"The Man Who Built the 4020 - The Harold Brock Story"

Harold Brock — The Man Who Changed the Tractor Twice | Legendary Tractors Documentary Description: In this Legendary Tractors documentary, we explore the life and legacy of Harold L. Brock — one of the most influential, yet least-known figures in American tractor history. From entering Henry Ford’s Trade School at age 15, to helping engineer the Ford 9N, to warning Ford about the Select-O-Speed testing issues, to ultimately leading the design team behind the John Deere 4020, Harold Brock changed farming not once… but twice. This video explores: • How Ford and Ferguson’s handshake agreement shaped the 9N • Why the Select-O-Speed transmission struggled — and how Brock tried to prevent it • The Ford 6000 recall and aftermath • Brock’s move to John Deere and the creation of the legendary 4020 • His later career building Hawkeye Community College • His recognition with the ASABE McCormick–Case Award If you enjoy the brochures shown in this video, visit Home | Legendary Tractors to download high-quality PDF scans used in the episode. Your support helps preserve tractor history and keeps the channel going. LegendaryTractors.net — A home for classic tractor literature. Thank you for watching Legendary Tractors — honoring the machines, and the people behind them. #HaroldBrock #LegendaryTractors #Ford9N #FordPowermaster #SelectOSpeed #JohnDeere4020 #TractorHistory #FarmHeritage #ClassicTractors #FordTractors #JohnDeere #Deere4020 #Ford6000 #AgricultureHistory 🚜 More Legendary Tractors videos: ➜   / @legendarytractors   👍 If you enjoyed this video, please like, comment, and subscribe for more deep dives into the machines that shaped farming history. Brochures available at Home | Legendary Tractors