Technical Specifications of the David Brown Implematic 850 agricultural tractor:
David Brown 850 Implematic agricultural tractor was produced from 1960 to 1963. It is equipped with a DB AD4/30 engine, consisting of four cylinders, without a turbo and intercooler, with a displacement of 2523 cm³. The piston dimensions are 88.9 mm, and the piston stroke is 101.6 mm. The engine reaches a maximum power of 37 HP at 2000 RPM and a torque of 149 Nm at 1175 RPM. The tractor has 6 forward gears and 2 reverse gears, allowing a speed range from 3.5 km/h to 24.0 km/h, with a maximum speed of 27 km/h. The hydraulic pump has a capacity of 22.7 liters per minute. The rear hitch is mechanically controlled and has a maximum lifting capacity of 1000 kg. The power take-off (PTO) operates at speeds of 540 and 1000 RPM. David Brown 850 Implematic is equipped with a mechanically controlled braking system. The turning radius is 4.8 meters for the 2WD version. The front tires are sized 5.50-16, while the rear tires are 11.2/10-28. The total weight is 1580 kg for the 2WD version. The tractor height with cab is 130 cm, the length is 290 cm, and the width is 191 cm.
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Technical Data Sheet for David Brown Implematic 850, 880, 900 agricultural tractors:
| Model | David Brown 850 | David Brown 880 | David Brown 900 |
| Years of production | 60-63 | 62-64 | 56-58 |
| Engine model / type | DB AD4/30 | – | |
| Number of cylinders / turbocharging | 4 | 4 | 4 |
| Engine displacement (cm3) | 2523 | 2705 | 2705 |
| Piston dimension / stroke (mm) | 88,9×101,6 | 92,1×101,6 | 92,1×101,6 |
| Maximum engine power (hp) / rpm | 37/2000 | 43/2000 | 40/2000 |
| Torque (Nm) / rpm | 149/1175 | 169/1200 | – |
| Number of gears (front + rear) | 6+2 | 6+2/12+4 | 6+2 |
| Number of synchronized gears (front+rear) | – | – | – |
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| Speed-Shift | – | – | – |
| Type of reverse | – | – | – |
| Driving speed (km/h) | 3,5-24,0 | 3,8-28,0 | – |
| Max Driving speed (km/h) | 27 | 27,4 | – |
| Hydraulic pump capacity (L/min) | 22,7 | 22,7 | 28 |
| 3-Point Hitch control | mech | mech | mech |
| 3-point hitch max load (kg) | 1000 | 1000 | 820 |
| PTO speed (rpm) | 540/1000 | 540/1000 | 540 |
| Disc brake type (dry / wet) | – | – | – |
| Type of control of the braking system | mech | mech | mech |
| Turning radius 2WD (m) | 4,8 | – | – |
| Turning radius 4WD (m) | – | – | – |
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| 5,50-16 | 6,00-16 | 6,00-16 | |
| Front wheel 4WD | – | – | – |
| Rear wheel 2WD | 11,2/10-28 | 12,4/11-28 | 12,4/11-32 |
| Rear wheel 4WD | – | – | – |
| 2WD total weight (kg) | 1580 | 1800 | 1920 |
| 4WD total weight (kg) | – | – | – |
| Total height with cabin (cm) | 130 | 138 | – |
| Total length (cm) | 290 | 310 | – |
| Total width (cm) | 191 | 191 | 192 |
| Fuel tank capacity (l) | – | – | – |
| Cabin sound level (dB) | – | – | – |
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