Before Hydraulics: 1950s Scrapers - Caterpillar vs. LeTourneau

In 1937, R.G. LeTourneau walked into Caterpillar's headquarters with a proposal for a self-propelled rubber-tired scraper. Caterpillar rejected it. So LeTourneau built it himself, called it the Tournapull, and dominated the earthmoving market for the next decade — producing 70% of all Allied earthmoving equipment in World War II. ☕ Support this channel: https://buymeacoffee.com/construction... By 1944, Caterpillar severed all ties with LeTourneau and scrambled to design its own scrapers from scratch. What followed was a fifteen-year arms race between two companies on opposite sides of the Illinois River in Peoria, fighting over who would control the future of earthmoving. One bet everything on electric power. The other bet everything on hydraulics. And the man who lost that war invented the technology that powers every mining truck on earth today. ⏱️ TIMESTAMPS 0:00 The word you couldn't say around LeTourneau 7:11 World War II — 70% of all Allied earthmoving equipment 18:03 The $31 million sale to Westinghouse 29:25 Caterpillar's hydraulic revolution (1962) 36:47 The final twist — both companies reunited under Komatsu 📚 SOURCES AND FURTHER READING This documentary draws on patent records from the United States Patent and Trademark Office, Caterpillar corporate history archives, the LeTourneau University Margaret Estes Library, articles from Contractor Magazine NZ by Charles Fairbairn and Richard Campbell, HCEA Equipment Echoes publications, OEM Off-Highway historical features, William Haycraft's "Yellow Steel: The Story of the Earthmoving Equipment Industry," Eric Orlemann's books on LeTourneau and Caterpillar equipment, R.G. LeTourneau's autobiography "Mover of Men and Mountains," ACMOC forum discussions, and Heavy Equipment Forums operator accounts. ⚖️ FAIR USE NOTICE This video uses historical photographs, archival footage, and public domain materials for the purposes of education, commentary, and historical documentation under the Fair Use doctrine (17 U.S.C. § 107). No copyright infringement is intended. All third-party content is used in a transformative context to support factual narration about construction equipment history. #BeforeHydraulics #Caterpillar #LeTourneau #Scraper #ConstructionHistory #HeavyEquipment #Tournapull #CaterpillarVsLeTourneau #VintageEquipment #EarthmovingHistory #MotorScraper #CableControl #HydraulicScraper #IndustrialHistory #ConstructionLegends 🔔 SUBSCRIBE for more construction history documentaries:    / @constructionlegends