John Deere COMBINE: 3300 John Deere COMBINE: 4400 John Deere COMBINE: 4420 (<1983) John Deere COMBINE: 6600 John Deere COMBINE: 6620 (<1983) John Deere COMBINE: 7700 John Deere COMBINE: 8820 John Deere FORAGE HARVESTER: 5200 John Deere FORAGE HARVESTER: 5400