International Harvester S-Series
| International Harvester S-Series | |
|---|---|
1989 International S-1700 single-axle dump truck
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| Overview | |
| Manufacturer |
International Harvester (1978-1986) Navistar International (1986-2001) |
| Also called | Navistar International 4000-Series Navistar International 8000-Series |
| Production | 1977-2001 |
| Body and chassis | |
| Class | Class 6-7 medium-duty truck |
| Body style |
|
| Layout | 4x2 6x4 |
| Related |
International S-Series "Schoolmaster" International 3800 |
| Powertrain | |
| Engine | Gasoline 197–236 hp (147–176 kW) Diesel 150–500 hp (110–370 kW) |
| Transmission | Manual Automatic |
| Chronology | |
| Predecessor |
International Harvester Fleetstar (to 1978) International Harvester Loadstar (1962-1979) |
| Successor | International 4000-Series/DuraStar |
The International Harvester 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.
The IHC S-Series was produced in a number of variants for a wide variety of applications, including straight trucks, semitractors, vocational trucks, and severe-service trucks. Additionally, the S-Series was produced in other body configurations, including a four-door crew cab, cutaway cab, cowled chassis, and a stripped chassis (primarily for school buses). The chassis was produced with both gasoline and diesel powertrains (the latter exclusively after 1986), single or tandem rear axles, and two, four, or, six-wheel drive layouts.
The last complete product line designed within the existence of International Harvester, the S-Series was produced in its original form through 1989. To reflect the change to Navistar, a major facelift updated the exterior and interior of many models, which were produced through 2001. As a replacement for the S-Series, Navistar introduced the 4000-Series and 7000-Series (known as the International DuraStar and International WorkStar since 2008).
As a nameplate, International Harvester first introduced the S-Series for 1956. Available as the IHC light-duty and medium-duty range, the predecessor R-Series remained in production. In addition, the S-Series formed the basis for its own generation of the IHC Travelall wagon, marking the introduction of a four-wheel drive option for the model.
The heaviest version (the S1840) was produced with a GVWR of 24,000 lb (10,886 kg), powered by a 308 ci "Black Diamond" gasoline engine.
Production of the light duty S-Series ended in 1957, when it was replaced by the A-series. The S-184 heavy version was produced by the Brazilian subsidiary of International Harvester, until its 1966 purchase by Chrysler.
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