Introduction
Gibson Model I Row-Crop Tractor
Produced between 1948 and 1952 in Longmont, Colorado, the Gibson Model I is a row-crop tractor designed for mid-century agricultural operations. This two-wheel-drive machine features a six-cylinder gasoline engine and was engineered for standard field and cultivation tasks.
Engine and Performance
The tractor is powered by a liquid-cooled Hercules ZXD gasoline engine. This six-cylinder power plant has a displacement of 3.9 liters (236.7 cubic inches) with a bore and stroke of 87 x 105 mm. It operates at a rated speed of 1800 RPM. The engine cooling system has a capacity of 16.1 liters, and the intake air is filtered through an oil bath air cleaner.
Transmission and Drivetrain
The drivetrain utilizes a manual transmission providing four forward gears and one reverse gear. Power transfer from the engine to the transmission is managed by a 254 mm dry disc clutch. The tractor employs a bull gear final drive system to transfer power to the rear wheels.
Operational Features
The Model I is equipped with a live rear PTO (Power Take-Off) operating at 540 RPM with a 1.375-inch shaft, allowing for the operation of various implements. Control is managed via manual steering, and the tractor is equipped with mechanical band brakes. The operator station is of an open-platform design.
Dimensions and Chassis
The tractor sits on a 94-inch (238 cm) wheelbase with a total length of 127.25 inches (323 cm) and a height of 67 inches (170 cm). It offers a ground clearance of 25 inches (63 cm). The rear tread width is adjustable between 49 and 90 inches (124 to 228 cm), adapting to different row-crop spacings. Front tires are sized 5.50-16, while rear tire options include 10-38, 11-38, or 12-38 configurations.
Conclusion
The Gibson Model I represents a functional example of post-war American tractor design. With its 40 hp rating, adjustable tread width, and row-crop configuration, it was primarily intended for general field cultivation and utility work on small to medium-sized farms.
Production Information of Gibson, I
- Row-Crop tractor
- Built in Longmont, Colorado, USA
| Manufacturer | Gibson |
|---|
Dimension and Tires Information of Gibson, I
| Wheelbase | 94 inches [238 cm] |
|---|---|
| Rear tread | 49 to 90 inches [124 to 228 cm] |
| Ground clearance | 25 inches [63 cm] |
| Length | 127.25 inches [323 cm] |
| Height | 67 inches [170 cm] |
| Ag front | 5.50-16 |
|---|---|
| Ag front(optional) | 12-38 |
| Ag rear | 10-38 |
| Ag rear | 11-38 |
Engine Specifications of Gibson, I
- Hercules ZXD
- Liquid-cooled
- Gasoline
- 6-cylinder
| Coolant capacity | 17 qts [16.1 L] |
|---|---|
| Displacement | 236.7 ci [3.9 L] |
| Compression | 6.71:1 |
| Bore/Stroke | 3.4375x4.125 inches [87 x 105 mm] |
| Starter volts | 6 |
| Rated RPM | 1800 |
| Air cleaner | Oil bath |
Transmission Information of Gibson, I
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 4 forward and 1 reverse |
| Clutch | 254mm dry disc |
Mechanical Specs of Gibson, I
- Two-wheel drive
- Open operator station.
- Mechanical band brakes
- Manual steering
| Final drives | Bull gear |
|---|
Power Information of Gibson, I
| Rear PTO | Live |
|---|---|
| Rear PTO Type | 540 (1.375) |
Where it sits
With 40 hp[P] HP, the Gibson I sits just above H (27 HP) in Gibson's range. Its power puts it in the 65th percentile of 1940s models in our database (263 machines).
Frequently asked questions
How much horsepower does the Gibson I have?
The Gibson I delivers 40 hp[P] HP.
What years was the Gibson I produced?
The Gibson I was produced in 1948-1952.
What engine does the Gibson I have?
The Gibson I is powered by a Gasoline, 6-cylinder engine.
What transmission does the Gibson I use?
The Gibson I uses a Gear transmission.
Is the Gibson I 4WD?
The Gibson I is available in 2WD.