Allis Chalmers S
General tractor information:
	Manufacturer:	Allis Chalmers
	Model:	S
	Type:	Farm/Agricultural tractor
	Years produced:	1937 - 1942
	Total built:	1,225
	Factory:	Springfield, Illinois, USA
	Original price:	-unknown-
Tractor power:
	Drawbar (rated):	48 hp [35.8 kW]
	Drawbar (max):	68.9 hp [51.4 kW]
	PTO (max):	84.3 hp [62.9 kW]
	PTO (rated):	66.64 hp [49.7 kW]
	Belt:	66 hp [49.2 kW]
Variants:
	S:	gasoline
	SO:	spark-ignition diesel
	WS:	wide
Engine:
	Manufacturer:	Allis Chalmers
	Fuel:	diesel
	Type:	vertical I-head
	Cylinders:	4
	Bore/Stroke:	5.75x6.50 inches [146 x 165 mm]
	Displacement:	675.1 ci [11.1 L]
	Compression:	6.5:1
	Rated RPMs:	1050
	Cooling:	liquid
	Torque:	-unknown-
	Firing order:	-unknown-
	Comments:	Oil engine, burned diesel with fuel injection and spark ignition, used on the SO model
Engine:
	Manufacturer:	Allis Chalmers
	Fuel:	gasoline
	Type:	vertical I-head
	Cylinders:	4
	Bore/Stroke:	5.75x6.50 inches [146 x 165 mm]
	Displacement:	675.1 ci [11.1 L]
	Compression:	5:1
	Rated RPMs:	1050
	Cooling:	liquid
	Torque:	-unknown-
	Firing order:	-unknown-
Transmission:
	Type:	-unknown-
	Forward:	5
	Reverse:	1
Mechanical:
	Chassis:	crawler
	Steering:	-unknown-
	Brakes:	-unknown-
Capacity:
	Fuel:	64 gal [242 L]
	Coolant:	50 qts [47.3 L]
Power Take-off (PTO):
Tires:
	Ag front:	tracks
	Ag rear:	tracks
Dimensions:
	Weight:	20,100 lbs [9117 kg]
	Wheelbase:	-unknown-
	Length:	146 inches [370 cm]
	Width:	97 inches [246 cm]
	Height:	74 inches [187 cm]
	Ground clearance:	-unknown-
Electrical:
	Volts:	6
Nebraska Tractor Test 337:
	Test Date:	November 1939
	Engine:	gasoline
	PTO (max):	84.3 hp [62.9 kW]
	PTO (rated eng speed):	66.64 hp [49.7 kW]
	PTO fuel use (rated):	11.7 hh/g [2.3 kWh/l]
	Drawbar (max):	68.9 hp [51.4 kW]
S Serial Numbers:
Location: transmission case or instrument panel
1937: 3
1938: 413
1939: 585
1940: 1085
1941: 1128
1942: 1212
Last: 1227
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Last updated on April 25, 2008