed to be maintenance-free as part of Ammann’s ECOdrop philosophy, reducing the cost of ownership.