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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.
International Harvester's first in house six-cylinder engines appeared in some of the 1926 S-series trucks, seemingly a response to market pressures rather than to any particular need for such a layout. [5] In 1928, a new heavy range of trucks (the HS-series) built around a series of engines from Hall-Scott appeared.
The S series was a range of medium and heavy-duty conventional trucks that was introduced in 1977 to replace and widen the LoadStar and FleetStar lines. It used a new cab with flat panels and forward tilting hood in different lengths. The series was very wide, from the medium duty 1600 to the regional semi-tractor 2500 and severe-service 2600.
The bus chassis variant of the International S series is a cowled bus chassis (conventional style) that was produced by International Harvester (later Navistar International) from 1979 to 2004. Produced primarily for school bus applications, the chassis was also produced for other applications, including commercial-use buses and cutaway-cab buses.
International S-Series The International Fleetstar is a series of heavy-duty trucks that was produced between 1962 and 1977 by International Harvester . Slotted above the Loadstar and below the Paystar and Transtar conventionals introduced after it, the Fleetstar was the first truck line that International designed specifically for vocational use.
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.
As IH's own engines were temporarily in short supply due to the success of the Loadstar medium-duty truck, some 1973 and 1974 pickup trucks received AMC's 401 ci V8 engine instead (called the V-400 on International's option list). The crew cab Travelette was only available on the 1210 series.
In 1955, the primary International truck line became the S series, with the Travelall now offered on the S-110 or the heavier-duty S-120 ranges, with the SD 220 engine replaced by the BD 220 engine. For 1956, four-wheel drive became offered as a factory-installed option. [1]