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The 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
|Wheel base||2,020 mm (79.5 in)|
|Weight||4,989 kg (10,999 lbs)|
|Fuel tank capacity||–|
|Cabin type||Open operator station|
|Engine model||General Motors 3-71|
|Engine type||Four-stroke, liquid-cooled, inline|
|Displacement||3.5 L, 3,490 cm2, (213.0 cu·in)|
|Bore and stroke||108.0 mm X 127.0 mm (4.25 in X 5 in)|
|Horsepower||62.3 PS (45.8 kW; 61.4 HP) at 1800 rpm|
|Transmission and chassis|
|Transmission type||Gear type with dry disc clutch|
|Gears||6 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 type||Independent|
|Rear PTO speed||540 rpm|
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