International S-Series

International S-1700/S-1800
1987-model Blue Bird-bodied International S-1800, marketed as the Blue Bird Conventional
Years of manufacture	1979 to 1989
Length	16'2" to 34'11"
Width	96 inches
Power/Fuel	Gasoline, Diesel
1988-model Thomas-bodied International S-1800, marketed as the Saf-T-Liner Conventional
1982-model Wayne-bodied International S-1800, marketed as the Lifeguard

The International Harvester/Navistar S-Series is a bus chassis manufactured by International Harvester (later Navistar International) as a range of trucks and stripped chassis. Produced from 1979 until 1989, the S-Series replaced the existing Loadstar. In 1989, the S-Series was replaced by the 2nd-generation of S-Series chassis, the 3800. This later lead to the creation of the International 3300, the basis for the IC Bus CE Series.

Variants

S-1700

Produced as a lighter-duty derivative of the S-1800.

S-1800

Standard-model chassis with a higher suspension weight capabilities.

1853FC

Forward-control chassis for use on Type D school buses, produced from 1981-1989.

Specifications

The S-1700 / S-1800 was available with either a gasoline or diesel powertrain. This was reflected in the model identifier, as models ending in '23' (S1723, S1823) indicated Gasoline engines, while models ending in '53' (S1753, S1853) denote diesel engines.

International S-Series powertrain details (1979-1989)

Engine name	Production	Fuel	Configuration	Transmission
International Harvester 345	1979-1986	Gasoline	345 cu in (5.7 L) V8	4-speed manual (S-1723 only) 5-speed manual* 4-speed automatic (optional all)
International Harvester 392			392 cu in (6.4 L) V8
International Harvester MV-404	1979-1982		404 cu in (6.6 L) V8
International Harvester MV-446			446 cu in (7.3 L) V8
International Harvester 9.0L V8	1980-1989	Diesel	551 cu in (9.0 L) V8
Navistar DT466E	1979-1989		466 cu in (7.6 L) I6 turbodiesel
International Harvester IDI	1983-1987		420 cu in (6.9 L) V8
	1986-1989		444 cu in (7.3 L) V8
Caterpillar 3208	1979-1981		636 cu in (10.4 L) V8 turbodiesel

^{*(optional on S-1723, standard on S-1753, S-1823/1853)}

Applications

Manufacturer	Model	Production	Notes
Blue Bird	Conventional	1979 - 1989	Replaced by International 3800
Carpenter Body Company	Classic	1979 - 1989
	Cavalier	1983 - 1988	Type D; 1853FC chassis
Superior	Pioneer	1979 - 1981
Thomas Built Buses	Conventional	1979 - 1989	Replaced by International 3800
Ward Body Works	Volunteer	1979 - 1989
	President	1981 - 1986	Type D; 1853FC chassis
Wayne Corporation	Lifeguard	1979 - 1989	Replaced by International 3800

Photo Gallery

• 
  An early-model Blue Bird-bodied International S-1800
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  A late-model Blue Bird-bodied International S-1800
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  A Thomas-bodied International S-1800
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  A Wayne-bodied International S-1800