In this video viewers will follow the evolution of the John Deere Sound-Gard tractor design seeing each large horse power row crop model produced from 1973-1994 working in the field. The video shows how the tractors gained horse power, design changes with headlight and muffler upgrades as well as the addition of front wheel assist over a 21 year period. Watch for the John Deere 4630, 4840, 4850, 4955 and 4960.
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