International-Harvester S-Series (School Bus)

The International S-Series "Schoolmaster" was a Type C (conventional) bus chassis manufactured by International Harvester, which became Navistar during its production run. It was introduced in 1979 as the replacement for the Loadstar bus chassis; it was used for both school bus and commercial bus applications. In 1989, it was replaced by the International 3800; both chassis were offered that year. The Schoolmaster was the last bus chassis designed by International Harvester.

International-Harvester S-Series "Schoolmaster"
International-Harvester S-Series bodied by Wayne
Manufacturer	International
Production	1978-1989
Body Manufacturer	See Listing
Class	School Bus Transit Bus
Engines	Gasoline International Harvester 345 cubic-inch V8 (1979-1986) International Harvester 392 c.i. V8 (1979-1986) International Harvester MV-404 6.6 liter V8 (1979-1981) International Harvester MV-446 7.3 liter V8 (1979-1981) (gasoline ancestor of the International Harvester IDI engine) Diesel V8 International Harvester 9.0 L (551 cu in) V8 (1979-1987) D-150/170/190 (September 1978-December 1979) 9.0L (January 1980-1987) International Harvester IDI 6.9 L (420 cu in) (1983-1987) International Harvester IDI 7.3 L (444 cu in) (1986-1989) Caterpillar 3208 10.4 L (636 cu in) (1979-1981) Inline-6 International Harvester DT360 5.9 L (360 cu in) (1987-1989) International Harvester DT466 7.6 L (466 cu in) (1979-1989)
Related	International-Harvester S-Series
Sucessor	International 3800 International 3900 FE (For International 1853-FC)

Variants

International-Harvester S-Series "Schoolmaster" Variants
Model Names	S1700		S1800		1853-FC
	S1723	S1753	S1823	S1853
Fuel Type	Gasoline	Diesel	Gasoline	Diesel	Diesel
Years Produced	1979-1986	1979-1989	1979-1981	1979-1989	1981-1989

The Regular S-Series

A Rare International 1853-FC

List of body manufacturers

Manufacturer	Model Name	Production	Variants	Notes
Blue Bird	Conventional	1979-1989	S1700 S1800
Carpenter	Classic Cavalier	1979-1989	S1700 S1800 1853-FC	The Cavalier was a transit-style bus that used the 1853FC chassis from 1983-1988
Gillig Corporation		1979-1981	S1700 S1800	The last Gillig Type C bus was built in 1981; very few were produced
New Bus Company		1988-1989	S1700 S1800
Superior Coach Company	Pioneer	1979-1985	S1700 S1800	Superior ended production of Type C buses in 1985 to concentrate on Type A buses (see Mid Bus)
Thomas Built Buses	Conventional	1979-1989	S1700 S1800
Ward Body Works	Volunteer President	1979-1989	S1700 S1800 1853-FC	Non-school bus versions of the Volunteer built after 1980 were sold under the AmTran name. The President was a transit-style school bus that used the 1853FC chassis from 1981-1986.
Wayne Corporation	Lifeguard	1979-1989	S1700 S1800