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.

While I can’t tell you exactly when a DPF on your job site will need service, I do have some good news from our testing and early IT4 performance data that shows how this required service doesn’t necessarily come around on a tightly defined schedule.

Ash removal is condition based, not hour based. The time when this service should actually take place will be flagged by your machine with a dash indicator or as required by diagnostic codes. Our initial test results indicate that ash service intervals could extend beyond minimum levels of 3,000 hours for engines below 175 hp (130 kW) or 4,500 hours for John Deere engines above 175 hp (130 kW). Actual intervals will be a result of your regular maintenance practices, such as the lube oil used, and specific machine application.

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