April 20, 2012
This excerpt was originally posted on the John Deere, Straightforward Blog April 12, 2012. You can view the original post here.
We are excited to welcome four new models from our K-Series crawler dozer line to John Deere’s growing family of machines certified to U.S. EPA Interim Tier 4 (IT4) emissions requirements. A John Deere PowerTech 6.8L (700K, 750K) or 4.5L (550K, 650K) IT4 diesel engine provides an increase in horsepower and overall tractor weight, providing more productive machines.
Both engines meet 2012 EPA emissions requirements by utilizing the field-proven technology of cooled EGRwith exhaust filters. The engine’s diesel particulate filters are cleaned automatically during routine operation, eliminating the need to idle down for maintenance and increasing overall machine productivity. In addition, filter access is easy, should it need servicing.