John Deere 7780 ProDrive Chopping Hay June 18, 2015 by farmlifetoday bigtractorpowerThu, June 18, 2015 3:22amURL:Embed:John Deere 7780 ProDrive chopping hay into a Meyer Forage Box mounted on a Sterling Truck. Follow Lamb Farms @ https://www.facebook.com/pages/Lamb-Farms-Inc/226927684016503