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
Model David Brown 990 Selectamatic
Length 2WD: 3,200 mm (126 in)
4WD: 3,220 mm (126.8 in)
Width 1,620 mm (63.8 in)
Height
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 capacity 60.9 liters (16.1 US gal.; 13.4 Imp. gal)
Battery 12V, 96Ah
Cabin type Open operator station
Engine
Engine model David Brown
Engine type Four-stroke, liquid-cooled, inline
Cylinders 4
Fuel type Diesel
Displacement 3.2 L, 3,195 cm2, (195.0 cu·in)
Bore and stroke 100.0 mm X 102.0 mm (3.94 in X 4.02 in)
Compression ratio 17.0:1
Horsepower 55.8 PS (41.0 kW; 55.0 HP) at 2,200 rpm
Torque 189.8 N·m (19.4 kg·m, 139.9 ft·lb) at 1,400 rpm
Starter Electric
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
Chassis 4×2 2WD or 4×4 MFWD 4WD
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: 22.7 kmh (14.1 mph) Reverse: 12.3 kmh (7.6 mph)
Transmission model
Transmission type Partially synchronized with dry disc clutch
Gears 12 forward and 4 reverse
Transmission oil capacity 23.0 L (6.1 US. gal, 5.1 Imp. gal.)
Tires
Front tires Ag: 6.00-19 (2WD), 9.5-24 (4WD)
Rear tires Ag: 12.4-36
Three-Point Hitch
Category II/I
Control type Position control
Lift capacity (at ends) 907 kg (2,000 lbs)
PTO (Power take-off shaft)
Rear PTO type Transmission or live (option)
Rear PTO speed 540/1000 rpm
Hydraulic system
Hydraulic type Open center
Pressure 2000 psi (137.9 bar)
Pump flow 7.2 gpm (27.3 lpm)