Introduction
Oliver 990: Standard-Tread Agricultural Tractor
Produced between 1958 and 1961 in Charles City, Iowa, USA, the Oliver 990 is a standard-tread tractor designed for heavy-duty agricultural operations. Part of the 950 and 995 series, this model was also marketed as the Massey Ferguson 98, featuring distinct styling adjustments.
Engine and Performance
The tractor is powered by a General Motors 3-71, 3-cylinder liquid-cooled blower diesel engine. This two-cycle powerplant features a mechanical blower, a 213 cubic inch (3.5 L) displacement, and a 17:1 compression ratio, delivering 93 horsepower at a rated 1800 RPM.
Transmission and Drivetrain
The power is managed through a manual transmission offering 6 forward and 2 reverse gears, coupled with a dry disc clutch. The unit utilizes a two-wheel-drive system, providing reliable traction for field operations.
Mechanical and Hydraulic Features
Operational control is facilitated by power steering and disc brakes. The tractor features an open operator station and offers an optional independent rear Power Take-Off (PTO) running at 540 RPM, allowing for the connection of various implements.
Dimensions and Weight
The machine has a wheelbase of 79.875 inches (202 cm) and a total weight of 11,000 lbs (4989 kg). It is equipped with 7.50-18 front tires and 18-26 rear tires, with a front tread width of 59.9 inches (152 cm) and a rear tread width of 66 inches (167 cm).
Conclusion
The Oliver 990 is a robust, high-horsepower tractor tailored for farmers requiring a reliable, standard-tread machine for general field work. Its mechanical simplicity and substantial build quality make it a notable piece of mid-century agricultural engineering.
Production Information of Oliver, 990
- The Oliver 990 was also sold as the Massey Ferguson 98 (with different sheet metal, paint, and seat).
- Original price was $8,200 in 1961
- Standard-tread tractor
- Built in Charles City, Iowa, USA
| Manufacturer | Oliver |
|---|
Dimension and Tires Information of Oliver, 990
| Wheelbase | 79.875 inches [202 cm] |
|---|---|
| Rear tread | 66 inches [167 cm] |
| Weight | 11,000 lbs [4989 kg] |
| Front tread | 59.9 inches [152 cm] |
| Ag front | 7.50-18 |
|---|---|
| Ag front(optional) | 15-34 |
| Ag rear | 18-26 |
| Ag rear(optional) | 14-34 |
Engine Specifications of Oliver, 990
- General Motors 3-71
- Two-cycle engine with mechanical blower
- Liquid-cooled
- Blower diesel
- 3-cylinder
| Bore/Stroke | 4.25x5.00 inches [108 x 127 mm] |
|---|---|
| Compression | 17:1 |
| Displacement | 213 ci [3.5 L] |
| Starter volts | 12 |
| Rated RPM | 1800 |
Transmission Information of Oliver, 990
Transmission variants 1
| Type | Gear |
|---|---|
| Gears | 6 forward and 2 reverse |
| Clutch | Dry disc |
Mechanical Specs of Oliver, 990
- Two-wheel drive
- Open operator station.
- Disc brakes
| Steering | Power |
|---|
Power Information of Oliver, 990
| Rear PTO(optional) | Independent |
|---|---|
| Rear PTO Type | 540 |
Where it sits
With 93 hp[P] HP, the Oliver 990 sits between 950 (66 HP) and 995 (94 HP) in Oliver's range. Its power puts it in the 95th percentile of 1950s models in our database (592 machines).
Frequently asked questions
How much horsepower does the Oliver 990 have?
The Oliver 990 delivers 93 hp[P] HP.
What years was the Oliver 990 produced?
The Oliver 990 was produced in 1958-1961.
What engine does the Oliver 990 have?
The Oliver 990 is powered by a Blower diesel, 3-cylinder engine.
What transmission does the Oliver 990 use?
The Oliver 990 uses a Gear transmission.
How much does the Oliver 990 weigh?
The Oliver 990 weighs 11,000 lbs [4989 kg].
Is the Oliver 990 4WD?
The Oliver 990 is available in 2WD.