J.I. Case 20-40

The J.I. Case 20-40 is a tractor produced by J I Case. It is equipped with a 1082 ci 17.7 L engine. The rated power output is 42.80 hp 31.9 kW. Transmission: J.I. Case. Operating weight: 13,900 lbs 6305 kg.

Overview

	1912 - 1919 Standard-tread tractor
1912 - 1919
Standard-tread tractor

Production
Manufacturer	J.I. Case
Standard-tread tractor
Built in Racine, Wisconsin, USA
Total built	4,465
Original price	$2,100 (1916)

J.I. Case 20-40 Transmission
2-speed gear
Transmission details ...

J.I. Case 20-40 Power
Drawbar (claimed)	20 hp 14.9 kW
Belt (claimed)	40 hp 29.8 kW
Drawbar (tested)	24.66 hp 18.4 kW
Belt (tested)	42.80 hp 31.9 kW
Performance test details ...

Mechanical
Two-wheel drive
Steering	manual
Open operator station. Optional four-post steel cab.

Dimensions & Tires
Weight	13,900 lbs 6305 kg
Front tire	38x8
Rear tire	66x20
Full dimensions and tires ...

Belt Pulley
Diameter	24 inches 60 cm
Width	8.5 inches 21 cm

References
Power Farming Machinery published in 1919, by J.I. Case

Engine

Engine options
J.I. Case 12.4L 2-cyl kerosene
J.I. Case 14.8L 2-cyl kerosene
J.I. Case 17.7L 2-cyl kerosene

Engine Detail — 755 ci / 12.4 L Kerosene

Manufacturer	J.I. Case
Fuel Type	Kerosene
Configuration	2-cylinder, liquid-cooled opposed-twin
The original engine, was used on the first model 40 tractors produced in 1912.
Displacement	755 ci 12.4 L
Bore/Stroke	7.75x8.00 inches 197 x 203 mm
Rated RPM	450
Starter type	hand-crank

Engine Detail — 904 ci / 14.8 L Kerosene

Manufacturer	J.I. Case
Fuel Type	Kerosene
Configuration	2-cylinder, liquid-cooled opposed-twin
The 8-inch bore engine replaced the original engine early in production, at the end of 1912.
Displacement	904 ci 14.8 L
Bore/Stroke	8.00x9.00 inches 203 x 229 mm
Rated RPM	475
Starter type	hand-crank
Coolant capacity	112 qts 106.0 L

Engine Detail — 1082 ci / 17.7 L Kerosene

Manufacturer	J.I. Case
Fuel Type	Kerosene
Configuration	2-cylinder, liquid-cooled
The final, 8.75-inch bore, engine replaced the 8-inch around 1916. Case did not re-rate the horsepower of the tractor, despite a 20% increase in displacement.
Displacement	1082 ci 17.7 L
Bore/Stroke	8.75x9.00 inches 222 x 229 mm
Rated RPM	475
Starter type	hand-crank

Transmission

Transmission — J.I. Case

Transmission	J.I. Case
Type	gear
Gears	2 forward and 1 reverse

Dimensions

J.I. Case 20-40 Tires
Ag front	38x8 steel
Ag rear	66x20 steel

Dimensions
Length	177 inches 449 cm
Width	100 inches 254 cm
Height	107 inches 271 cm
Operating weight	13,900 lbs 6305 kg
Rear axle	3.94 inch diameter 100 mm

Tests

Nebraska Tractor Test 7
1082ci kerosene 2-speed 2WD April 10 - May 7, 1920 Link: Nebraska Tractor Test 7 file
Belt power (max)	42.80 hp 31.9 kW
Belt fuel use (max)	7.7 gal/hour 29.1 l/hour
Drawbar performance
Max power	24.66 hp 18.4 kW
Max pull	5,537 lbs 2511 kg