HAMM high-performance single-drum rollers: More power, more options, more models
At Bauma China 2018, Wirtgen China presents an enlarged program of HAMM single-drum rollers manufactured in Langfang. A new 25 t model, type 325, will complement the portfolio and will be on display for the first time in Shanghai. Accordingly, the range will encompass seven models weighing 18 t, 20 t, 22t or 25 t. All of them are equipped with a powerful 164 kW engine corresponding to the emission standard CN stage 3. They convince operators with high compaction rates and a large drum width of 2,220 mm. Moreover, there are several options available, so customers can order machines that perfectly match their requirements. Owners benefit from competitive prices, low fuel consumption and low maintenance cost. The HAMM compactors can be used for a wide range of application in stabilization and earthworks, compacting different types of material.
German-Chinese co-production made in Langfang
The HAMM single-drum compactors 318, 320, 322 and 325 were developed exclusively for the Chinese market. Since 2014, the series has been produced in Wirtgen China’s Langfang factory. An engineering team from Germany and China tailored the compactors perfectly to the needs of the Chinese market, combined with numerous strong features that are typical of HAMM, such as the compact design, unique visibility, first-class handling and compaction performance. The compactors stand out for their modern technology, high productivity and quality compaction. They guarantee German quality standards at a very attractive price-performance ratio. On top HAMM offers several options and further developments.
Ergonomic operator platform for higher productivity
For a high degree of comfort and safety, the HAMM compactors come with an ergonomically designed operator platform and operator seat for complete all-round visibility. Thus the operator has a clear and unrestricted view of all areas around the machine for more safety on the building site. Thanks to its design, the machine features unrivaled visibility particularly to the rear, the tires and surroundings. The spacious platform provides ample legroom and allows individual adjustment of seat and steering wheel. The compactors can be equipped with a cabin , with heating and air conditioning as option or is alternatively available with a canopy. The user-friendly operating panel features a clearly designed information display and intuitive operation with international symbols. Displays for engine RPM and drive speed are standard equipment for China, the HAMM compaction meter can be added optionally.
Reliable engine and unique cooling system
For exceptional compaction performance, all seven machine models have a highly efficient Dongfeng Cummins engine type QSB6.7220C on board. Its rated output is 164 kW. Fuel consumption is low as the engine belongs to the latest generation. Customers benefit from a well-established service network throughout China. An innovative cooling system – in which the cooling air is fed in from the rear part of the engine hood – provides for an optimized air supply, an increased lifespan of the power packs and a reduction in noise emissions.
Powerful drive system
The HAMM compactors are equipped with a 3-point articulated joint that offers outstanding driving and steering characteristics. Using 3 joints, the HAMM articulated joint is unique on the market. It guarantees unsurpassed directional stability and driving comfort. Even at full steering angle, the chassis design ensures homogeneous weight distribution on drum and wheels. Moreover, the compactors can effectively absorb impacts, also in uneven terrain. Tilting when driving along curves is no longer an issue, either. The powerful drive system features an original Rexroth hydraulics system. A hydraulic flow divider is standard in all models – another unique feature for the Chinese market. It guarantees an excellent climbing ability via a self-locking differential: the HAMM compactors impress with their gradeability of up to 55% on soft soil. Their performance far exceeds that of any other single-drum roller made in China.
The Langfang-made HAMM compactors also stand out because they have an engine freely accessible from all sides. Thus the service is fast and uncomplicated. The hood folds to the rear and is hardly higher than the operator’s cabin, which allows service work to be carried out in low areas or workshops with low ceilings as well. The backup lights of the machine light up the engine compartment, thus facilitating examination in any lighting conditions. Besides, thanks to the German-Chinese design including the usage of locally produced parts, customers benefit from fast and reliable spare parts and service support.
More drum options for wider application fields
The Chinese HAMM single-drum rollers can be equipped with a smooth drum or padfoot drum ("P" models) . Customers who need both types of drum can use the optional padfoot shell kit, consisting of three segments. It enables easy conversion of the smooth drum to a padfoot drum, making it ready to compact cohesive soil.
Models successfully launched in Chinese market
The feedback for the models 318, 320 and 322 has been very positive from all parts of the country. Several Chinese companies have already experienced the advantages of the rollers in various applications.
In general, the operators found the single-drum rollers very easy to handle and felt comfortable on the operator platform as it allowed them to individually adjust the seat, the steering column and the steering wheel.Service engineers complimented HAMM on the ample space for easy access to all service points and that these points are arranged clearly, thereby helping to avoid common errors. Moreover, customers are happy with low fuel consumption and spare parts cost. Last but not least, the customers noticed that the Wirtgen China concept of German-Chinese design makes sure that the machines match local needs, offer high quality and top performance, as well as ensuring fast and reliable support and spare parts service.