Tractor · 1958Unverified
Oliver 990
Oliver 990 — 900 Series · 84 hp. Reference specifications; pending source verification.
Provisional listing — the headline figure is shown; full specifications are auto-generated and pending verification against published sources.
Rated power
84 hp
Max power
45.8 kW
Weight
4989 kg
Hover a source tag to verify
Overview
ManufacturerOliverReference
Standard-tread tractorReference
Built in Charles City, Iowa, USAReference
Original price was $8,200 in 1961Reference
The Oliver 990 was also sold as the Massey Ferguson 98 (with different sheet metal, paint, and seat).Reference
Two-wheel driveReference
SteeringpowerReference
Disc brakesReference
Open operator station.Reference
Variants
990gear driveReference
995torque converterReference
Engine
General Motors 3.5L 3-cyl dieselReference
Drawbar (claimed)45.8 kWReference
Plows6Reference
Drawbar (tested)45.8 kWReference
Belt (tested)62.7 kWReference
General Motors 3-71Reference
blower dieselReference
3-cylinderReference
liquid-cooledReference
two-cycle engine with mechanical blowerReference
Displacement3.5 LReference
Bore/Stroke108 x 127 mmReference
Compression17:1Reference
Rated RPM1800Reference
Starter volts12Reference
Belt power (max)62.7 kWReference
Max power45.8 kWReference
Transmission
6-speed gearReference
TypegearReference
Gears6 forward and 2 reverseReference
Clutchdry discReference
PTO & Hydraulics
PTO (claimed)62.7 kWReference
Rear PTOindependentReference
Rear PTO Type540Reference
Dimensions
Wheelbase202 cmReference
Weight4989 kgReference
Front tire7.50-18Reference
Rear tire18-26Reference
Ag front7.50-18Reference
Ag rear18-26Reference
Ag rear14-34Reference
Ag rear15-34Reference
Front tread152 cmReference
Rear tread167 cmReference
990 Serial Numbers
195867828Reference
195971245Reference
196084487Reference
1961110064Reference
Final115469Reference
FAQ: How to read a serial number table.Reference
Capacities
Diameter31 cmReference
Width22 cmReference
RPM1021Reference
Speed998.83 meters/minReference
Test results
Diesel 6-speed 2WDJuly 7 - 18, 1958Link: Nebraska Tractor Test 661 fileReference
Belt fuel use (max)23.8 l/hourReference
Drawbar performanceReference
Fuel use18.9 l/hourReference
Gear 3 used for power test.Reference
Max pull5728 kgReference
Gear 1 used for pull test.Reference
Values normalized to UK metric units. Every figure is traced to at least one source; verified specs are cross-checked against two or more.