Navistar has released its International PayStar severe service truck powered by the all-new MaxxForce 15 big bore diesel engine. The complete line-up of MaxxForce big bore engines—the MaxxForce 11, MaxxForce 13 and MaxxForce 15—is now available for order in the PayStar.
“With the introduction of our MaxxForce 15, our line-up of fully-integrated trucks and engines is complete,” said Jim Hebe, Navistar senior vice president, North American sales operations. “The introduction of PayStar and MaxxForce 15 now gives us a proprietary truck and engine combination with the durability and power that heavy-duty construction customers demand.”
On display at the show is the International PayStar 5900 Set-Back Axle (SBA) tractor, which along with the PayStar 5900 Set-Forward Axle (SFA) is available for order with the MaxxForce 15. Also on display is the International PayStar 5600, which along with the PayStar 5500 is available with the MaxxForce 11.
Engineered specifically for International brand severe service trucks, MaxxForce 15 is available with up to 550 horsepower and 1,850 lb.-ft. of torque and is the most powerful engine Navistar builds. The engine is designed to handle the most severe demands that International PayStar customers require.
The MaxxForce 15 is built on a proven block and crankshaft combined with the fuel systems, air management and electronic controls of the MaxxForce Advanced EGR system. Peak torque is achieved at 1,000 rpm and holds steady to 1,600 rpm, which reduces gear-shifting needs uphill and allows for shifting at lower speeds when accelerating. Durability is enhanced with a four-bolt connecting rod design. The four-bolt design assures the clamping force and rigidity required for extreme loads and terrain, for which the MaxxForce 15 is uniquely designed.
A premium cam and rolling element valve train system reduces friction and operational load to maintain peak efficiency across the power band. Interstage cooling between the turbos increases air density to maintain peak power as speeds increase.
“Over the last several years, we’ve remained committed to the construction industry and have made significant investments to bring the best vocational truck products to market,” Hebe added. “From our no-hassle MaxxForce Advanced EGR emissions technology to new products like the International TerraStar® and TerraStar 4x4 to the integration of Continental Mixers, we continue to focus on meeting the needs of vocational customers by delivering innovative, best-in-class products for a wide range of severe service applications.”