Technical Specifications of the David Brown 1490 agricultural tractor:
David Brown 1490 agricultural tractor was produced from 1980 to 1984. It is equipped with a DB AD4/55T engine, consisting of four cylinders with a turbocharger, with a displacement of 3594 cm³. The piston dimensions are 100 mm, and the piston stroke is 114.3 mm. The engine reaches a maximum power of 83 HP at 2300 RPM and a torque of 284 Nm at 1600 RPM. The tractor has 12 forward gears and 4 reverse gears, allowing a speed range from 1.9 km/h to 26.8 km/h, with a maximum speed of 29.8 km/h. The hydraulic pump has a capacity of 33 liters per minute. The rear hitch is mechanically controlled and has a maximum lifting capacity of 2160 kg. The power take-off (PTO) operates at speeds of 540 and 1000 RPM. David Brown 1490 is equipped with a hydraulically controlled braking system. The turning radius is 8 meters for the 2WD version and 9.8 meters for the 4WD version. The front tires are sized 11L-15 in the 2WD version and 12.4-24 in the 4WD version, while the rear tires are 16.9-34 for both versions. The total weight is 3300 kg for the 2WD version and 3800 kg for the 4WD version. The tractor height with cab is 269 cm, the length is 384 cm, and the width is 225 cm. The fuel tank capacity is 135 liters, and the noise level in the cab is 83 dB.
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Technical Data Sheet for David Brown 1490, 1690 Hydra Shift agricultural tractors:
| Model | David Brown 1490 | David Brown 1490 Hydra Shift | David Brown 1690 | David Brown 1690 Hydra Shift |
| Years of production | 80-84 | 80-84 | 80-83 | 80-83 |
| Engine model / type | DB AD4/55T | DB AD4/55T | DB AD6/55 | DB AD6/55 |
| Number of cylinders / turbocharging | 4T | 4T | 6 | 6 |
| Engine displacement (cm3) | 3594 | 3594 | 5392 | 5392 |
| Piston dimension / stroke (mm) | 100×114,3 | 100×114,3 | 100×114,3 | 100×114,3 |
| Maximum engine power (hp) / rpm | 83/2300 | 83/2300 | 103/2300 | 103/2300 |
| Torque (Nm) / rpm | 284/1600 | 284/1600 | 359/1500 | 359/1500 |
| Number of gears (front + rear) | 12+4 | 12+4 | 12+4 | 12+4 |
| Number of synchronized gears (front+rear) | – | – | – | – |
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| Speed-Shift | – | – | – | – |
| Type of reverse | – | – | – | – |
| Driving speed (km/h) | 1,9-26,8 | 1,7-25,7 | 1,9-25,8 | 2,5-27,3 |
| Max Driving speed (km/h) | 29,8 | 27 | 30,7 | 29 |
| Hydraulic pump capacity (L/min) | 33 | 33 | 41,5 | 41,5 |
| 3-Point Hitch control | mech | mech | mech | mech |
| 3-point hitch max load (kg) | 2160 | 2160 | 3630 | 3630 |
| PTO speed (rpm) | 540/1000 | 540/1000 | 540/1000 | 540/1000 |
| Disc brake type (dry / wet) | – | – | – | – |
| Type of control of the braking system | hydr | hydr | hydr | hydr |
| Turning radius 2WD (m) | 8 | 8 | 9 | 9 |
| Turning radius 4WD (m) | 9,8 | 11,4 | 11,4 | – |
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| 11L-15 | 11L-15 | 10,00-16 | 10,00-16 | |
| Front wheel 4WD | 12,4-24 | 14,9-24 | 14,9-24 | – |
| Rear wheel 2WD | 16,9-34 | 16,9-34 | 18,4-34 | 18,4-34 |
| Rear wheel 4WD | 16,9-34 | 16,9-38 | 16,9-38 | – |
| 2WD total weight (kg) | 3300 | 3300 | 4090 | 4090 |
| 4WD total weight (kg) | 3800 | 4390 | 4390 | – |
| Total height with cabin (cm) | 269 | 269 | 269 | 269 |
| Total length (cm) | 384 | 384 | 420 | 420 |
| Total width (cm) | 225 | 225 | 254 | 254 |
| Fuel tank capacity (l) | 135 | 135 | 150 | 150 |
| Cabin sound level (dB) | 83 | 83 | 85 | 85 |
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