The HD+ series of tandem rollers from Hamm has expanded with six new roller models for asphalt construction, offering operating weights of seven and eight tons. HD+ 70 and HD+ 80 models meet the requirements of exhaust emissions category UN ECE R96 (EPA Tier 3), while the company fits its HD+ 70i and HD+ 80i (EPA Tier 4/EU Stage V) models with its Easy Drive operating concept as standard. As with Hamm’s other Tier 4/Stage V machines from the HD+ series, these are “digital ready” with the necessary interfaces for use with digital applications.
The new HD+ 70 and HD+ 80 models have a 55.4 kW engine. These tandem rollers are available as vibration, oscillation or combination rollers. They provide the same driving and handling characteristics as the heavier rollers in this series.
The digital-ready machines are equipped with the interfaces required to connect telematics systems and fleet management systems, as well as Smart Doc, the app for compaction control and compaction documentation. In the HD+ series, all models with EPA Tier 4/EU Stage V-compliant engines, including the HD+ 70i and HD+ 80i, will now feature such interfaces.
The free Smart Doc app, available for the HD+ series, uses Bluetooth to transmit the roller’s relevant operating data via an interface to a smartphone or tablet. The operator can see on the end device how the compaction is progressing in real time. In the process, the app links the machine data with the GNSS position.
The Smart Receiver, which is adjusted specifically to the system, provides precise location information. The Smart Doc app also uses the data to produce compaction reports in PDF format. This makes it suitable for self-monitoring as well as for continuous compaction control (CCC). Beginning this fall, Smart Doc will also be able to bundle together the data from every roller on a single construction site.