Equipment World Digital Magazine
Issue link: http://read.dmtmag.com/i/605412
BOMAG Tier 4 Final BW11RH-5 BOMAG's Tier 4 Final BW11RH-5 pneumatic roller is designed for asphalt compaction work on highways, in addition to chip and seal work. The machine features a dramatic redesign that provides excellent visibility. Enhancing that visibility, and repre- senting the biggest design change, is the reversal of the engine and ballast placements. They are essentially reversed from the previous design, with the Kubota engine now posi- tioned in the back, and the water- or sand-fillable ballast compartment placed in front. While the unit has a more contoured and sloping hood, the placement of the lower ballast compartment in the front line of site gives the operator a drastic field of vision improvement. Switching the engine and ballast positions also reversed the offset pneumatic tire configu- ration, moving the set of five tires to the front, and the set of four to the back. Other design changes with the cab option are dual cab entry with doors on both sides, a swivel seat and a mini control knob steering wheel. This seat allows the operator to move for better views when needed and the smaller steering wheel removes both a physical (when entering and exiting the cab) and visual obstruction with- out affecting control. With the new engine design comes easier main- tenance. The lower profile places the engine lower to the ground, so operators can stand while work- ing on it. The polymer composite hood, while reducing weight, also offers sound reducing insulation. Other features include brakes that automatically apply when the engine shuts down or with loss of transmis- sion system hydraulic pressure, a three-speed hydrostatic transmission, 10-foot inside turning radius via 35-degree centerpoint articulation and 10-degrees oscillation. December 2015 | EquipmentWorld.com 36 highway contractor | continued ROLLERS/COMPACTORS Atlas Copco Dyn@Lyzer Atlas Copco Dyn@Lyzer intelligent compaction sys- tem offers a touchscreen tablet interface that is wireless and has a 12-hour battery life. Atlas Copco's CC2200 through CC6200 asphalt rollers and their CA2500 through CA6500 soil rollers can be outfitted with the system. The company's dealers also are providing free training for contractors. The system provides real-time stiffness measurements of soil and asphalt via a drum- mounted accelerometer, while front-and rear-mounted sensors provide asphalt temperature readings that help in providing consistent stiffness measurements. Pass counts also are measured. The system keeps up with the number of completed passes via GPS and cross- references this information with how loose the material is, which helps determine when compaction is com- plete. The operator is alerted at that point, which in turn minimizes over compaction. Data collected can be saved and used for analysis later, or for Federal High- way Administration inspections. Atlas Copco Dynapac CC1300 The Atlas Copco Dynapac CC1300 articulated compact tandem roller comes in a dual-steel vibratory drum configuration (front and back), or a combination option of one vibratory drum and four rubber tires. In addition to being used for asphalt compaction, the 45-horsepower CC1300 can also be used for compacting sub-bases and base courses. The rollers feature water tanks made of corrosion-resistant recyclable polyethylene plastic. They also have three separate filters to prevent clogging in the sprinkler nozzles, and the sprinkler system can be drained without the use of special tools. Operators can compact materials close to high curbs because of the high clearance of the drum's edges. On the combination models, the rubber tires are driven in pairs by separate drive motors, a feature the company said cuts down on marring during sharp turns on fresh asphalt. The machine offers a sideways sliding seat and dual front and reverse controls.