Latest machines offer host of benefits including easier operation and increased vibratory frequencies
AMMANN have released a new series of light tandem rollers with operating weights from 1,460kg to 1,640kg and drum widths from 820mm to 1,000mm. Designed for ease of operation, transport and maintenance, the rollers retain their ability to work with in-line or offset drum configurations, allowing compaction against curbs and other obstructions.
The new double-drum rollers are the ARX 12-2, ARX 16-2 and ARX 20-2. Also introduced is a combination version, the ARX 16-2C, which utilizes a steel drum in front and pneumatic tyres in the rear for higher machine traction and improved sealing of surfaces.
The rollers are powered by 15.6kW (21.2hp) Kubota engines that meet EU Stage V and US EPA Tier 4f emissions standards. A new vibratory circuit setting delivers expanded vibratory frequencies that facilitate quicker compaction.
‘The new setting enables vibratory frequencies to increase (3% at low frequency / 6% at high frequency),’ said Vlastimil Medek, global product strategist at Ammann. ‘Improved impact spacing also optimizes compaction quality.’
Controls are logically located and intuitive; switches for lights and vibration have been repositioned for optimal access, whilst a new armrest features an updated layout and integrated functions, including the parking brake.
‘ARX dashboards and controls are consistent with other Ammann models, making it easy for crew members to switch between machines,’ said Mr Medek. ‘This is particularly important for the rental market and when dealing with inexperienced operators.’
A new, orange safety belt aids in monitoring whether crew members are properly secured and a redesigned ROPS lock protects operators and reduces noise.
Another key improvement is effortless switching between drive modes, which in previous generations required a service technician or representative from the dealership. The modes can now be changed easily.
Soft drive allows smooth, steady adjustments to directional changes – particularly important when working on asphalt. Hard drive responds quickly to directional changes. Panic stop idles the machine if the operator makes very sudden directional changes or significantly adjusts the travel lever position.
Front and rear rubber buffers, which protect lights and scrapers, have been thickened and widened and moved to a central location. Lights are set in the machine frame for added protection, and directional and working lights have been centralized. The articulation joint lock has been redesigned and repositioned for better protection.
According to Ammann, transporting the machine has never been easier – and safer. Vibration is automatically disabled when in ‘loading’ or ‘transport’ mode. A higher central lifting point is easier to access and expanded lashing points simplify securing the machines.
Draining points have been relocated to external locations, preventing spills and reducing maintenance time by 75%, and the battery disconnect switch is at the main base of the engine for convenient access.
Other key features of the rollers include an electronic drive lever for smooth starts and stops, especially important on asphalt jobs, and a sprinkling system with multi-level filtration and large water tank for extended intervals between fillings.