Search
Find your tractor.
Menu ☰
Years in Production / 1958–1961
Oliver
990
Explore the specifications, hardware, and original references for the Oliver 990.
93hp
Engine estimate · from PTO
2WD Only
Drive
1958–1961
Production years
Oliver
Manufacturer
990 / 01
At a glance
Production
Standard-tread tractor
Built in Charles City, Iowa, USA
Original price was $8,200 in 1961
The Oliver 990 was also sold as the Massey Ferguson 98 (with different sheet metal, paint, and seat).
- Manufacturer
- Oliver
Mechanical
Two-wheel drive
Disc brakes
Open operator station.
- Steering
- power
Pto
- Rear Pto
- independent OptOptional
- Rear Type
- 540
Belt Pulley
- Diameter
- 12.25 inches31 cm
- Width
- 9 inches22 cm
- Rpm
- 1021
- Speed
- 3277 ft/min998.83 meters/min
990 / 02
Under the hood
Engine Detail
General Motors 3-71
blower diesel
3-cylinder
liquid-cooled
two-cycle engine with mechanical blower
- Displacement
- 213 ci3.5 L
- Bore Stroke
- 4.25x5.00 inches108 x 127 mm
- Compression Ratio
- 17:1
- Rated Rpm
- 1800
- Starter Volts
- 12
- Cylinders
- 3
- Cooling
- liquid-cooled
990 / 03
Gears & controls
Transmission
- Transmission Type
- gear
- Gears
- 6 forward and 2 reverse
- Clutch
- dry disc
990 / 04
Size. Stance. Footprint.
Dimensions And Tires
- Wheelbase
- 79.875 inches202 cm
- Weight
- 11,000 lbs4989 kg
- Front Tire
- 7.50-18
- Rear Tire
- 18-26
Tires And Tracks
- Front Ag
- 7.50-18
- Rear Ag
- 18-26
- Rear Ag
- 14-34
- Rear Ag
- 15-34
990 / 05
Tractor Photos
See it in action
Videos
Watch Oliver 990 videos from their original YouTube creators.
990 / 07
Tests (NTTL)
Nebraska Tractor Test 661
Diesel 6-speed 2WDJuly 7 - 18, 1958
Drawbar performance
Gear 3 used for power test.
Gear 1 used for pull test.
- Id
- 661
- Belt Power Max
- 84.10 hp62.7 kW
- Belt Fuel Use Max
- 6.3 gal/hour23.8 l/hour
- Max Power
- 61.46 hp45.8 kW
- Fuel Use
- 5.0 gal/hour18.9 l/hour
- Max Pull
- 12629 lbs5728 kg