First Class

Spring 2016

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Rows of PACCAR MX Engines at the PACCAR Engine Company are ready to be installed in Peterbilt Models 579 and 567. MX-11s in DAF trucks, powering almost 20 percent of DAF trucks produced in that period. "The markets are different," says Sproull. "Trucks in much of the EU are governed at 85 kmh (about 54 mph) and there's flatter terrain there than you'll find in most of North America. "But the trend to the smaller engine there was so strong, and their market has embraced it to such a degree that we believe the MX-11 will be very popular here. We've already experienced a similar downsizing trend here, from 15-liter to 13-liter engines. Think back to 10 years ago and the 13-liter engine was hardly on anyone's radar." A constant dialog with North American cus- tomers further convinced PACCAR officials that the MX-11 had a place in North America, and pilot engines were placed with select customers in 2014. "It's 400 lbs. lighter than a 13-liter engine," says Peterbilt Chief Engineer Scott Newhouse. "We expect to appeal to on-highway vocational segments. Concrete mixers, fuel delivery, bulk haulers — customers who benefit from carrying more payload are always looking for weight savings. Dump trucks, the refuse segment, the LTL segment, regional haulers — we believe the 11-liter engine will be an excellent match to the application in each of these segments." The MX-11 has an output of up to 430 hp and 1,550 lb.-ft. of torque. It has six inline cylinders and, like the MX-13, its block is made of Compacted Graphite, which is 20 percent lighter and 75 percent stronger than traditional gray iron. Designed to achieve an industry-leading B10 life of 1,000,000 miles, the MX-11 also utilizes a common rail fuel system with injection pressures of 2,500 bar to optimize combustion for low fuel consump- tion and noise levels. The MX-11 also employs a double overhead camshaft design that is uniquely suited to the smaller block. "The smaller engine architecture has a nat- ural fuel-efficiency advantage from lower para- sitic losses and the ability to haul more payload due to the lower weight of the engine," notes Sproull. "The dual overhead cam design adds to the engine's ability to deliver excellent fuel econ- omy and engine braking performance." With full production under way at the PACCAR Engine Company plant in Columbus, Miss., Sproull says the excitement surrounding the MX-11 has reached high levels. "I'm anticipating that we're going to be very pleasantly surprised by the demand for our 11-liter product based on the feedback we've been getting," he says. "Many of our customers are really looking forward to owning this engine. Additionally, our dealers and our internal staff are extremely confident in the new product. "What's happened with the MX-13 has been truly phenomenal, and we have high expectations for this engine as well. We're very enthusiastic about the MX-11 Engine in North America." fC "Many of our customers are really looking forward to owning this engine." Landon Sproull PaCCar assistant Vice President 8 l FIRST CLASS

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