Hamm’s new HP series pneumatic-tyre rollers increase productivity and offer a better operator environment, incorporating large, newly designed water tanks for fewer refilling stops and ergonomically designed cabs with high visibility – among a host of other new features.
According to the Wirtgen Group company, the new HP series models stands out thanks to the large, newly designed water tank. Like the diesel tank, it is generously dimensioned so that the machines have sufficient capacity for a full working day without stopping to refill.
For the HP series, Hamm has developed a uniform platform as the basis for all model variants in every market throughout the world. Based on this, Hamm is also continuing to offer the pneumatic-tyre rollers in different basic versions: On the one hand, the HP 180 or HP 180i model with a minimum working weight of 8t and a maximum operating weight of 18t and on the other hand, the HP 280 or HP 280i model with working weights between 10t and 28t. In doing so, Hamm provides individual markets with the respective model to suit their regional demands with regard to weight classes and equipment versions. The HP 180 and HP 280 model versions are designed for Tier 3 markets.
When it comes to the operator, the machines offer simple and intuitive operation, along with ergonomically optimised driver’s platforms. When combined with the shape of the asymmetrical frame, this results in increased visibility – for models with a cab as well as for models with ROPS.
The HP series’ powerful, hydrostatic rear-axle drive, combined with a sensitive control system, allows the right speed to be set in every working situation. This also enables the pneumatic tyre roller to perform well on gradients. The specified working speed can be conveniently adjusted using a rotary knob and intelligent drive control. This allows for smooth, even acceleration and braking, which prevents uneven compaction.
For the HP series, Hamm offers a wide range of options, meaning that the pneumatic-tyre rollers can be equipped for individual markets and application. Thermal aprons are available for all models in the HP series. The diesel-powered tyre heating is a new feature for the HP 180i and HP 280i models. The most important advantage of this is that integrated tyre heating is not operated using gas, but rather with diesel from the fuel tank. This means that the often very costly transport and the time-intensive replacement of the cylinders are eliminated.
With this solution, Hamm has also eliminated a source of danger because there are no naked flames and, as a result, no risk of ignition, when it comes into contact with oil or additives. Another permanent feature of the new tyre heating is an automatic temperature control. After preselecting a minimum and maximum value, the control maintains the temperature in this range. The driver can view the current temperature via the display. The tyre heating also does not affect the ballasting of the machines. The maximum permissible operating weight is possible, irrespective of this.
When paving difficult-to-process special asphalt, the sprinkling of the pneumatic tyres with additive is essential for high-quality compaction. By completely redesigning the additive-sprinkling system, Hamm is creating optimal prerequisites for easy handling and high level of compaction quality. The system offers several advantages, such as time saving in filling of the additive concentrate, whereby no premixing is required.
The dosage can then be regulated in different levels from the driver’s platform. The water and additive are mixed automatically, which guarantees a lasting optimal mixing ratio without demixing. The driver also always has the option to monitor the fill level via the display on the control panel. It is also possible to convert the sprinkling from water to additive at any time from the driver’s platform.