David Brown 990 Implematic

The David Brown 990 Implematic is a 2WD utility tractor manufactured by David Brown in Meltham Mills, Huddersfield, England from 1961 to 1965. The David Brown 990 Implematic is equipped with a 3.0 L (185.8 cu·in) four-cylinder diesel engine and one of two transmissions: a gear type transmission with 6 forward and 2 reverse gears and dry disc clutch or a partially synchronized transmission with 12 forward and 4 reverse gears.

The DB 990 Implematic utility tractor used the David Brown engine. It is a 3.0 L, 3,044 cm2, (185.8 cu·in) four-cylinder natural aspirated diesel engine with 92.0 mm (3.62 in) of the cylinder bore and 114.0 mm (4.49 in) of the piston stroke. The compression ratio rating is 17.0:1. This engine produced 52.8 PS (38.8 kW; 52.0 HP) at 2,200 rpm of output power.

The David Brown 990 Implematic is equipped with manual or hydrostatic power (optional) steering, differential mechanical expanding shoe brakes, open operator station, and 52.0 liters (13.7 US gal.; 11.4 Imp. gal) fuel tank.

David Brown 990 Implematic Specifications

General Specifications
Model David Brown 990 Implematic
Length 2,990 mm (117.7 in)
Width 1,700 mm (66.9 in)
Height (hood) 1,420 mm (55.9 in)
Wheel base 1,940 mm (76.4 in)
Ground clearance (front axle) 500 mm (19.7 in)
Weight (operating) 1,940 kg (4,277 lbs)
Fuel tank capacity 52.0 liters (13.7 US gal.; 11.4 Imp. gal)
Battery Two 6V
Cabin type Open operator station
Engine model David Brown
Engine type Four-stroke, liquid-cooled, inline
Cylinders 4
Fuel type Diesel
Displacement 3.0 L, 3,044 cm2, (185.8 cu·in)
Bore and stroke 92.0 mm X 114.0 mm (3.62 in X 4.49 in)
Compression ratio 17.0:1
Horsepower 52.8 PS (38.8 kW; 52.0 HP) at 2,200 rpm
Starter Electric
Oil capacity: 7.4 L (7.8 US. qt, 6.5 Imp. qt.)
Coolant capacity: 13.6 L (14.4 US. qt, 12 Imp. qt.)
Transmission and chassis
Chassis 4×2 2WD
Steering type Manual or hydrostatic power (optional)
Brakes Differential mechanical expanding shoe
Differential lock Mechanical rear
Transmission model
Transmission type Gear type with dry disc clutch
Gears 6 forward and 2 reverse
Speed Forward: 19.1 kmh (11.9 mph) Reverse: 10.4 kmh (6.5 mph)
Transmission model
Transmission type Partially synchronized
Gears 12 forward and 4 reverse
Front tires Ag: 6.00-16
Rear tires Ag: 11-32
Three-Point Hitch
Category II/I
Control type
Lift capacity (at ends)
PTO (Power take-off shaft)
Rear PTO type Transmission or live (optional)
Rear PTO speed 540/1000 rpm
Hydraulic system
Hydraulic type Open center
Pressure 2000 psi (137.9 bar)
Total flow 7.4 gpm (28 lpm)
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