Komatsu brings Tier 4 truck option

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  • Earthmovers & Exacavators

An option on the Komatsu's 930E-5 ultra-class mining truck that allows it to meet Tier 4 emissions standards is now available Down Under

Komatsu brings Tier 4 truck option
Released in Australia in 2018, the Komatsu 930E-5 has a capacity of more than 300 Metric Tonnes (330 US tons) and is powered by a high performance Cummins QSK60 Dual Stage Turbo charged engine rated at 2700Hp via a fully solid state AC electric drive system.


Komatsu has commissioned a version of its 930E-5 ultra-class mining truck that meets Tier-4 emissions regulations, which the company says will be the first Tier 4 Final version ultra-class mining truck in Australia.

Developed together with Komatsu’s engine partner Cummins, the truck incorporates an on-board treatment system that reduces particulate matter pollution by 80 per cent, compared to Tier 2 engine levels. 

The on-board after treatment system is now an option that can be incorporated into Komatsu’s 930E-5 model.

With the system in place, the truck is set to meet the most stringent emissions regulations across both North America and the European Union.

Komatsu deployed 41 new model Komatsu 930E-5 ultra-class haul trucks at BHP's new South Flank iron ore mine in the Pilbara in 2019. Check out the story here.

Komatsu National Product Manager – Mining, Jason Arthur, says the vehicle was commissioned to meet a client’s specific operational needs as well as to support its own emission reduction strategy.

"Komatsu has a strong commitment to environmental best practice, with a continuous focus on reducing our environmental impacts and our carbon footprint," Arthur says.

"Our ongoing research and development efforts include developing new products that significantly reduce fuel consumption as well as greenhouse gas emissions."

Tier 4 emission requirements are met through an advanced high-pressure fuel injection control system in the engine cylinders which treat particulate matter in a specific yet low-maintenance process.

The technology uses a selective catalytic reduction (SCR) after-treatment process to treat nitrogen oxide emissions out of the engine cylinders, which are contained within the truck’s rear-exiting exhaust system.

The SCR system comprises of an airless diesel exhaust fluid dosing system and includes a decomposition chamber with a maintenance strategy which aligns with the lifespan of the vehicle’s engine.

The result not only lowers emissions, it also increases fuel efficiency in the machines without increasing backpressure while also emitting less noise pollution than non-Tier 4 models.

"Our US-based Komatsu Engineering team became intimately involved and created a factory-engineered sound suppression solution that would meet our customer's requirements," Arthur says. 

"These factory-designed sound treatments more than halved the standard truck's emitted sound power levels, resulting in a target sound power level of less than 113 decibels.  

"Successfully achieving these sound levels were a very challenging undertaking for a large mining truck powered by an engine with an output of 2700 horsepower," he says.

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