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Terex Dispatches First Front Discharge Mixer With Epa 2010-Compliant Power

After a road test beginning in Indiana, with stops at Connecticut and New York ready mixed plants, a Terex FDB6000 running a production Cummins ISX11.9 engine debuted at the 2010 ConcreteWorks Conference & Expo, October 10-12 in Concord, N.C.

Sources: Terex Roadbuilding, Ft. Wayne, Ind.; CP staff

After a road test beginning in Indiana, with stops at Connecticut and New York ready mixed plants, a Terex FDB6000 running a production Cummins ISX11.9 engine debuted at the 2010 ConcreteWorks Conference & Expo, October 10-12 in Concord, N.C. The six-axle truck is the industry's first front-discharge model with engine and exhaust treatment meeting Environmental Protection Agency emissions thresholds for 2010 on-highway or on/off-highway diesel powerÛ0.2 gm/brake hp-hour and 0.01 gm/brake hp-hour for oxides of nitrogen (NOx) and particulate matter, respectively.

A successor to the Cummins ISM, the ISX11.9 meets standards through a diesel particulate filter (DPF), which anchored EPA 2007-compliant power, plus Selective Catalytic Reduction (SCR). That technology is centered on a chamber in which post-DPF exhaust is treated with a small quantity of urea, or diesel exhaust fluid (DEF), netting tailpipe nitrogen and water vapor. Terex engineers have secured the DPF and SCR chamber to the frame FDB6000 (versus engine mounting) and shielded each with perforated chrome. A 5-gal. DEF tank is nestled between the frame rails, just ahead of the rear cross member.

Inside the cab, the instrument panel includes a separate fuel-type gauge for the DEF tank and a multi-stage visual and audio DEF level warning system. Truck shutdown triggers a 60-second DEF system reversing cycle to purge lines--a factor critical to operations in colder climates, where fluid can freeze. A new combo engine/transmission arrangement eliminates a previous rear transmission mount, reducing the number of parts to maintain. Both the engine and transmission can be removed independently of each other, simplifying servicing.

The SCR treatment affords EPA 2010 engines more power or fuel economy than prior-year models. In order to operate the DPF to meet NOx levels, the 2007 EPA engines were not running at an ideal setting, which affected performance, notes Terex Concrete Producer Group Equipment Specialist Jim Aslin. The current engines are set to run more efficiently, he adds, as a new electronic control module automatically senses whether or not the truck is loaded.

The 425-hp ISX11.9-equipped FDB6000 will continue on a demonstration schedule toward the 2011 World of Concrete in January and ConExpo-Con/Agg in March, both in Las Vegas. As the model heads to the Las Vegas Convention Center, Terex continues engineering the FD series for the DD13, an alternative EPA 2010-compliant engine Detroit Diesel has released in mixer- or dump-suited ratings. More immediately, the company is preparing its first rear discharge model running 2010 EPA-compliant powerÛa Kenworth W900 with the ISX11.9Ûfor release by month's end.