David Brown 990 Selectamatic (1965-1970)

David Brown 990 SelectamaticThe David Brown 990 Selectamatic is a 2WD or 4WD utility tractor from the Selectamatic series. The first generation was manufactured by David Brown in Meltham Mills, Huddersfield, England from 1965 to 1970. The David Brown 990 Selectamatic is equipped with a 3.2 L (195.0 cu·in) four-cylinder diesel engine and one of two transmissions: a gear type transmission with 6 forward and 2 reverse gears and with dry disc clutch or a partially synchronized with dry disc clutch transmission with 12 forward and 4 reverse gears.

The David Brown 990 Selectamatic utility tractor used the David Brown engine. It is a 3.2 L, 3,195 cm2, (195.0 cu·in) four-cylinder natural aspirated diesel engine with 100.0 mm (3.94 in) of the cylinder bore and 102.0 mm (4.02 in) of the piston stroke. The compression ratio rating is 17.0:1. This engine produced 55.8 PS (41.0 kW; 55.0 HP) at 2,200 rpm of output power and 189.8 N·m (19.4 kg·m, 139.9 ft·lb) at 1,400 rpm of torque.

The David Brown 990 Selectamatic is equipped with manual or hydrostatic power (optional) steering, differential mechanical expanding shoe brakes, open operator station, and 60.9 liters (16.1 US gal.; 13.4 Imp. gal) fuel tank.

David Brown 990 Selectamatic Specifications

General Specifications
ModelDavid Brown 990 Selectamatic
Length 2WD: 3,200 mm (126 in)
4WD: 3,220 mm (126.8 in)
Width1,620 mm (63.8 in)
Wheel base 2WD: 2,000 mm (78.7 in)
4WD: 1,950 mm (76.8 in)
Ground clearance (front axle) 2WD: 540 mm (21.3 in)
4WD: 330 mm (13 in)
Weight 2WD: 2,315 kg (5,104 lbs)
4WD: 2,630 kg (5,798 lbs)
Fuel tank capacity60.9 liters (16.1 US gal.; 13.4 Imp. gal)
Battery12V, 96Ah
Cabin typeOpen operator station
Engine modelDavid Brown
Engine typeFour-stroke, liquid-cooled, inline
Fuel typeDiesel
Displacement3.2 L, 3,195 cm2, (195.0 cu·in)
Bore and stroke100.0 mm X 102.0 mm (3.94 in X 4.02 in)
Compression ratio17.0:1
Horsepower55.8 PS (41.0 kW; 55.0 HP) at 2,200 rpm
Torque189.8 N·m (19.4 kg·m, 139.9 ft·lb) at 1,400 rpm
Oil capacity:7.5 L (7.9 US. qt, 6.6 Imp. qt.)
Coolant capacity:14.0 L (14.8 US. qt, 12.3 Imp. qt.)
Transmission and chassis
Chassis4×2 2WD or 4×4 MFWD 4WD
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: 22.7 kmh (14.1 mph) Reverse: 12.3 kmh (7.6 mph)
Transmission model
Transmission typePartially synchronized with dry disc clutch
Gears12 forward and 4 reverse
Transmission oil capacity23.0 L (6.1 US. gal, 5.1 Imp. gal.)
Front tires Ag: 6.00-19 (2WD), 9.5-24 (4WD)
Rear tires Ag: 12.4-36
Three-Point Hitch
Control typePosition control
Lift capacity (at ends)907 kg (2,000 lbs)
PTO (Power take-off shaft)
Rear PTO typeTransmission or live (option)
Rear PTO speed540/1000 rpm
Hydraulic system
Hydraulic typeOpen center
Pressure2000 psi (137.9 bar)
Pump flow7.2 gpm (27.3 lpm)
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