Introduction
Oliver 77 Row-Crop Tractor
The Oliver 77 is a row-crop tractor produced between 1948 and 1954 in Charles City, Iowa, USA. As part of the Oliver series, it was designed to serve as a versatile workhorse for mid-century agricultural operations, offering a power output of 37 horsepower.
Engine and Performance
The tractor is powered by a liquid-cooled, 6-cylinder Waukesha-Oliver engine with a displacement of 193.9 cubic inches (3.2 liters). It operates on LP gas with a compression ratio of 6.75:1 and is rated at 1600 RPM. The engine utilizes an oil bath air cleaner to maintain performance in dusty field conditions, and the cooling system has a capacity of 18 quarts (17.0 liters).
Transmission and Drivetrain
The powertrain features an unsynchronized gear transmission providing 6 forward speeds and 2 reverse speeds. Power is transferred through a dry disc clutch. The tractor utilizes a two-wheel drive configuration, ensuring reliable traction for standard row-crop applications.
Operating Systems and PTO
Steering is managed manually, and braking is provided by differential mechanical drum brakes. The rear PTO is available as an independent optional feature, operating at a standard 540 RPM through a 1.375-inch shaft, allowing for the operation of various implements.
Dimensions and Chassis
The tractor features a wheelbase of 90.75 inches (230 cm) and a total length of 139.25 inches (353 cm). It offers a ground clearance of 24.9 inches (63 cm), which is suitable for row-crop clearance. The front tread is adjustable between 60 and 89.75 inches for wide-front configurations, while the rear tread can be adjusted from 60 to 92.5 inches to accommodate different row widths.
Conclusion
The Oliver 77 is a robust, mechanically straightforward tractor designed for the row-crop farming demands of the late 1940s and early 1950s. Its combination of a 6-cylinder engine and adjustable tread widths made it a flexible tool for mid-sized agricultural tasks.
Production Information of Oliver, 77
- Original price was $3,000 in 1954
- Row-Crop tractor
- Built in Charles City, Iowa, USA
| Manufacturer | Oliver |
|---|
Dimension and Tires Information of Oliver, 77
| Front tread | 7.5/12.6 inches [19/32 cm (tricycle)] |
|---|---|
| Wheelbase | 90.75 inches [230 cm] |
| Height (hood) | 61.625 inches [156 cm] |
| Height | 75 inches [190 cm] |
| Length | 139.25 inches [353 cm] |
| Front tread | 60 to 89.75 inches [152 to 227 cm (wide-front)] |
| Ground clearance | 24.9 inches [63 cm] |
| Width | 80.25 inches [203 cm] |
| Rear tread | 60 to 92.5 inches [152 to 234 cm] |
| Ag front | 5.50-16 |
|---|---|
| Ag front(optional) | 12-38 |
| Ag rear | 10-38 |
| Ag rear(optional) | 11-38 |
Engine Specifications of Oliver, 77
- Waukesha-Oliver
- Liquid-cooled
- LP gas
- 6-cylinder
| Coolant capacity | 18 qts [17.0 L] |
|---|---|
| Displacement | 193.9 ci [3.2 L] |
| Compression | 6.75:1 |
| Bore/Stroke | 3.3125x3.75 inches [84 x 95 mm] |
| Coolant capacity | 18 qts [17.0 L] |
| Starter volts | 6 |
| Rated RPM | 1600 |
| Air cleaner | Oil bath |
Transmission Information of Oliver, 77
Transmission variants 1
| Type | Unsynchronized gear |
|---|---|
| Gears | 6 forward and 2 reverse |
| Clutch | Dry disc |
Mechanical Specs of Oliver, 77
- Two-wheel drive
- Open operator station.
- Differential mechanical drum brakes
| Steering | Manual |
|---|
Power Information of Oliver, 77
| Rear PTO(optional) | Independent |
|---|---|
| Rear PTO Type | 540 (1.375) |
Where it sits
With 37 hp[B] HP, the Oliver 77 sits between 70 (33 HP) and 88 (46 HP) in Oliver's range. Its power puts it in the 56th percentile of 1940s models in our database (263 machines).
Frequently asked questions
How much horsepower does the Oliver 77 have?
The Oliver 77 delivers 37 hp[B] HP.
What years was the Oliver 77 produced?
The Oliver 77 was produced in 1948-1954.
What engine does the Oliver 77 have?
The Oliver 77 is powered by a LP gas, 6-cylinder engine.
What transmission does the Oliver 77 use?
The Oliver 77 uses a Unsynchronized gear transmission.
Is the Oliver 77 4WD?
The Oliver 77 is available in 2WD.