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The International S series is a range of trucks that was manufactured by International Harvester (later Navistar International) from 1977 to 2001. Introduced to consolidate the medium-duty IHC Loadstar and heavy-duty IHC Fleetstar into a single product range, the S series was slotted below the Transtar and Paystar Class 8 conventionals.
In 1915 a new L-head water-cooled 201 cubic inches (3.3 L) inline-four engine appeared. [3] While International's own engines underwent constant developments, the pace of truck production in the twenties was such that others' engines (from Waukesha, Buda, and Lycoming for instance) had to be installed in some parts of the range. [4]
In 2004, the International 3800 ended production, replaced by the International 3300 (a cowled-chassis version of the International 4300/DuraStar). In production for over 25 years, the S-series bus chassis was the longest-lived model line ever produced by International and the final Navistar product line developed by International Harvester.
Cyrus Hall McCormick patented an early mechanical reaper. 1900 ad for McCormick farm machines—"Your boy can operate them" 1921 International Harvester Model 101 on display at the Iowa 80 Trucking Museum, Walcott, Iowa. 1925 International Model 63 Street-Washing Truck on display at the Iowa 80 Trucking Museum, Walcott, Iowa.
In 2019 International markets six separate series of medium-duty, heavy-duty, and severe-service trucks with loaded weights from 16,000 to 92,000 pounds (7,300 to 41,700 kg) and up to 140,000 pounds (64,000 kg) including trailers. International also has always built a wide range of custom and speciality use trucks and chassis.
The Navistar DT (Diesel Turbocharged or Diesel Turbo) engine family is a line of mid-range inline-6 diesel engines.With horsepower ratings ranging from 170 hp (130 kW) to 350 hp (260 kW), the Navistar DT engines are used primarily in medium-duty truck and bus applications such as school buses, although some versions have been developed for heavy-duty regional-haul and severe-service applications.
For the 1983 model year, Ford entered into a supply agreement with International Harvester to use the newly introduced IDI diesel V8 for 3 ⁄ 4 and 1-ton F-Series pickups and E-Series vans. While roughly matching the output of the discontinued 400 cubic-inch V8 (the engine that it replaced alongside a reintroduced 460), the 6.9L diesel offered ...
The size of the radiator (and thus its cooling capacity) is chosen such that it can keep the engine at the design temperature under the most extreme conditions a vehicle is likely to encounter (such as climbing a mountain whilst fully loaded on a hot day). Airflow speed through a radiator is a major influence on the heat it dissipates.