HOS conflicts

| December 15, 2005

Mack spokesman John Walsh said, “We have not yet announced our 2010 solution, but SCR is certainly one of the technologies we’re strongly considering.”
-Paul Richards and John Baxter


Mack Introduces New Tractor and Engine
Mack Trucks unveiled a new flagship highway tractor called Pinnacle and new models of its Granite and Granite Axle Back construction vehicles. The announcement was made at the company’s national sales meeting in Las Vegas in October.

The truck maker also unveiled the MP7 engine, the first in a new Mack Power family of engines based on the same architecture as the one that will be used to meet the 2007 U.S. emissions regulations. Mack said customers in both highway and vocational applications can expect a significant improvement in fuel economy in the MP7 compared to current engines.

“This is truly the start of a new era for Mack,” said Paul Vikner, Mack president and CEO. “The new products that we’re debuting today directly respond to our customers’ requirements and represent the combining of our heritage of reliability and durability with the latest in breakthrough technology.”

Available in the initial offerings of both the Pinnacle and the new Granite, the MP7 is an 11-liter engine available in the three Mack engine families – Econodyne, Maxidyne and MaxiCruise – in six horsepower ratings between 325 hp and 405 hp, with torque ranging from 1260 pounds-feet to 1560 pounds-feet.

The MP7 engine’s key components include:

  • High-performance (cooled) exhaust gas recirculation system (HEGR)

  • Variable geometry turbocharger (VGT) with sliding nozzle ring
  • Electronically controlled unit injectors
  • Single overhead cam with four valves per cylinder
  • Wet sleeve cylinders with single-piece steel pistons
  • Rear gear train that offers a simple REPTO option.

The second member of the new engine family, the MP8, will be available in 2007. The MP8 is a 13-liter engine with horsepower ratings from 415 to 485 matched to torque levels from 1540 pounds-feet to 1700 pounds-feet.

The Pinnacle highway tractor is offered in a 116-inch bumper-to-back-of-cab daycab configuration, as well as 48- and 56-inch flat-top, 60- and 70-inch mid-rise, and 70-inch high-rise sleepers built on Mack’s Advantage highway chassis. The new Granite and Granite Axle Back models feature a 116-BBC dimension and are built on the Mack Cornerstone vocational chassis. Both product lines were built behind the MP engine, the company says.

New cab designs include:

  • A 4-inch increase in daycab depth

  • A wrap-around “cockpit style” dash, with a new primary gauge cluster and space for up to 25 switches
  • A one-piece windshield for enhanced visibility
  • A broadly adjustable steering column and new driver foot pedal controls that allow the driver to keep his heel in contact with the floor when switching between fuel and brake pedals.

In addition to bringing the new models and engines to market, Mack also plans to continue offering its 2004-certified ASET engines in current Vision highway and Granite vocational models in 2006.

“This approach gives customers interested in experiencing our new engine technology as soon as possible the opportunity to do so, and those who prefer to continue with our current offering for another year a similar opportunity,” said Tom Kelly, Mack’s vice president of marketing. “It also allows us to gradually ramp up our product offering and production capabilities to ensure preparedness for 2007.”
-Avery Vise and John Baxter


California Includes Sleepers in Idling Rule
The California Air Resources Board ruled Oct. 24 that heavy-duty trucks with sleeper cabs are now included in the current provision that prohibits diesel engines from idling for more than five minutes.

Comments are closed.

OverdriveOnline.com strives to maintain an open forum for reader opinions. Click here to read our comment policy.