David Brown 900 row-crop tractor: review and specs

The David Brown 900 is a 2WD row-crop tractor manufactured by David Brown from 1956 to 1958.

The David Brown 900 is equipped with one of two engines: a 2.7 L (165.0 cu·in) four-cylinder diesel engine, a 2.7 L (165.0 cu·in) four-cylinder kerosene engine, or a 2.7 L (165.0 cu·in) four-cylinder gasoline engine and a gear type transmission with 6 forward and 2 reverse gears.

The tractor could be equipped with the following engines:

David Brown AD4/30H. It is a 2.7 L, 2,704 cm², (165.0 cu·in) four-cylinder natural aspirated diesel engine with 92.0 mm (3.62 in) of the cylinder bore and 102.0 mm (4.02 in) of the piston stroke. The compression ratio rating is 15.9:1. This engine produced 40.5 PS (29.8 kW; 40.0 HP) at 2,200 rpm of output power and 142.4 N·m (14.5 kg·m, 104.9 ft·lb) at 1,300 rpm.
David Brown AK4/30H. It is a 2.7 L, 2,704 cm², (165.0 cu·in) four-cylinder natural aspirated kerosene engine. The cylinder bore is 92.0 mm (3.62 in) and the piston stroke is 102.0 mm (4.02 in). The compression ratio rating is 4.7:1. This engine produced 38.1 PS (28.0 KW; 37.5 HP) at 2,200 rpm of output power and 149.2 Nm (15.22 kg·m; 110.11 ft·lb) at 1,300 rpm.
David Brown AG4/30H. It is a 2.7 L, 2,704 cm², (165.0 cu·in) four-cylinder natural aspirated gasoline engine. The cylinder bore is 92.0 mm (3.62 in) and the piston stroke is 102.0 mm (4.02 in). The compression ratio rating is 5.5:1. This engine produced 41.1 PS (30.2 kW; 40.5 HP) at 2,200 rpm of output power and .
David Brown PAG4/30H. It is a 2.7 L, 2,704 cm², (165.0 cu·in) four-cylinder natural aspirated high-compression gasoline engine for premium fuel. The cylinder bore is 92.0 mm (3.62 in) and the piston stroke is 102.0 mm (4.02 in). The compression ratio rating is 7.0:1. This engine produced 46.1 PS (33.9 KW; 45.5 HP) at 2,200 rpm of output power and .

The David Brown 900 is equipped with manual steering, mechanical drum brakes, open operator station and 43.5 liters (11.5 US gal.; 9.6 Imp. gal) fuel tank.

David Brown 900 Specifications

General Specifications
Model	David Brown 900
Length	2,870 mm (113 in)
Width	1,650 mm (65 in)
Height	1,970 mm (77.6 in)
Wheel base	1,820 mm (71.7 in)
Ground clearance (front axle)	400 mm (15.7 in)
Weight	Diesel: 1,815 kg (4,001 lbs) Kerosene: 1,770 kg (3,902 lbs)
Fuel tank capacity	43.5 liters (11.5 US gal.; 9.6 Imp. gal)
Battery
Cabin type	Open operator station
Engine
Engine model	David Brown AD4/30H
Engine type	Four-stroke, liquid-cooled, inline
Cylinders	4
Fuel type	Diesel
Displacement	2.7 L, 2,704 cm², (165.0 cu·in)
Bore and stroke	92.0 mm X 102.0 mm (3.62 in X 4.02 in)
Compression ratio	15.9:1
Horsepower	40.5 PS (29.8 kW; 40 HP) at 2,200 rpm
Torque	142.4 N·m (14.5 kg·m, 104.9 ft·lb) at 1,300 rpm
Starter	Electric
Oil capacity:	6.6 L (7 US. qt, 5.8 Imp. qt.)
Coolant capacity:	13.2 L (13.9 US. qt, 11.6 Imp. qt.)
Engine
Engine model	David Brown AK4/30H
Engine type	Four-stroke, liquid-cooled, inline
Cylinders	4
Fuel type	Kerosene
Displacement	2.7 L, 2,704 cm², (165.0 cu·in)
Bore and stroke	92.0 mm X 102.0 mm (3.62 in X 4.02 in)
Compression ratio	4.7:1
Horsepower	38.1 PS (28.0 KW; 37.5 HP) at 2,200 rpm
Torque	149.2 Nm (15.22 kg·m; 110.11 ft·lb) at 1,300 rpm
Starter	Electric
Oil capacity:	6.6 L (7 US. qt, 5.8 Imp. qt.)
Coolant capacity:	13.2 L (13.9 US. qt, 11.6 Imp. qt.)
Engine
Engine model	David Brown AG4/30H
Engine type	Four-stroke, liquid-cooled, inline
Cylinders	4
Fuel type	Gasoline
Displacement	2.7 L, 2,704 cm², (165.0 cu·in)
Bore and stroke	92.0 mm X 102.0 mm (3.62 in X 4.02 in)
Compression ratio	5.5:1
Horsepower	41.1 PS (30.2 kW; 40.5 HP) at 2,200 rpm
Starter	Electric
Oil capacity:	6.6 L (7 US. qt, 5.8 Imp. qt.)
Coolant capacity:	13.2 L (13.9 US. qt, 11.6 Imp. qt.)
Engine
Engine model	David Brown PAG4/30H
Engine type	Four-stroke, liquid-cooled, inline
Cylinders	4
Fuel type	Gasoline
Displacement	2.7 L, 2,704 cm², (165.0 cu·in)
Bore and stroke	92.0 mm X 102.0 mm (3.62 in X 4.02 in)
Compression ratio	7.0:1
Horsepower	46.1 PS (33.9 KW; 45.5 HP) at 2,200 rpm
Starter	Electric
Oil capacity:	6.6 L (7 US. qt, 5.8 Imp. qt.)
Coolant capacity:	13.2 L (13.9 US. qt, 11.6 Imp. qt.)

Transmission and chassis
Chassis	4×2 2WD
Steering type	Manual
Brakes	Mechanical drum
Transmission model	David Brown
Transmission type	Gear type
Gears	6 forward and 2 reverse
Speed	Forward: 24.5 kmh (15.2 mph) Reverse: 10.7 kmh (6.7 mph)
Tires
Front tires	Ag: 6.00×16
Rear tires	Ag: 11.25×28

Three-Point Hitch
Category	I
Control type	–
Lift capacity (at ends)	816 kg (1,800 lbs)
PTO (Power take-off shaft)
Rear PTO type	Transmission or live (optional)
Rear PTO speed	540 rpm

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