Ammann's slimmed trench roller accesses tighter spaces

Ammann's new slimmed-down trench roller is easy to manoeuvre and can fit into tighter spaces than its predecessor. The ARR 1575-2 trench roller has a width of 600 millimetres (23.6 inches), compared with the previous 640 millimetres (25.2 inches).

"That size reduction might not sound like a lot, but it makes a big difference," says Lukas Jakl, technical support engineer at Ammann. "It fits more places, of course. Just as important is the additional manoeuvrability the narrower frame brings."

Precise and smooth steering

An additional mobility factor, beyond the narrower frame, is a central steering joint with two hydraulic cylinders that distribute force equally across the machine. This is designed to make steering precise and smooth in both steering directions. When operating in more open spaces, drum extension kits can increase the working width up to 860 millimetres (33.9 inches) and boost the surface compaction output.

Compaction power

"This Ammann trench roller does more than fit into tight spaces," says Jakl. "It supplies high-quality compaction that can be customized to the project at hand."

The vibratory system uses dual eccentric shafts per drum for precise energy transmission to the compacted material. This improves performance on thinner layers, reduces friction, and increases durability by decreasing drum shell wear. This technology provides multiple benefits. First, it is more adaptable to material sensitivity and layer thickness. It also reduces friction between the drum shell and materials, which lessens wear and extends life.

Another essential element is the two-stage vibratory mechanism, equipped with adjustable eccentric weights. This enables compaction settings with amplitude of 0.6 millimetres (0.024 inches) or 1.2 millimetres (0.047 inches); centrifugal force of 34kN or 72kN; and frequency of 40 Hz. This allows the operator to choose settings based on materials and depth. All these features ensure high compaction quality and help the crew reach density targets in the fewest passes possible.

Constant contact

A unique oscillation mechanism differentiates the Ammann ARR 1575-2 from other machines on the market, according to the company. The mechanism works with the articulation joint to maximize stability on uneven terrain. Front and rear frames are able to move independently, which ensures consistent ground contact and improves compaction, stability, and traction.

Safe operation

Ammann has developed the safest and most technologically advanced remote-control system, the company says. It protects the operator, other workers, and the machine itself. The machine and remote control must be in direct sight lines to each other for the roller to operate. In addition, the control system distinguishes between two operation zones — a "working zone" and "safety zone." The machine immediately stops if it enters a "safety zone," a specified area that is too close to the operator.

Charging methods

The remote control is equipped with an exchangeable battery that can either be charged on-board or externally. For on-board charging, the operator can connect the remote control to the machine via a cable and charge the battery directly, even when the machine is working. The battery can also be removed from the remote and charged externally. A charge lasts for at least 16 hours of intense machine operation.

Other key features:

• Durability: A fully welded frame, combined with a DCPD hood, protects key components. Drum shells and the vibratory housing mechanism are cast for improved durability and wear resistance.
• Accessibility: Both hoods open widely to the centre of the machine, making it easy to access all main components. This new configuration simplifies the operator's daily maintenance tasks.
• Sustainability: Ammann machines are designed according to the ECOdrop philosophy, which utilises advanced engineering to deliver maintenance-free solutions, minimize fluid usage, and maximize access to service and maintenance points. In addition, solid construction extends machine life.
• Maintenance: The ARR 1575-2 is equipped with a maintenance-free articulation joint that employs a special bearing, which is well-greased and highly protected. The engine location and wide-opening hood make daily maintenance points and filters easy to reach and fast to change.
• Compaction technology: The trench roller can utilize optional Ammann Compaction Expert (ACE) technology to increase productivity during the compaction process. ACE is a relative compaction measuring device that provides continuous information about compaction levels and displays progress in real time.
• Smart digitalization: The Ammann ServiceLink telematics system provides information on machine position, working hours, and battery voltage. ServiceLink can manage single machines or entire fleets.