Volvo DD30B, DD35B Rollers

The DD30B and DD35B double-drum asphalt compactors, with drum widths of 49 and 54 inches and standard operating weights of 6,839 and 8,185 pounds, respectively, are for commercial and residential site-development work. The rollers have 10 degrees of oscillation and 30 degrees of frame articulation in each direction, and feature the Volvo TwinLock traction-control-and-torque-transfer system, which is designed to minimize drum slippage on steep inclines and slippery surfaces. Using a 49.6-horsepower Tier 4-F engine, the DD30B and DD35B are up to 20 percent more fuel efficient than predecessor models, says Volvo.

According to Volvo, fuel efficiency is further enhanced with the optional auto-idle feature, which reduces engine speed when controls are inactive for 5 seconds. An auto-vibration feature automatically engages vibratory action when the machine is shifted from neutral, and the system automatically disengages vibration when shifted to neutral, thus preventing over-compaction, says the company, while also simplifying machine operation.

To optimize finished-pavement quality, says Volvo, drum edges are chamfered and rounded to avoid marking the mat. The DD30B and DD35B also feature an automatic, variable-interval water-spraying system that is designed to prevent material pickup by providing uniform drum coverage and variable flow. The large 79-gallon water tank’s low positioning gives the machine a low center of gravity for enhanced stability, says the company, and the tank can be refilled from ground level.

The new models also feature a “pillar-less” forward view that provides unobstructed sightlines down to the drum and spray bars, says Volvo, as well as a sloping engine hood that facilitates rearward visibility. Visibility is further improved, says the company, by means of sliding operator’s seat that can adjusted to an optimal position. Ergonomic controls are configured in the same layout as larger Volvo double-drum models, says the company.

The hinged hood allows for ground-level access to the engine and hydraulic components, and, according to Volvo, passive regeneration of the diesel particulate filter requires no daily input, and parked-service regeneration is required only at 500-hour intervals. An optional foldable ROPS canopy can be collapsed without using special tools to facilitate machine transport

The DD30B and DD35B are backed by the Volvo Lifetime Frame and Structure Warranty, which covers the frame and articulation joint, says Volvo, “for the entirety of the initial period of ownership.”