High Quality Content by WIKIPEDIA articles! The Caterpillar 797 is a series of off-highway, ultra class, two-axle, mechanical powertrain haul trucks developed and manufactured in the United States by Caterpillar Inc. specifically for high production mining and heavy-duty construction applications world-wide. In production since 1998, the 797 series represents Caterpillar’s largest, highest capacity haul trucks. The current, third- generation model, the 797F, offers one of the largest haul truck payload capacities in the world, up to 400 short tons and is the world's largest, highest payload capacity, mechanical drive haul truck. In 1997, Caterpillar decided to begin development of a 360 short tons payload capacity haul truck to meet the demand from large-scale mine operators wanting to reduce operating costs at mines using 80 to 90 short tons per pass shovels

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