New tandem asphalt rollers from Dynapac

Updated Oct 6, 2010

Dynapac introduces four tandem asphalt compaction rollers for quality asphalt finish, efficiency in operation and ease of service, extending the range in the 8-12t class to six models. 

A new 8-10t class asphalt roller, the Dynapac CC224HF, and a split-drum version, the CC234HF, together with 10-12t models Dynapac CC324HF and split drum version CC334HF are introduced by Dynapac, designed to meet the needs of contractors and rental companies worldwide. 

The new rollers have been designed to achieve high quality surface finishes offering operational features such as “soft” starting and stopping to prevent bowing or cracking in the asphalt layers; allowing even unskilled roller operators to start and stop without leaving marks. As a safety feature, the machinewill drop out of the “soft” mode and brake immediately if the lever is moved quickly, signaling the need for an emergency stop. 

New features simplify and speed servicing to guarantee maximum availability. Use of a double pump vibration system for example, eliminates the need for a vibration valve, making the system more efficient, aiding serviving and reducing fuel consumption. 

The new Dynapac models are powered by a Cummins QSB 3.3 T3 water-cooled turbo engine with after  cooler and rated at 80 hp at 2200 rpm. Also available is a 99 hp engine. The Dynapac automatic engine idling system cuts the idling speed after 10 seconds at full rpm in neutral. This further reduces emissions, provides additional fuel savings and minimizes noise. 

Operator efficiency 

High quality compaction is enhanced by optimizing the ergonomics, ensuring that operators have contiuous visibility of the operation and easy access to the controls. The machines feature over three feet visibility and full view over drum surfaces, drum edge and sprinkler nozzles. The clear control panels on the new Dynapac models provide operators the information they need. All the gauges are displayed- water, fuel, voltage and number of hours-and the operator can change between menus at the touch of a button. With the engine relocated on the rear module, noise levels are reduced for the operator and engine heat is removed from the operator’s platform. It also gives easy serviceability with both engine and hydraulics fully accessible through the large hoods. 

Many of the enhancements bring environmental benefits through reduced consumption and quieer operation. Efficiency enhancements have saved some 11 hp in the operation with consequent improvements in the running cost and noise. 

Compaction Controls  

The optional Dynapac Compaction Analyzer for Asphlat (DCA-A) provides accurate time information about the rolling, allowing the next pass to be planned, taking into account the asphalt temperature of each area. Tracking the number of passes makes it easy for the operator to maintain control of the pattern and achieve the best results. better planning of the rolling operation also ensures jobs are carried out more efficiently, resulting in using less fuel. Further information can be provided through the optional Dynapac Compaction Analyzer software, which indicates the temperature in front of and behind the roller as well as the number of passes made on each section of the asphalt, for optimum compaction.

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