Better Fuel Economy For Deere 9.0L Tier 3 Diesel

Posted on August 29, 2005
With the launch of its new 8030 agricultural tractors last week, John Deere has fired the first salvo in the off-highway Tier 3 fuel economy wars. While early in the year, many diesel engine manufacturers were positioning their Tier 3 diesels as “equivalent to Tier 2” in terms of fuel economy, Deere has now said, on the record, that its new PowerTech Plus 9.0 liter diesel, in the 8030 tractors, will deliver anywhere from 2 percent to over 10 percent better fuel economy.

With Tier 3 off-highway regulations starting for diesel engines from 175 hp to 750 hp in January, this is an important announcement. It is also important in that it begins to quantify the mantra of integrated drivetrains that many have been preaching as the best route to meet Tier 3 and Tier 4 regulations.

Far from an across the board declaration of engine fuel economy, Deere was careful to point out that the fuel economy numbers were for this specific engine, in these tractors. And the increase in fuel efficiency came not only from the engine, but from a new engine cooling scheme, electronic control system, the introduction of an IVT (what others call CVT) transmission into these tractors, as well as other horsepower consuming reductions throughout the tractor. Deere did not say how much each of these factors contributed to the increased fuel efficiency.

For the record, Deere said its 8030 tractor, with the 9.0L than its Tier 2 predecessors diesel and a powershift transmission will deliver 2 percent to 5 percent better fuel economy at loads from 15 to 90 percent. However, Deere said the 8030 tractor with an IVT transmission picks up an additional 5 to 10 percent better fuel economy at 15 to 35 percent load; 3 to 5 percent at 65 to 75 percent load, and up to three percent at 80 to 90 percent load. A more complete look at Deere’s new 8030 tractors will be published in the October issue of Diesel Progress.