MaxxForce5: V-6, 4.5L,two...
MaxxForce5: V-6, 4.5L,two turbochargers,200 hp, 440 lb-ft
Navistar International Truck and Engine Corp. announced its new lineup of MaxxForce International Diesel Power (we sure like that name) engines for the emissions-rules-laden '08 model year. As of January 1, 2007, the new series will become the new signature-branded powerplant for the company for the on-highway Class 4 through Class 8 commercial platforms. Here in North America, MaxxForce will range from an upgraded 4.5L V-6, dubbed the MaxxForce 5, to a new Big Bore Class 8 mill, the MaxxForce 13. The MaxxForce 7 looks familiar because it's a single-turbo variation of the 6.4L Power Stroke that will be in the new Super Duty pickups.
How It All Started
The history of International Harvester dates back to 1902, but the company's beginnings can actually be traced all the way back to 1831. In that year, Cyrus Hall McCormack invented the first mechanical reaper for the wheat harvest. Sixty-five years later, there were two main producers of harvesters in North America: McCormack and Deering-and both were located in Chicago. By 1902 they controlled the market and merged with three other manufacturers to form the new International Harvester Company. With the brand-new company formed, Cyrus H. McCormack, the son of the original inventor, was put in charge.
The Birth of the International Farm Truck
Grain-box buggies were produced and a motorized version was introduced in 1907, under the original title of "Auto Wagon." This ungainly platform mounted on higher wheels was aimed directly at the farmer, their prime customer. As time went on, conventional truck platforms were adapted to the line. A remarkable 2-ton version was built along with the first International nameplate in 1914. In 1915, a dropped stub-nosed hood hid a new inline four-cylinder, which had its radiator mounted behind the engine up against the passenger cowling.
Red Babies
A new S-series line was introduced in 1921. Known in the farming community as "Red Babies," these platforms became a best seller because of their nimble size combined with a bright red paint job. Sold through International's established farm equipment dealers, the units were marketed as "speed-trucks" because 30-plus mph could be reached. A new assembly plant was opened during this period along with the company's first enclosed-cab series in 1927. Sales figures of 50,000 units in 1929 made IH a major player. The company's 170 sales branches covered the landscape. The diesel revolution and their powerplants were introduced to the line in 1933.
 MaxxForce7: 200-230 hp, 560-620...  MaxxForce7: 200-230 hp, 560-620 lb-ft | 
MaxxForce7: Left side |  MaxxForce9: 300-330 hp, 800-950...  MaxxForce9: 300-330 hp, 800-950 lb-ft |
10-Ton Debut
The company's C-series, a heavy truck in rigid and articulated form featuring styling cues with a sloping facia along with a V-shaped aluminum grille, was introduced in 18 models. An impressive 7-ton version handled the upper range. Ten-ton six-wheelers appeared in the mid-1930s. A D-series was introduced in 1937, and the styling was romanced. By the end of the 1930s, cabover models were the rage, and the company fell in line with the competition. An added addition was a true sleeper cab, which appeared in 1938.
War Times
As war clouds appeared in 1940, the company introduced its famous K-series. When production was changed over for wartime, International was one of America's largest manufacturers. The noted H-542 semi-forward-control platform was shared with Kenworth and Marmon-Harrington. In 1946, the K-series was renamed the KB. Its successful and recognized design was the basis of both the Russian ZIS and China's Jiefang truck lines. A new conventional R-series appeared in the early 1950s. It featured a new all-steel cab, with a curved one-piece windshield and a contemporary grille design that featured three horizontal bars in the lower facia; a sleeper cab option was available. This new Comfo-vision cab was also modified in a lower version with a different grille design that was marketed as the S-series.
International Stars
Fleetstar was the replacement of the R-series in the mid-1960s, and, in keeping of the times, the hood design was lower and wider. During this same period, the "Star" series suffix appeared. Loadstar was assigned to the company's medium- and heavy-duty offerings. The Fleetstar label was applied to the heavy-duty conventionals. Paystars handled the construction market, with the Transtar series handling the line-haul end. A new Cargostar series was assigned to the medium-duty cabovers. As a side note, Diamond-T trucks originally designed these COF cabovers years earlier.
Navistar International
Though International was considered one of the world's largest producers of trucks by the 1970s, severe problems began to develop. The company looked to Europe for its future growth and entered into several agreements with DAF, Seddon Atkinson, and Spain's ENASA. The problem was that the market fell flat, and the sales evaporated. Adding to the bleeding was the fact that the 1970s energy crisis and rapid economic downturn were also killing home market sales. In addition, the company's light-truck and Scout businesses were tanking along with its traditional Ag market. By the early 1980s, with bankruptcy approaching, drastic measures found the company selling off many of its historical divisions and then drastically restructuring. The company's SUV and light-truck divisions disappeared along with its van deliveries. Its Scout, Travelall, Metro, and pickup brands were suddenly history.
Depending, once again, on its truck heritage, the company maintained its medium- and heavy-duty conventional series, hung on to its line-haul business, and looked to its powerplant engineering and production for growth. Navistar was added to the logo as the company reinvented itself.
Today, the tough decisions have paid off as the company continues to dominate the medium-duty truck market. The sale of its diesel engines, combined with its success in the line-haul and heavy-duty construction market segments, the company has continued to produce profits.
 MaxxForce10: 310-350 hp, 1,050-1,150...  MaxxForce10: 310-350 hp, 1,050-1,150 lb-ft |  MaxxForce11 and 13: Built...  MaxxForce11 and 13: Built on MAN diesel engine foundation | |
Each MaxxForc eengine Has:
* Direct-injection, high-pressure, common-rail electronic fuel system using multiple injections.* Four valves per cylinder and roller rocker arms.* Geardriven air compressor and power-steering pump.* Rear gear train and pad-mounted accessories designed for low noise.*Closed crankcase, EGR system, and ultra-low sulphur diesel fuel compatibility.* Compacted graphite iron cylinder block for high strength and low weight (MaxxForce 11 and 13 only).
International is heading into the future with its new high-tech line of MaxxForce and Big Bore engines, but the company has roots that stretch back more than 150 years.