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Siirry sivupalkkiinSiirry alaosaanDavid Brown 770-1200










At the end of 1965, David Brown Implematics were replaced by white Selectamatics. The new series got its name from the upgraded hydraulics, which offered adjustment of working depth, position control, and use of external hydraulics with a single control lever. The smallest model in the lineup was the 36-horsepower 2.4-liter 770. Of the models imported to Finland, the 990’s 3.0-liter engine remained unchanged, but the 880’s displacement had increased to 2.7 liters. The SAE horsepower ratings in Finland were 48.5 and 58 hp. The power take-off also featured a 1000 rpm speed. The 990 had an 11-inch clutch instead of 10 inches. AS models featured a dual clutch allowing for a power take-off independent of the clutch and had 12+4 gears. The basic gearbox’s lowest speed was quite high. A problem with the lifting device was the small lifting range.
In spring 1967, the flagship of the lineup was introduced: the 67-horsepower (71 SAE) 1200 Selectamatic. The 3.6-liter four-cylinder engine had the same cylinder dimensions as the 3-cylinder 880. The transmission was more robust than that of the smaller models. The dual-clutch plates were 11 inches and power was controlled by a hand lever. Unlike the smaller models, the hydraulic pump was independent of the clutch. A dual pump was available for the hydraulics, increasing flow from 22.7 liters to 52 liters. The 1200’s power was increased by five horsepower the following year. Another new model in 1967 was the 780, in which the 2.7-liter engine from the 880 was installed in the lighter structure of the 770. The 780 was also not imported to Finland. In 1970, four-wheel-drive versions of the 990 and 1200 were introduced, but these were not imported to Finland either.
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| Model | David Brown 770 Selectamatic | David Brown 780 Selectamatic | David Brown 880 Selectamatic | David Brown 990 Selectamatic | David Brown 990 Selectamatic | David Brown 1200 Selectamatic | David Brown 1200 Selectamatic |
|---|---|---|---|---|---|---|---|
| Manufacturer name | David Brown | David Brown | David Brown | David Brown | David Brown | David Brown | David Brown |
| Imported to Finland | No | No | Yes | Yes | Yes | Yes | Yes |
| Years | 1965-70 | 1967-71 | 1965-71 | 1965-68 | 1968-71 | 1967-68 | 1968-71 |
| Engine model | DB AD3/49 | DB AD3/55 | DB AD3/55 | DB AD4/47 | DB AD4/49 | DB AD4/55 | DB AD4/55 |
| Cyl/Turbo/Intercooler | 3 | 3 | 3 | 4 | 4 | 4 | 4 |
| Displacement | 2400 cm³ | 2695 cm³ | 2695 cm³ | 3045 cm³ | 3195 cm³ | 3592 cm³ | 3592 cm³ |
| Bore x stroke | 100×101,6 mm | 100×114,3 mm | 100×114,3 mm | 92,1×114,3 mm | 100×101,6 mm | 100×114,3 mm | 100×114,3 mm |
| Rated power | 36/2000 hp DIN/rpm | 46/2200 hp DIN/rpm | 46/2200 hp DIN/rpm | 55/2200 hp DIN/rpm | 55/2200 hp DIN/rpm | 67/2300 hp DIN/rpm | 72/2300 hp DIN/rpm |
| Torque | - | - | - | - | - | - | - |
| Gears | 6+2/12+4 | 6+2/12+4 | 6+2/12+4 | 6+2/12+4 | 6+2/12+4 | 6+2/12+4 | 6+2/12+4 |
| Speeds in km/h | 3,2-24,8 | 3,2-26,2 | 4,3-29,2 | 3,3-26,0 | 3,3-28,0/ 1,6-31,0 | 4,0-23,7 | 4,0-23,7 |
| Hydr. flow l/min | 22.7 l/min | 22.7 l/min | 22.7 l/min | 22.7 l/min | 28 l/min | 22,7 (52) l/min | 26 (52) l/min |
| Hydraulic pressure | 140 bar | 140 bar | 140 bar | 140 bar | 140 bar | 140 bar | 140 bar |
| Lift controls | mech. | mech. | mech. | mech. | mech. | mech. | mech. |
| Lift capacity | 900 kg | 1200 kg | 1200 kg | 1500 kg | 1500 kg | 1940/2080 kg | 1940/2080 kg |
| PTO speeds | 540 | 540 | 540/1000 | 540/1000 | 540/1000 | 540/1000 | 540/1000 |
| Brakes | drum brakes | drum brakes | drum brakes | drum brakes | drum brakes | drum brakes | drum brakes |
| Steering | mech. | mech. | mech. | mech. | mech. | mech. | mech. |
| Turning circle m 2WD | 6.56 | 6.7 | 7 | 7.02 | 7.02 | 7.88 | 7.88 |
| Front tyres 2WD | 6.00-16 | 6.00-16 | 6.00-16 | 7.50-16 | 7.50-16 | 7.50-16 | 7.50-16 |
| Rear tyres 2WD | 12.4-28 | 12.4-28 | 12.4-32 | 12.4-36 | 12.4-36 | 13.6-36 | 12.4-38 |
| Weight 2WD | (1720) kg | (1690) kg | (1810)/2050 kg | (2080)/2225 kg | (2200)/2315 kg | (2610) kg | (2600)/2790 kg |
| Length (2WD/4WD) | 325 cm | 290 cm | 308 cm | 320 cm | 320 cm | 363 cm | 363/4v. 360 cm |
| Wheelbase (2WD/4WD) | 196 cm | 190.5 cm | 203 cm | 200 cm | 200/4v. 195 cm | 225 cm | 225/4v. 220 cm |
| Fuel tank | 36 l | 36 l | 52.3 l | 61.4 l | 61.4 l | 81.7 l | 81.7 l |
| Max. speed | - | 27.9 km/h | - | - | - | 27 km/h | 27 km/h |
| Height with cab | - | (142) cm | (150) cm | (163) cm | (163) cm | (164) cm | (164) cm |
| Front tyres 4WD | - | - | - | - | 9.5-24 | - | 11.2-24 |
| Rear tyres 4WD | - | - | - | - | 12.4-36 | - | 13.6-36 |
| Weight 4WD | - | - | - | - | 2630 kg | - | 3035 kg |
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