Flexible ballasting as standard
Another feature that users have come to expect from HAMM is the flexibility in terms of ballasting: the operating weight is quickly adjustable to suit the asphalt type, layer thickness and application. Here, the HP series offers considerable latitude with its variable ballasting concept. For example, prefabricated ballast bodies made of steel or normal or heavyweight concrete can be inserted into or removed from the large ballast compartments between the wheel sets using a fork-lift truck, for example. This can be carried out in the user's workshop or on the construction site. HAMM offers various ballast body kits for this purpose allowing different weights to be achieved. Because the ballast spaces are located in the center of the machine, the weight is always evenly distributed over both axles – perfect conditions for optimum compaction quality. Additional ballasting of up to 17 t is possible, depending on the basic weight.
Highest possible operational safety included
In addition, the HP series also scores in terms of safety. Drivers can always reach the brake pedal quickly and reliably because it is an integral part of the seat-operating unit on all HP series models. This makes for the maximum possible operational safety because the brake is always easily accessible, irrespective of the seat position. This aspect is especially important particularly for heavy rollers weighing well over 20 t.
Generous tank volumes for high productivity
The new HP series pneumatic tire rollers are visually identifiable by 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 this reason alone, the rollers are already extremely productive.
Supplementary water tank: Ballasting and water reserve
HAMM also offers a supplementary water tank with a volume of 1,500 l for all HP series models. It may be used as a water reservoir for the sprinkling system, but also serves as an easily quantifiable, flexible supplementary weight. Operation of the supplementary tank is remarkably easy because it is connected to the basic water tank by means of interconnecting pipes. To facilitate fast refilling, the developers have provided a C-pipe connection to complement conventional filling. It enables the entire tank to be filled in around three minutes. A pump is also fitted to allow complete discharge.