Oliver 990: all source data
All 47 values recorded for this model, as the source lists them and in its units. The spec sheet shows the same data checked, typed and converted.
Overview
Production| Manufacturer | Oliver |
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| (no label) | Standard-tread tractor |
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| (no label) | Built in Charles City, Iowa, USA |
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| (no label) | Original price was $8,200 in 1961 |
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| (no label) | The Oliver 990 was also sold as the Massey Ferguson 98 (with different sheet metal, paint, and seat). |
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Engine| (no label) | General Motors 3.5L 3-cyl diesel |
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Transmission| (no label) | 6-speed gear |
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Power| Drawbar (claimed) | 61.4 hp | 45.8 kW |
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| PTO (claimed) | 84.1 hp | 62.7 kW |
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| Plows | 6 |
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| Drawbar (tested) | 61.46 hp | 45.8 kW |
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| Belt (tested) | 84.10 hp | 62.7 kW |
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Mechanical| (no label) | Two-wheel drive |
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| Steering | power |
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| (no label) | Disc brakes |
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| (no label) | Open operator station. |
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Pto| Rear PTO | independent |
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| Rear PTO Type | 540 |
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Dimensions| Wheelbase | 79.875 inches | 202 cm |
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| Weight | 11,000 lbs | 4989 kg |
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| Front tire | 7.50-18 |
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| Rear tire | 18-26 |
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Belt pulley| Diameter | 12.25 inches | 31 cm |
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| Width | 9 inches | 22 cm |
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| RPM | 1021 |
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| Speed | 3277 ft/min | 998.83 meters/min |
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Engine
Engine detail| (no label) | General Motors 3-71 |
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| (no label) | blower diesel |
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| (no label) | 3-cylinder |
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| (no label) | liquid-cooled |
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| (no label) | two-cycle engine with mechanical blower |
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| Displacement | 213 ci | 3.5 L |
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| Bore/Stroke | 4.25x5.00 inches | 108 x 127 mm |
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| Compression | 17:1 |
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| Rated RPM | 1800 |
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| Starter volts | 12 |
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Transmission
Transmission| Type | gear |
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| Gears | 6 forward and 2 reverse |
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| Clutch | dry disc |
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Dimensions
Tires| Ag front | 7.50-18 |
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| Ag rear | 18-26 |
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| Ag rear | 14-34 |
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| Ag rear | 15-34 |
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Dimensions| Wheelbase | 79.875 inches | 202 cm |
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| Weight | 11,000 lbs | 4989 kg |
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| Front tread | 59.9 inches | 152 cm |
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| Rear tread | 66 inches | 167 cm |
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