Built Like A Mack - Maxidyne 300 Series |
The high-speed, high-torque Maxidyne engine Mack Runs Away from Home In 1890, John was employed at the Fallesen and Berry Carriage and Wagon Co. Due to his quick success, he convinced his brother Augustus to come on board and purchase the firm located in Brooklyn, New York. A year later, their brother William joined the firm after operating a wagon-building company in Scranton, Pennsylvania. The family's purchase paralleled one of many financial panics that occurred during this period. Undaunted, the brothers quickly adjusted and went into steam-engine maintenance and repair. Mack Builds a Bus Never ones to be shy, the brothers used this platform in a successful ad campaign, "The first Mack was a bus, and the first bus was a Mack." This successful bus platform was converted into a truck in 1908 and racked up more than a million miles in its long career. Dubbed Old No. 1, this platform marked the beginning of American truck development and forever established Mack as a brand noted for tough, reliable, high-quality trucks. In 1905, the company moved its headquarters to Allentown, Pennsylvania. The Mack Brothers Motor Car Co. was incorporated, and brother Joseph became a stockholder. Mack Innovations Mack also produced a variety of rail cars and locomotives in 1906. The brothers expanded their operations in Brooklyn by setting up the Mack Brothers Manufacturing Co. to continue wagon production and the repair of motorized vehicles. The Mack Junior brand appeared in 1909. This lightweight, 1 1/2-ton truck platform featured lefthand steering. Of interest is the fact that the heavier Mack Senior-series retained its steering wheel on the righthand side; both platforms utilized chaindrive. The company produced 600 units a year and had 825 employees in 1911. This was also the year in which the young company could claim it was the leading gasoline truck producer in America. Financial clouds appeared on the horizon by 1913, with decreased truck sales felt by all in the industry. Mack merged with Saurer Motors and quickly thereafter the Hewitt brand. The mergers brought along accompanying board members with conflicting views. Unfortunately, the Mack brothers left their company, never to return. Mack's new chief engineer, Edward R. Hewitt, however, was responsible for a new medium truck series that many feel was the brand's mainstay from 1914-1936. The Mack AB-series was powered by the company's proven four-cylinder mill backed up with a three-speed transmission and a worm-driven axle. Hewitt's replacement, A.F. Masury, created the equally famous Mack AC, the heavy-duty, chaindriven platform that featured clutch brakes. This platform was solely responsible for the phrase "Built like a Mack truck" because of its ability to haul the heavy artillery pieces to the trenches in World War I. The '20s were a period of growth and further innovation. Mack was producing 7,000 trucks a year by 1927. The company also added four-speed transmissions, dual-reduction drive, rubber shock insulators, and improved cooling systems. Inline-Six Engine Debuts In the years of the Great Depression that followed, 250 automotive brands disappeared, and truck demand also suffered. At Mack, sales fell by 75 percent from 1929-1932. To answer falling sales and the entrance of new competition, Mack introduced its revolutionary CH- and CJ-series of cabover platforms. Mack survived by cutting costs and benefited from increased acceptance of truck transport and higher demand for bus platforms. Mack Builds Its First Diesel As World War II loomed on the horizon, Mack began producing the NR-series truck, a military spec'd six-wheel tank transporter initially sold to Britain. With the opening of hostilities, the MO-series truck was produced to pull a 150mm artillery platform. Military equipment was produced by government mandate until 1946. Seven years later came the introduction of the Thermodyne END-673 diesel engine. An upgraded diesel unit, the new mill featured direct injection, which produced greater power output, combined with Mack's reliability. Eighty percent of the company's famous B-series trucks were equipped with these powerplants. The Maxidyne engine used two-piece pistons that were held together by the piston pin for reduced heat transfer and piston scuffing. The Mack Advantage Mack capitalized on its engine's brute-force advantage by producing a five-speed triple countershaft Maxitorque transmission. The idea was intended to make the driver's job easier (less shifting), compared with the competition's 10-13-speed transmissions. This meant a Mack truck traveling at 50 mph in Fifth gear with a heavy load could climb a 6 percent grade with the driver downshifting only one gear. In Fourth gear, the Maxidyne (Maxis) engine could maintain 1,700 rpm, and the truck would crest the grade at 20-25 mph. Maxis were highly regarded in over-the-road, dump-truck, and mixer applications, where low speeds were common and constant shifting was a pain. In 1973, an intercooled ENDT 676 Maxidyne-series engine was introduced. This new unit featured 1,080 lb-ft of torque with 285 hp. With current emissions laws, some of the old broad powerband coverage has been lost due to the EPA's exhaust-gas recirculation. The five-speed "tyranny" is history, too, but Mack's new TM-309-M six-speed is available with three extra-low gears. It also features a pushbutton for Reverse, where all six speeds can be utilized as well. The latest Maxidyne series includes the 300-, 335-, and 370hp variants-all are EPA controlled. In 2000, Mack truck became a wholly owned subsidiary of AB Volvo. Mack trucks are currently sold in 45 countries worldwide. |