Hamm’s new HD+ i-series line of Tier 4 interim-compliant tandem asphalt compactors include the 7-ton Hamm HD+ 70i VT, combining smooth drum with pneumatic tires; the 11.5-ton HD+ 110i VO Oscillation roller, combining standard vibration with exclusive Hamm Oscillation compaction; the 13.2-ton HD+ 120i VV HF, a high-frequency roller; and the 15.4-ton HD+ 140i VV, with standard vibration.
In addition, the HD+120i VV HF has the option of having the HCQ (Hamm Compaction Quality) intelligent compaction system. This VEDA-compatible system will monitor and record the number of passes over a given area, the stiffness of the material, and the temperature of the mix. Featuring dual screen technology, the Hamm system can be operational within five minutes on the job and the PC and receiver can be interchanged from one roller to another for maximum utilization.
Other new HD+ tandem rollers include the HD+ 80i weighing 8 tons, and the HD+ 90i weighing 10 tons. Both models offer a variety of different options, including conventional vibration, high frequency compaction, exclusive Hamm Oscillation compaction, split drums, and a smooth drum/pneumatic combination option.
Hamm’s exclusive Hammtronic machine management system now is included as a standard feature. The 74 hp engines used in the HD+ 70i and HD+ 80i already comply with the requirements of the forthcoming even-more-stringent Tier 4 final emissions regulations.
All rollers in this model series will be factory equipped with the Hammtronic machine management system as standard, optimizing performance while minimizing fuel consumption by operating the engine in the optimum load range at all times. In addition, the Hammtronic system also ensures even, high-quality compaction through control of the traction and vibration drives.
"These machines have been developed specifically to meet the criteria of the North American contractor," said Richard Evans, vice president of sales for Hamm.
Performance options, operator comfort, visibility and ease of control are unsurpassed by any model. The fully adjustable seat – with integral control levers – moves together with the operator’s console completely from side to side. and swivels through 180 degrees, for much better control and visibility, particularly to the drum edges.
"In addition, if you are a big guy, the steering column tilts up out of the way when you are climbing in or out of the seat," Evans said. "Also, the drive levers are wide, so you have plenty of room for your legs."
The HD+ features additional operator conveniences such as large cup holders, and an adapter to enable the operator to charge a phone, or even plug in a refrigerator, which can be stored on the large cooler tray.
The HD+ models feature Hammtronic operation as standard, providing engine management control for considerable fuel savings, programmable speed control, and on most models, the ability to independently control vibration frequency and amplitude to either drum.
Drum-mounted halogen lights are standard for improved illumination to all four drum edges, and either halogen or xenon light options are available to mount to the ROPS structure.
Unlike some competing machines, which require physical movement of weights on the side of each drum, which is hard enough to do in the daylight, let alone at night when most of the major highway work is done, amplitude and frequency adjustment on the HD+ models can be done by the operator on the control panel.
Also unique is the HD+ Series' offset capability, a standard feature, which on the HD+ models is close to 7 in. "We can roll around a curb without risking damage by the rear drum and now, with the extra 3-in. offset over the older model, we now have enough for a good roller operator to pinch a joint," Evans said.
That means an operator can keep the front drum on the hot material and offset the rear drum so it can bridge between the pre-compacted hot material and the cold joint, potentially saving a pass for higher productivity, and avoiding travel in the other lane of traffic, for enhanced safety. This capability is not available on some competing models.
