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.
Cummins launches next-generation Tier 3 QSB engines
May 4, 2005