John Deere’s D-Series Motor Graders (Circle 909) have been updated with several enhancements that deliver a significant boost in productivity. These improvements include a midmount scarifier for the 670D, 672D, 770D and 772D machines; an integrated grade control package that will save installation time and provide a more professional integration for the entire D-Series line; and for all-wheel-drive machines, a new low-speed precision mode and improved steering.