Cummins launches next-generation Tier 3 QSB engines

Cummins’ QSB engines not only meet Tier 3 emissions requirements, but are fully capable of moving forward to future Tier 4 requirements, the company says. The engines feature advanced electronics, new sculpted blocks, rear gear trains and high-pressure, common-rail fuel systems. Available in both a four- or six-cylinder platform, the engines are rated from 110 to 275 horsepower. The 6.7-liter QSB, rated at 135 to 275 horsepower, will be in limited production in June, and the 4.5-liter version, rated at 100 to 170 horsepower, will start production in December. Both engines feature more than a 55 percent reduction in sound pressure. In addition, the company has established an uptime Guarantee program for its Tier 3 engines. Under the guarantee, if a customer’s Cummins Tier 3 engine can’t be repaired within 48 hours of diagnosis, Cummins will give the customer a $500 parts and service credit. Also new from Cummins: The firm’s Centinel Advanced Engine Oil Management System is now available as an aftermarket kit for QSK, QSK19, QSK45 and QSK60 engines rated between 350 and 3,000 horsepower.