David Brown 25

The David Brown 25 is a tractor produced by David Brown. It is equipped with a 154 ci 2.5 L engine. The rated power output is 32 hp 23.9 kW. Transmission: 6 forward and 2 reverse. Operating weight: 3,715 lbs 1685 kg.

Overview

	1953 - 1958	1953 - 1958

Production
Manufacturer	David Brown

Variants
25D	diesel engine
25C	petrol engine

David Brown 25 Transmission
6-speed gear
Transmission details ...

David Brown 25 Power
Engine	32 hp 23.9 kW
Gas Drawbar (claimed)	24.1 hp 18.0 kW
Kerosene Drawbar (claimed)	22.7 hp 16.9 kW
Drawbar (tested)	25.88 hp 19.3 kW
Belt (tested)	34.89 hp 26.0 kW
Performance test details ...

Mechanical
Two-wheel drive
Steering	manual
Mechanical shoe brakes
Open operator station.

Hydraulics
Total flow	9.5 gpm 36.0 lpm

Tractor hitch
Rear lift	1,300 lbs 589 kg

Power Take-off (PTO)
Rear PTO Type	540

Dimensions & Tires
Wheelbase	74.8 inches 189 cm
Weight	3,715 lbs 1685 kg
Front tire	6.00-19
Rear tire	11-28
Full dimensions and tires ...

Electrical
Charging system	generator

References
Field Force published in 1953, by David Brown
25D published in 1954, by David Brown
25D Diesel published in 1957, by David Brown

Engine

Engine options
David Brown 2.5L 4-cyl diesel
David Brown 2.5L 4-cyl gasoline
David Brown 2.5L 4-cyl kerosene

Engine Detail — 154 ci / 2.5 L Diesel

Manufacturer	David Brown
Fuel Type	Diesel
Configuration	4-cylinder, liquid-cooled
Displacement	154 ci 2.5 L
Bore/Stroke	3.50x4.00 inches 89 x 102 mm
Power	32 hp 23.9 kW
Compression	15.9:1
Rated RPM	1800
Starter volts	12

Engine Detail — 154 ci / 2.5 L Gasoline

Manufacturer	David Brown
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled
Displacement	154 ci 2.5 L
Bore/Stroke	3.50x4.00 inches 89 x 102 mm
Air cleaner	oil bath
Compression	5.5:1
Rated RPM	1600
Starter volts	12

Engine Detail — 154 ci / 2.5 L Kerosene

Manufacturer	David Brown
Fuel Type	Kerosene
Configuration	4-cylinder, liquid-cooled
Displacement	154 ci 2.5 L
Bore/Stroke	3.50x4.00 inches 89 x 102 mm
Compression	4.7:1
Rated RPM	1600

Transmission

Transmission — 6 forward and 2 reverse gear

Type	gear
Gears	6 forward and 2 reverse
Clutch	dry plate

Dimensions

David Brown 25 Tires
Ag front	6.00-19
Ag rear	11-28

Dimensions
Wheelbase	74.8 inches 189 cm
Length	113 inches 287 cm
Weight	3,715 lbs 1685 kg
Ground clearance	15.4 inches 39 cm
Front tread	49.5 to 62 inches 125 to 157 cm
Rear tread	48 to 68 inches 121 to 172 cm

Tests

Nebraska Tractor Test 530
Gasoline 6-speed 2WD November 1 - 6, 1954 Link: Nebraska Tractor Test 530 file
Belt power (max)	34.89 hp 26.0 kW
Belt fuel use (max)	3.3 gal/hour 12.5 l/hour
Drawbar performance
Max power	25.88 hp 19.3 kW
Gear 4 used for power test.
Max pull	3,269 lbs 1482 kg
Gear 2 used for pull test.

Photos

David Brown 25C

David Brown 25C

David Brown 25C

David Brown 25D with factory cab.

David Brown 25D with factory cab.