The Caterpillar 775G dump truck is widely used on mine sites across the world. Built with a Caterpillar C27 diesel engine, the Cat 775G has improved fuel efficiency and emits up to 9% less CO2 emissions than the 775F model. This high-performing off-road dump truck operates at 121dBA (unattenuated) with increased speeds and enhanced traction control. Reducing the dynamic machine noise output provides further effective operation of the Cat 775G; by facilitating an increase in operating hours and resource recovery, carbon emissions and stakeholder satisfaction.
Minetek were commissioned to design and manufacture a turn-key sound attenuation solution for the Caterpillar 775G dump truck. The goal of this project was to reduce the machine’s operating noise down to the strict mine noise level, without compromising its operating capacity or adding excess weight to the machine. This sound reduction solution was also designed to provide easy access for routine maintenance and servicing.
Caterpillar machine noise reduction
Sound testing determined the Cat 775G emitted a Sound Power Level (SWL) of 121dBA. Assuming ideal weather conditions (no temperature inversion later, no wind, fog etc) and hemispherical radiation (Q=2), this machine can now operate at a distance of 3000m to the receiver, at this noise level. With Minetek’s turn-key sound attenuation package installed, the Caterpillar 775G now operates at an amazingly low noise output of 113dBA.
This 8dBA sound reduction enables the Caterpillar 775G to operate >50% closer to the sound receiver at a distance of 1512m. Minetek’s sound attenuation solutions set an industry benchmark and noise suppression at the source is now best practice.
Minetek is internationally recognised among OEMs and mining operators as a producer of the world’s quietest mining machinery. Our sound attenuation solutions are engineered to maintain productivity and minimise the impact on operators and maintenance teams. Minetek’s modular sound suppression kits are available for mining trucks, excavators, dozers, loaders and drills, with certified install teams available globally.
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