bigtractorpower — Big JOHN DEERE Tractors on the Move in Fall Tillage — In this video viewers spend time with 6 big JOHN DEERE tractors subsoiling the ground with 7 shank JOHN DEERE 915 V-Rippers working 18 inches deep . Watch for 2 440 hp JOHN DEERE 9R 440s, , 2 410 hp 9410Rs and 2 340 hp JOHN DEERE 8R 340 tractors.