This excerpt was originally posted on the John Deere, Straightforward Blog August 22 2011. You can view the original post here.
John Deere Servicing
Many contractors who are beginning to educate themselves on the impacts of Interim Tier 4 (IT4) are expecting ash removal every 3,000 or 4,500 hours depending on engine horsepower for the diesel particulate filter (DPF) component of their non-road diesel exhaust filters. Those are the figures most often quoted in IT4 literature because those are the minimum maintenance intervals required by the U.S. EPA.