Crawler Tractor Ups Production, Lowers Emissions

Liebherr’s 50-metric-ton (mt) PR 766 crawler tractor was designed for power, low emissions, efficiency, driver comfort, and durability, the company reported. With operating weights of between 46,200 kilograms (kg) and 54,200 kg, the tractor is the successor model to the PR 764. It is powered by a 310-kilowatt (422-horsepower) 8-cylinder V-engine.

The diesel unit in the PR 766 complies with Stage IV/Tier 4 emission standards, Liebherr reported. An optimized combustion process minimizes the particles while they are still inside the engine. The exhaust gas after treatment concept uses selective catalytic reduction. As a result, the new Liebherr diesel engines surpass Stage IV/Tier 4 emission standards without the use of a diesel particulate filter.

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