Machinery Journal

February 13, 2009 10:45 AM

AGCO Corporation is the first horse out of the gate. The company's lineup of AGCO DT Series, Challenger MT600C Series and Massey Ferguson 8600 Series tractors are the first ag workhorses to be outfitted with engines using selective catalytic reduction (SCR) technology.

Introduced in early February, the tractors are powered by AGCO Sisu Power engines that use SCR technology (over-the-road trucks use similar systems), which makes the tractors Tier 3 compliant and poises the machines to be Interim Tier 4 compliant in 2011. AGCO has dubbed the engine technology e3–energy, economy and ecology.

"SCR provides emissions compliance while letting the engines be engines," explains Jason Hoult, AGCO product marketing manager. "SCR gets up to 15% better fuel economy over exhaust gas recirculation (EGR) technology. Even with the additional expense of diesel exhaust fluid (DEF), which costs about the same as diesel fuel, you're still getting 12% savings total."

The SCR technology mixes the nitrogen oxide (NOx) emissions with DEF, so nitrogen and water are the final engine emissions into the air.

"We went with SCR because it's the complete aftertreatment. It's after the engine's combustion process, so the engine can be tuned for economy and power, and we take care of the NOx on the back end," Hoult says.
Sisu Power's SCR requires the use of 32% aqueous urea solution as the DEF. The DEF tank is 8 gal. and needs to refilled at every other fueling of the tractor's 156-gal. diesel tank. DEF should be readily available, as the on-highway diesel market is about to embrace SCR as its means to meet Tier 4 compliance by 2010. AGCO dealers also plan to supply DEF in 2.5-gal. jugs.

The tractor will have a DEF gauge on the dash panel, just like a fuel gauge. If you ignore the warning when DEF is low, the tractor will go to 50% power when it runs out.

"We believe in this technology, and e3 engines are standard equipment on these tractors," Hoult says. "The EGR engines will still be available but for an extra expense."

These 8.4-liter engines provide a maximum torque rise of 54% and a 15% power bulge. Each tractor brand offers four models ranging from 205 PTO hp to 275 PTO hp.

The engines aren't the only advanced features you'll find on the three tractor families. The company continues its movement toward ISOBUS compatibility, and the series have the plug-and-play functions that allow them to
immediately communicate with ISOBUS implements.

All models are outfitted with the OptiRide hydraulic cab suspension system. An optional OptiRide Plus reactive cab suspension provides a 50% reduction in movement compared to a cab without suspension. Other improved features include a cast sculptured front end, redesigned front weights, a larger axle for duals, an improved turning angle of 55° and a hydraulic pump with dedicated flow for operating implements.

Written by Margy Fischer. You can e-mail Margy at

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