Heavy-Duty Mack

THE NEW Granite series of heavy-duty vocational trucks is expected to play an important role in the effort at Mack Trucks Inc to boost US marketshare to 15% this year. Based on the RD frame, the Granite is well-suited to a variety of applications, including heating oil delivery, dump, refuse, and cement mixer. A vocational tractor version also is available.

The Granite Bridge Formula truck was introduced in March as a lightweight, yet highly durable option for those areas of North America where vehicles must conform to strict bridge formula weight regulations. It will continue to be an important weight-focused product.

Mack has been building the Granite at a rate of four to six a day since November 2000. Now that a full range of specifications are being offered, production is being ramped up to 10 to 15 a day. The Granite is being built at the Mack assembly facility in Macungie, Pennsylvania. Mack officials stressed during a press conference June 22 in Las Vegas, Nevada, that the Granite is an addition to the vocational lineup and will not replace any existing Mack models.

“We will continue to build RDs and DMs as long as we have significant customer demand,” says Kevin M Flaherty, Mack senior vice-president of sales. “At the same time, the Granite helps enhance our leadership role in the heavy-duty vocational truck market.

“With the Granite, Mack has a truck that thoroughly addresses the demands of today's customers for sharp styling, operator-friendly features, and up-to-date electronics and technology. It also has the strength and dependability of other Mack products.”

With a variety of configurations available, the Granite product line covers the complete spectrum of vocational market needs, including everything from a cost-effective basic specification truck for fleets, to the growing need for strong and weight-efficient construction trucks, to a high-end premium vehicle for owner-operators.

The Mack E-Tech engine is standard on the Granite truck, and horsepower ratings range from 300 to 460. The Mack E-Tech engine is a six-cylinder, inline electronically controlled diesel engine. The Cummins ISL Series engine, rated at 310 to 330 hp, is available as an option. The lightweight nine-liter ISL has electronic controls and a high-pressure fuel system.

Also standard is the new line of Mack Maxitorque ES transmissions, which offer a host of speeds (5,6,7,8,9,10,13 and 18-speed versions), gear ratios, and PTO options to satisfy all vocational assignments.

The V-MAC electronic vehicle management and control system is another important feature. V-MAC electronics allow operators to precisely control PTO speed and body status, while simultaneously providing important information such as trip summaries and histograms, driver logs, and maintenance records.

With V-MAC, truck operators can tap into the intelligence capabilities of the optional Mack Vehicle Information Profiler (VIP), which is easily reviewed on the new dash panel.

Moving beyond the drivetrain, Granite is a tough vocational truck. Extensive testing has verified that the cab is the strongest ever made by Mack, according to Flaherty. A new back-of-cab crossmember is Huckbolted to the chassis to meet the strength requirements of construction applications.

Providing the muscle to the Granite series are full-height frame rails from front to rear. They are available in a 3/8-inch thickness or a 5/16-inch thickness with quarter-inch inside channel reinforcement.

A variety of Mack wheelbases, axle configurations, transmissions, and carriers are available on the Granite truck, including rear tandem options with up to 65,000-lb capacity. Optional components may be specified from leading suppliers in North America. Granite series vehicles can be ordered with increased compressed air capacity to accommodate auxiliary lift axle installations, even multi-axle arrangements.

Customers can choose from three interior trim packages — Contractor, Select, or Premier. Common features across all versions include a cab that offers a generous amount of leg, head, and belly room. The truck also has a construction-specific air-ride cab mounting system, new padded steering wheel, and ergonomically positioned pedals and controls.

A new dash panel, which houses up to 14 gauges and up to 21 standard and customized switches, further contributes to the driver-friendly features of the Granite. Gauges are flush with the dash for excellent visibility. Optional dash upgrades include a wood grain finish for the Premier model and bright finish gauge bezels for the Select and Premier models.

Door windows are larger for better operator visibility, and a right side peep window is available as an option. The large windshield and contoured hood on the Granite provide excellent forward visibility.

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