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
ModelDavid Brown 990 Implematic
Length2,990 mm (117.7 in)
Width1,700 mm (66.9 in)
Height (hood)1,420 mm (55.9 in)
Wheel base1,940 mm (76.4 in)
Ground clearance (front axle)500 mm (19.7 in)
Weight (operating)1,940 kg (4,277 lbs)
Fuel tank capacity52.0 liters (13.7 US gal.; 11.4 Imp. gal)
BatteryTwo 6V
Cabin typeOpen operator station
Engine modelDavid Brown
Engine typeFour-stroke, liquid-cooled, inline
Fuel typeDiesel
Displacement3.0 L, 3,044 cm2, (185.8 cu·in)
Bore and stroke92.0 mm X 114.0 mm (3.62 in X 4.49 in)
Compression ratio17.0:1
Horsepower52.8 PS (38.8 kW; 52.0 HP) at 2,200 rpm
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
Chassis4×2 2WD
Steering typeManual or hydrostatic power (optional)
BrakesDifferential mechanical expanding shoe
Differential lockMechanical rear
Transmission model
Transmission typeGear type with dry disc clutch
Gears6 forward and 2 reverse
Speed Forward: 19.1 kmh (11.9 mph) Reverse: 10.4 kmh (6.5 mph)
Transmission model
Transmission typePartially synchronized
Gears12 forward and 4 reverse
Front tires Ag: 6.00-16
Rear tires Ag: 11-32
Three-Point Hitch
Control type
Lift capacity (at ends)
PTO (Power take-off shaft)
Rear PTO typeTransmission or live (optional)
Rear PTO speed540/1000 rpm
Hydraulic system
Hydraulic typeOpen center
Pressure2000 psi (137.9 bar)
Total flow7.4 gpm (28 lpm)
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