Oliver 990

Oliver 990The Oliver 990 is a 2WD standard-tread tractor from the 900 series. This tractor was manufactured by Oliver in Charles City, Iowa, USA from 1958 to 1961. The Oliver 990 is equipped with a 3.5 L (213.0 cu·in) three-cylinder diesel engine and a gear type transmission with 6 forward and 2 reverse gears.

The Oliver 990 standard-tread tractor used the General Motors 3-71 engine. It is a 3.5 L, 3,490 cm2, (213.0 cu·in) three-cylinder natural aspirated diesel engine with 108.0 mm (4.25 in) of the cylinder bore and 127.0 mm (5 in) of the piston stroke. The compression ratio rating is 17.0:1. This engine produced 62.3 PS (45.8 kW; 61.4 HP) at 1800 rpm of output power.

The Oliver 990 is equipped with power steering, disc brakes, and an open operator station.

Oliver 990 Specifications

General Specifications
ModelOliver 990
Wheel base2,020 mm (79.5 in)
Weight4,989 kg (10,999 lbs)
Fuel tank capacity
Cabin typeOpen operator station
Engine modelGeneral Motors 3-71
Engine typeFour-stroke, liquid-cooled, inline
Fuel typeDiesel
Displacement3.5 L, 3,490 cm2, (213.0 cu·in)
Bore and stroke108.0 mm X 127.0 mm (4.25 in X 5 in)
Compression ratio17.0:1
Horsepower62.3 PS (45.8 kW; 61.4 HP) at 1800 rpm
Transmission and chassis
Chassis4×2 2WD
Steering typePower
Transmission model
Transmission typeGear type with dry disc clutch
Gears6 forward and 2 reverse
Speed Forward: 19.6 kmh (12.2 mph) Reverse: 7.4 kmh (4.6 mph)
Front tires Ag: 7.50-18
Rear tires Ag: 18-26, 14-34, 15-34
PTO (Power take-off shaft)
Rear PTO typeIndependent
Rear PTO speed540 rpm
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