On-Site Magazine

Articulated dump trucks

By Adam Freill   

Construction Equipment Trucks

Hyundai Construction Equipment Americas is entering the articulated dump truck market with two new models, the HA30 and HA45, targeting the 30- and 45-ton segments.

With rated payloads of 28 and 41 tons, respectively, the company views these trucks as ideal haul truck matches for its larger crawler excavators and wheeled loaders. Designed primarily for high-volume earthmoving projects, highway construction, and mine and quarry operations, the articulated haulers are engineered to provide maximum drive and traction in the worst site conditions, maintaining year-round productivity.

The trucks are built around a full-time six-wheel drive concept, with front and rear limited slip differentials and a longitudinal differential that can be manually locked, for maximum drive and traction on difficult terrain.

Featuring a compact chassis design that aids maneuverability, the trucks have a sloping rear frame and a front-mounted differential integrated into the ZF transmission, allowing for a shorter front frame section. This results in a small turning radius and outstanding stability. Self-leveling hydro-gas suspension on the front axle further supports a comfortable ride.

Tandem reduction gearboxes on the two rear axles enable maximum oscillation of the rear axles to maintain ground contact on rough terrain. The single central differential increases ground clearance beneath the truck.

The vehicles are also equipped with oil-cooled wet disc brakes and a hydraulically activated mechanical parking brake that holds the machine when stationary. The trucks are supplied with a gradient meter, with flip-over protection and a Body Over Centre of Gravity function, to assist drivers when dumping and operating on rough terrain.

The HA30 has a 22 yd3 (16.8 m3) heaped body capacity, which rises to 23.3 yd3 (17.8 m3) when fitted with a tailgate. The larger HA45 offers a 32 yd3 (24.4 m3) heaped capacity, rising to 34 yd3 (26 m3) with a tailgate. Both dump bodies can be optionally heated by the engine exhaust gases to prevent freezing and sticking of materials when operating in colder temperatures. Internal wear plates are available as an option when working in applications with heavy and hard rock.

Tier 4 Final Scania diesel engines power both trucks. The HA30 uses a five-cylinder, 9.3-liter DC9 turbocharged diesel, producing 375 hp (276 kW) and 1,876 Nm of torque. The larger HA45 uses a six-cylinder, 12.7-liter DC13 diesel engine, producing a maximum 500 hp (368 kW) and 2,476 Nm of torque.

Both engines drive through eight-speed ZF automatic transmissions. The torque converter has lock-up in all gears, reducing fuel consumption and increasing efficiency.

Hyundai’s Hi-Mate telematic monitoring system is standard, with satellite and GSM connectivity. This enables remote monitoring of productivity, fuel consumption, system warning and maintenance status, reducing unplanned downtime and improving fleet utilization.


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