Kenworth recently added two new ratings for the 12.9-liter PACCAR MX-13 engine available for the Kenworth T680, T880 and W990.
The PACCAR MX-13 engine is designed to bring efficiency and flexibility together into one, high-performance solution, the company said.
The first new rating of 405 horsepower and 1,650 pound-feet of torque provides constant power for line-haul applications, enhances integration with the PACCAR Powertrain, and offers increased fuel efficiency.
The second is a multi-torque 455 hp rating with 1,650/1,850 lb-ft of torque that is optimized for fuel-conscious heavy haul fleets and truck operators. This rating provides additional torque in the top two gears while pulling a load up a hill, eliminating the need to downshift.
As a result, the PACCAR MX-13 engine now offers ranges of 405 to 510 hp and 1,450 to 1,850 lb-ft of torque.
“These new PACCAR MX-13 ratings provide enhanced fuel efficiency and lower operating costs for our customers,” said Kurt Swihart, Kenworth marketing director.
In addition, Kenworth now offers a variable speed fan clutch as on option for the 10.8-liter PACCAR MX-11 engine for the Kenworth T680 and T880.
The clutch maximizes engine power to the drive axle, helps prevent under- and over-cooling in all climates, and provides faster warm-up and more efficient air conditioning. The PACCAR MX-11 engine features superior performance, a powerful and lightweight design, and ranges of 355 to 430 hp and 1,250 to 1,650 lb-ft of torque.
“The PACCAR MX engine series has a B10 design life of 1 million miles in line haul applications. This means 90% of PACCAR Engines will log up to 1 million miles without a major overhaul, almost double the life of a comparable engine,” Swihart said.
“The PACCAR MX engine series has been well-accepted by fleets and truck operators in the United States and Canada since introduction nine years ago.”