Heavy Duty Trucking

SEP 2014

The Fleet Business Authority

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www.truckiningfo.com SEPTEMBER 2014 • HDT 31 There's no beating the ease of doing business with your trusted local truck parts distributor. As part of North America's Leading Truck Parts Network ® , your local VIPAR Heavy Duty Parts Professional offers the brands you want and the expertise you need, with the strength and resources of a network of over 500 locations throughout the U.S., Canada, Mexico, and Puerto Rico. The Right People. The Right Parts. The Right Places. Find out more at www.vipar.com © 2014 VIPAR Heavy Duty The Expertise of Your Local Truck Parts Professional Backed by the Power of a North American Network www.VIPAR.com Circle 161 on Reader Action Card New rules on replenishment of diesel exhaust fluid will allow manu- facturers more leeway in equipping vehicles with DEF tanks without certifying them individually, accord- ing to the Environmental Protection Agency. One practical result is that some trucks might get smaller DEF tanks. DEF is the special fluid needed for selective catalytic reduction aftertreatment to meet emissions regulations. It is widely available today so not as much of it must be carried aboard the vehicle. The new rules reflect EPA's greater confidence in availability of DEF, said a source within the agency who couldn't be directly quoted. In 2001, when rules were first pub- lished, SCR was a new concept in North America and EPA wasn't sure DEF would be readily available. The new rules set tank-size "ra- tios" of DEF to fuel. This will give manufacturers "more flexibility" in choosing tank sizes, the EPA source said. Vocational trucks that return home daily for fueling can have DEF tanks that need filling when- ever the fuel tanks do, which the rules call a 1 to 1 ratio. This might allow trucks to carry a smaller DEF tank, which could save some weight and frame space. For long-haul trucks the ratio is 2 to 1, meaning their DEF tanks could be filled every other time the fuel tanks are. This might also allow a smaller DEF tank, though truck owners might prefer larger tanks so the fluid refilling task could be done less often. Truck owners and drivers are not affected, except that they must continue properly maintaining their vehicles so the anti-pollution equip- ment, including SCR gear, works properly, EPA says. The rules might have more effect on diesel-powered light-duty vehicles, especially cars, because EPA wants replenishing schedules to be shorter than they are becoming, says Allen Schaeffer, executive director at the Diesel Technology Forum. Manufac- turers have sized DEF tanks so top-offs could be done at engine oil-change times, but those intervals are becoming longer, and EPA worries that fluid fills could be delayed. – Tom Berg, Senior Editor DEF tanks could get smaller under new EPA rules

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