Komatsu launches pair of articulated dump trucks

Komatsu HM400-5

Komatsu has released two new articulated dump trucks, the HM300-5 and HM400-5, which incorporate advanced Tier 4 Final engines that can reduce emissions by up to 90 per cent when compared with predecessors.

The HM300-5 has a 28t capacity, while the slightly larger HM400-5 truck has a 40t capacity. Advanced electronic control systems and sensors are incorporated for increased efficiency of operations, superior control and faster processing of signals.

Data collected by the trucks can be managed remotely via Komatsu’s Komtrax system, allowing operators and fleet managers easier access to maintenance information.

Both trucks feature Tier 4 emissions certification from the US-based Environmental Protection Agency (EPA) with engine capabilities that can cut nitrous oxide (NOx) and particulate matter emissions by up to 90 per cent compared to Tier 3 equivalents.

“Because of this integrated design approach, we have been able to achieve further reductions in fuel consumption with these new trucks,” said Richard Feehely, Komatsu Australia national business manager, quarries.

“These include the use of variable displacement piston pumps that use engine power only as needed to eliminate unnecessary PTO inefficiencies, along with design improvements to the drive axles and transmission systems that reduce parasitic driveline losses.”

In addition to possessing more economically efficient engines, the trucks feature advanced transmission systems that include electronically controlled  countershaft transmission featuring electronic clutch modulation — a feature typically found on larger mining trucks — and Komatsu’s in-house traction control system, KTCS.

“KTCS, which we have derived from our extensive experience in traction control systems in dozers and rigid dump trucks, was developed by Komatsu to ensure maximum machine performance in soft and slippery ground conditions,” said Feehely.

“This system, which is automatically activated and deactivated, monitors wheel speeds on the front and middle axles, and if it detects wheel slip, will automatically engage the inter-axle lock to improve machine performance.

“If the machine continues to detect wheel slip, it will brake the wheel that slip was detected on, continually monitoring wheel speeds and engaging the brakes as necessary,” he said.

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