The Deere high horsepower tractors use CEGR and DEF technology to meet Tier IVb emission levels. Using two systems to accomplish what New Holland accomplishes with DEF technology only greatly increases complexity and cost for the owner throughout the life of the tractor as well as higher operating costs on fuel. The CEGR technology adds a second turbo charger (NH uses one, Deere uses compound (2) turbo chargers), a Diesel Oxidation Catalyst (non on New Holland tractors), a Diesel Particulate Filter (none on New Holland tractors), and an Exhaust Gas Cooler (New Holland has none) in order to cool the recirculated air and a larger Air-To-Air Intercooler than New Holland uses because the hot recirculated air has to be cooled.
The DEF equipment on the Deere tractor has similar components as New Holland’s DEF equipment. All of the Deere CEGR equipment is ‘extra’ machinery that the New Holland owner doesn’t need to buy or maintain:
One might ask why New Holland uses CEGR technology on smaller tractors if it isn’t a good idea? Fact is, CEGR has benefits in small engine applications simply because small engines use a fraction of the air that larger tractors use and typically, smaller tractors don’t have constant high engine loads typical of high horsepower tractors’ applications. The lower combustion temperatures needed for CEGR to meet emission levels occurs more naturally in the smaller tractor.
The use of dual technologies (DEF plus CEGR) in high horsepower Deere tractors presents a huge liability for the owner throughout the life of the tractor that the New Holland single technology (DEF only) doesn’t provide to the New Holland owner. Deere points out that the DEF use will be lower because of the dual technology. While this remains to be seen in real world use, we would point out that diesel currently sells for about $4.00 per gallon whereas our Open House price on DEF was $1.39 per gallon.
Nebraska tests on Deere’s Tier IVa tractors showed higher diesel use than the New Holland Tier Iva tractors and the Deere tractors didn’t meet Deere’s advertised horsepower levels OR torque rise. See Nebraska tests 1990 and 1991 attached:
031814 nebraska tests
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