David Brown 990 Implematic

David Brown 990 Implematic Utility tractor Technical Specifications

David Brown 990 Implematic is a Row-Crop tractor that was produced by the John Deere between 1961 – 1980.

Below you will find detailed technical specifications for David Brown 990 Implematic covering engine types, horsepower ratings, weight, height, fuel type and tank volume, oil capacity and type, hydraulic system diagram, wiring diagram, battery specs, etc.

David Brown 990 Implematic Production

Manufacturer: David Brown
Type: Utility tractor
Factory: Meltham Mills, Huddersfield, England

David Brown 990 Implematic Electrical

Charging system: generator
Batteries: 2
Battery volts: 6

David Brown 990 Implematic Mechanical

Chassis: 4×2 2WD
Differential lock: mechanical rear
Steering: manual
  hydrostatic power (optional)
Brakes: differential mechanical expanding shoe
Cab: Open operator station.
Transmissions: 6-speed gear
  12-speed partially synchronized


Type: open center
Pressure: 2000 psi
137.9 bar
Total flow: 7.4 gpm
28.0 lpm

Tracktor Hitch

Rear Type: II/I

Power Take-off (PTO)

Rear PTO: transmission
  live (optional)
Clutch: dry disc
Rear RPM: 540/1000 (1.375)
Engine RPM: 540@1800 (Low)
540@1100 (High)

David Brown 990 Implematic Engine detail

Engine Detail
David Brown
Displacement: 185.8 ci
3.0 L
Bore/Stroke: 3.625×4.50 inches
92 x 114 mm
Power: 52 hp
38.8 kW
Air cleaner: oil bath
Compression: 17:1
Rated RPM: 2200
Operating RPM: 700-2200
Starter volts: 12
Oil capacity: 7.8 qts
7.4 L
Coolant capacity: 14.4 qts
13.6 L

David Brown 990 Implematic Transmission overview

Engine Oil

Type: gear
Gears: 6 forward and 2 reverse
Clutch: 279mm dry disc
Three gears (1-3) plus reverse (R) in low and high ranges.

David Brown 990 Implematic Dimensions

Wheelbase: 76.75 inches
194 cm
Length: 118 inches
299 cm
Width: 67 inches
170 cm
Height (hood): 56 inches
142 cm
Clearance (front axle): 20 inches
50 cm
Front tread: 52/56/60/64/68/72/76 inches
132/142/152/162/172/182/193 cm
Rear tread: 52/56/60/64/68/72/76 inches
132/142/152/162/172/182/193 cm

David Brown 990 Weight
Operating: 4272 lbs
1937 kg
  4312 lbs
1955 kg (live PTO)
Ballasted: 5880 lbs
2667 kg

David Brown 990 Implematic Tests

Nebraska Tractor Test 903

Nebraska Tractor Test 903
3L diesel 6-speed 2WD
June 11 – 19, 1965
Link: Nebraska Tractor Test 903 file
PTO performance
Power at rated engine speed: 51.60 hp
38.5 kW
Fuel use: 3.4 gal/hour
12.9 l/hour
Power at rated PTO speed: 48.49 hp
36.2 kW
Fuel use: 3.0 gal/hour
11.4 l/hour
Drawbar performance
Max power: 43.47 hp
32.4 kW
Fuel use: 3.4 gal/hour
12.9 l/hour
Gear 3 used for power test.
Max pull: 6,039 lbs
2739 kg
Gear 1 used for pull test.


Is David Brown 990 Implematic a good tractor?

The David Brown 990 Implematic is one of the great tractors in the David Brown stable, and it has earned David Brown a fantastic reputation.

How much oil does a David Brown 990 Implematic take?

Check out the David Brown 990 Implematic oil capacity and oil type in the engine specs section as it may vary across the engines. Keep in mind, that older models might have their oil capacity increased over time. You may compare between the early and late oil capacity.

Do tractors have VIN numbers?

Every tractor has a VIN number. The number is usually engraved below the driver’s seat. Tractor manufacturers put the number in different places on the tractor body.

What was the last year David Brown made the ?

The David Brown 990 Implematic was an agricultural tractor model made from 1961 – 1980

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