Introduction
International Harvester Farmall F-20
The Farmall F-20 is a row-crop tractor manufactured by International Harvester in Rock Island, Illinois, between 1932 and 1939. Marketed as the 'Increased-Power Farmall', it succeeded earlier models and served as a standard utility tractor for mid-sized agricultural operations during the 1930s.
Engine and Power
The tractor is powered by an International Harvester vertical I-head 4-cylinder engine with a displacement of 220.9 cubic inches (3.6 liters). It operates at a rated speed of 1200 RPM, producing 29 horsepower. The engine is liquid-cooled, utilizing a cooling system capacity that varied between 40 quarts for early models and 29 quarts for later production units.
Transmission and Drivetrain
The F-20 utilizes a sliding gear transmission providing four forward speeds and one reverse gear. Power is transferred through a 279.4 mm (11-inch) mechanical dry disc clutch. The machine is configured as a two-wheel-drive tractor, featuring manual steering and mechanical band brakes for operator control.
PTO and Hydraulics
The tractor is equipped with a rear Power Take-Off (PTO) shaft operating at a standard speed of 540 RPM. The PTO engagement is synchronized with the engine speed, specifically rated at 505 RPM at the engine's 1200 RPM setting, utilizing a 1.125-inch spline shaft.
Dimensions and Chassis
With a wheelbase of 85 inches (215 cm) and a total length of 140 inches (355 cm), the F-20 maintains a compact footprint. The operating weight is approximately 4,400 lbs (1,995 kg). It features an open operator station and was historically offered with various steel wheel configurations, including 25x4 front and 40x6 or 42x12 rear wheels.
Conclusion
With 154,398 units produced, the Farmall F-20 represents a significant period in agricultural mechanization. Its design prioritized row-crop versatility and mechanical simplicity, making it a staple of American farming operations throughout the 1930s.
Production Information of Farmall, F-20
- Original price was $1000 in 1936
- Row-Crop tractor
- The Farmall F-20 was originally advertised as the "Increased-Power Farmall", and was similar to the orginal Farmall. The tractor paint scheme changed from gray to red on November 1, 1936 (the beginning of the 1937 production year). A number of F-20s were built in early 1934 using the Farmall Regular rear end and F-20 engine. These tractors are identified by a TA serial number prefix.
- Built in Rock Island, Illinois, USA
| Manufacturer | Farmall (a part of International Harvester) |
|---|---|
| Total built | 154,398 |
Dimension and Tires Information of Farmall, F-20
| Front tread | 8.5 inches [21 cm] |
|---|---|
| Wheelbase | 85 inches [215 cm] |
| Height (hood) | 58 inches [147 cm] |
| Height (steering wheel) | 67 inches [170 cm] |
| Length | 140 inches [355 cm] |
| Rear tread | 74 inches [187 cm] |
| Weight | 4400 lbs [1995 kg] |
| Width | 86 inches [218 cm] |
| Rear tread | 57 inches [144 cm ] |
Narrow and Fairway model F-20
| Ag front | 25x4 (steel) |
|---|---|
| Ag front(optional) | 9.00x36 |
| Ag rear | 40x6 (steel) |
| Ag rear(optional) | 42x12 (steel) |
Engine Specifications of Farmall, F-20
- International Harvester
- Liquid-cooled vertical I-head
- Distillate
- 4-cylinder
| Rated RPM | 1200 |
|---|---|
| Displacement | 220.9 ci [3.6 L] |
| Firing order | 1-3-4-2 |
| Bore/Stroke | 3.75x5.00 inches [95 x 127 mm] |
| Bore/Stroke(optional) | 29 qts (late) [27.4 L] |
| Coolant capacity | 40 qts (early) [37.9 L] |
Transmission Information of Farmall, F-20
Transmission variants 1
| Type | Sliding gear |
|---|---|
| Gears | 4 forward and 1 reverse |
| Clutch | 279.4mm mechanical dry disc |
Mechanical Specs of Farmall, F-20
- Two-wheel drive
- Open operator station.
- Manual steering
- Mechanical band brakes
Power Information of Farmall, F-20
| Rear PTO | Transmission |
|---|---|
| Rear PTO Type | 540 (1.125) |
| Engine RPM | 505@1200 |
Where it sits
With 29 hp[P] HP, the Farmall F-20 sits between H (26 HP) and F-30 (33 HP) in Farmall's range. Its power puts it in the 37th percentile of 1930s models in our database (235 machines).
Frequently asked questions
How much horsepower does the Farmall F-20 have?
The Farmall F-20 delivers 29 hp[P] HP.
What years was the Farmall F-20 produced?
The Farmall F-20 was produced in 1932-1939.
What engine does the Farmall F-20 have?
The Farmall F-20 is powered by a 4-cylinder engine.
What transmission does the Farmall F-20 use?
The Farmall F-20 uses a Sliding gear transmission.
How much does the Farmall F-20 weigh?
The Farmall F-20 weighs 4400 lbs [1995 kg].
Is the Farmall F-20 4WD?
The Farmall F-20 is available in 2WD.