In Pictures: Caterpillar's Largest Underground Loader Yet Uses Diesel-Electric Drive Tech

Heavy machinery like the R3200 XE reflects the rugged conditions of underground mining operations.

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Underground loaders must operate efficiently in confined, enclosed spaces like this industrial hall.

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Diesel-electric drive adapts technology pioneered by locomotives more than a century ago.

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Caterpillar says the R3200 XE delivers 28% more tons per hour than its predecessor.

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The 25-ton-payload loader is designed for demanding material-handling duties.

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Mining haulage equipment continues to evolve toward greater fuel efficiency and productivity.

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The R3200 XE pairs an 18.1-liter Tier 5 diesel generator with electric drive.

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Caterpillar positions the loader as its largest load-haul-dump machine to date.

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Heavy equipment manufacturers are under pressure to cut emissions without sacrificing output.

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