David Brown 900 Specs ( 1956-1958 )
Overview
The David Brown 900 is a row-crop tractor produced from 1956 to 1958, featuring a 2.7L four-cylinder engine available in diesel, kerosene, and gasoline configurations. The machine is built on a 72-inch wheelbase and weighs approximately 3,900 to 4,000 pounds, depending on the fuel system installed. It is equipped with a six-speed transmission and a Category I rear hitch with a lift capacity of 1,800 pounds.
Ideal Applications
Engine Variation and Output:
The 900 model provides four distinct engine options ranging from 37.5 to 45.5 horsepower, including a high-compression gasoline variant and a kerosene model rated at 32 claimed belt horsepower.
Transmission and PTO Layout:
This tractor utilizes a David Brown transmission with six forward and two reverse gears across high and low ranges, supporting a transmission-type rear PTO rated for 540 RPM at 1600 engine RPM.
Chassis and Tread Adjustability:
Equipped with manual steering and mechanical drum brakes, the chassis offers adjustable front and rear tread widths ranging from 52 to 86 inches to accommodate various row-crop requirements.
Production
| Description | Row-Crop tractor |
|---|---|
| Manufacturer | David Brown |
Engine
| Aux. fuel | 1.5 gal (5.7 L) |
|---|---|
| Engine type | David Brown 2.7L 4-cyl diesel / David Brown 2.7L 4-cyl kerosene / David Brown 2.7L 4-cyl gasoline |
| Fuel tank | 11.5 gal (diesel/gas) (43.5 L) |
| Bore/Stroke | 3.625x4.00 inches (92 x 102 mm) / 3.625x4.00 inches (92 x 102 mm) / 3.625x4.00 inches (92 x 102 mm) / 3.625x4.00 inches (92 x 102 mm) |
| Compression | 15.9:1 / 4.7:1 / 5.5:1 / 7:1 |
| Coolant capacity | 14 qts (13.2 L) / 14 qts (13.2 L) / 14 qts (13.2 L) |
| Description | David Brown AD4/30H / diesel / 4-cylinder / liquid-cooled / David Brown AK4/30H / kerosene / 4-cylinder / liquid-cooled / David Brown AG4/30H / gasoline / 4-cylinder / liquid-cooled / David Brown PAG4/30H / gasoline / 4-cylinder / liquid-cooled / High-compression gasoline engine for premium fuel. |
| Displacement | 165 ci (2.7 L) / 165 ci (2.7 L) / 165 ci (2.7 L) / 165 ci (2.7 L) |
| Exhaust valve clearance | 0.015 inches (hot) (0.381 mm) / 0.022 inches (hot) (0.559 mm) / 0.022 inches (hot) (0.559 mm) / 0.022 inches (hot) (0.559 mm) |
| Firing order | 1-2-4-3 / 1-2-4-3 / 1-2-4-3 / 1-2-4-3 |
| Fuel system | Slex 30FV carburetor / Solex 30FV carburetor / Solex 30FV carburetor |
| Intake valve clearance | 0.015 inches (hot) (0.381 mm) / 0.015 inches (hot) (0.381 mm) / 0.015 inches (hot) (0.381 mm) / 0.015 inches (hot) (0.381 mm) |
| Oil capacity | 7 qts (6.6 L) / 7 qts (6.6 L) / 7 qts (6.6 L) / 7 qts (6.6 L) |
| Power | 40 hp (29.8 kW) / 37.5 hp (28.0 kW) / 40.5 hp (30.2 kW) / 45.5 hp (33.9 kW) |
| Rated RPM | 2200 / 2200 / 2200 / 2200 |
| Starter | electric / electric / electric |
| Starter type | electric |
| Starter volts | 12 / 12 / 12 |
| Torque | 105 lb-ft (142.4 Nm) / 110 lb-ft (149.2 Nm) |
| Torque RPM | 1300 / 1000 |
| Engine type | David Brown 2.7L 4-cyl diesel / David Brown 2.7L 4-cyl kerosene / David Brown 2.7L 4-cyl gasoline |
| Belt (claimed) | 32 hp (kerosene) (23.9 kW) |
Transmission
| Clutch | 254mm dry disc |
|---|---|
| Description | Three gears (1-3) plus reverse (R) in two ranges (low/high). |
| Gears | 6 forward and 2 reverse |
| Oil capacity | 16 qts (15.1 L) |
| Transmission | David Brown |
| Transmission type | 6-speed |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Mechanical drum brakes |
| Drive type | Two-wheel drive |
| Steering | manual |
Hitch
| Rear lift (at ends) | 1800 lbs (816 kg) |
|---|---|
| Rear Type | I |
PTO
| Engine RPM | 545@1600 |
|---|---|
| Rear PTO | transmission |
| Rear PTO Type | 540 |
Dimensions & Tires
| Ag front | 6.00x16 |
|---|---|
| Ag rear | 11.25x28 / 5.50x16 |
| Standard tires (ag) | Front: 11.00x28. Rear: |
| Clearance (front axle) | 16 inches (40 cm) |
| Diesel Weight | 4000 lbs (1814 kg) |
| Front tread | 52/56/60/64/68/72/86 inches (132/142/152/162/172/182/218 cm) |
| Height | 77.75 inches (197 cm) |
| Height (hood) | 54.5 inches (138 cm) |
| Kerosene Weight | 3900 lbs (1769 kg) |
| Length | 113 inches (287 cm) |
| Rear tread | 52/56/60/64/68/72/86 inches (132/142/152/162/172/182/218 cm) |
| Wheelbase | 72 inches (182 cm) |
| Width | 65 inches (165 cm) |
| Front tire | 11.00x28 |
| Weight | 3900 to 4000 pounds |
| Wheelbase | 72 inches (182 cm) |
Belt Pulley
| Diameter | 8.5 inches (21 cm) |
|---|---|
| RPM | 1405 |
| Speed | 3125 ft/min (952.50 meters/min) |
| Width | 5.75 inches (14 cm) |
References
| Description | 900 - Superior Performance published in 1957, by David Brown / 900 published in 1958, by David Brown |
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