In an effort to give Mack Trucks’ vocational customers improved durability and broader options for their applications, Mack is now offering a 23,000-pound rear axle and Cummins B6.7 engine with up to 325 horsepower on its Mack MD Series models.
Designed for a Gross Axle Weight Rating (GAWR) of up to 23,000 pounds, the heavier axle and suspension offer increased capability for hauling loads requiring the most durable of trucks, Mack said. The Mack MD with the 23,000-pound rear axle specifically benefits refuse packers with 11-yard up to 20-yard rear loaders, as well as those MD models being utilized as water trucks holding 2,000 to 2,500 gallons of water.
When paired with the 325-hp engine rating and the Allison 3000RDS transmission, the Mack MD is now capable of increased towing capacity if the customer has a trailer.Mack Trucks
“The 23,000-pound rear axle expands the applications in the vocational market -- with refuse and construction reaping the most benefits,” said Tim Wrinkle, Mack vice president of vocational and medium duty. “The 325 horsepower also offers carriers traversing longer routes or in a hilly or mountainous region a more durable and reliable powertrain. The rear axles on those truck models equipped with a dump body, hook lift or roll-offs take some abuse during the truck’s lifespan. The heavier axle rating has better durability, and the larger horsepower engine will provide enhanced performance.”
[Related: Test drive: Mack MD Series]
The Mack MD6, a Class 6 model, has a Gross Vehicle Weight Rating (GVWR) of 25,995 pounds, and the MD7, a Class 7 model, has a GVWR of 33,000 pounds. Both models are exempt from the 12% Federal Excise Tax, Mack noted.
The Mack MD Series is a model range built specifically for medium-duty applications. Available in 4x2 configurations, the MD6 and MD7 models feature a sharp wheel cut for enhanced maneuverability for tough urban settings. The MD Series cab was recently updated to a larger cab with bumper-to-back-of-cab (BBC) measurement of 107 inches.
The interior boasts premium satin aluminum trim, improved seating with lumbar support and enhanced LED lighting. New steering wheel controls for cruise control, telephone and audio functions have been added, increasing driver convenience and safety.
The trucks now come standard with several enhanced safety features, including new ABS (anti-lock braking system) with ATC (automatic traction control), radio mute in reverse and a parking brake alarm.
[Related: Mack refreshes MD Series with larger cab, more interior features]
What's your favorite Mack model throughout the company's 125-year history? Mack's celebrating that anniversary this year with an expected new tractor model to be announced in April -- take the survey at this link to weigh in with your pick of models and share some of your own history with Mack trucks.
