David Brown 4600 Selectamatic

The David Brown 4600 Selectamatic is a tractor produced by David Brown. It is equipped with a 164.4 ci 2.7 L engine. The listed engine power is 46.05 hp 34.3 kW. Transmission: 12 forward and 4 reverse. Operating weight: 4300 lbs 1950 kg.

Engine Power

46.05 hp 34.3 kW

Fuel & Capacities

13.75 gal 52.0 L

Transmission

12 forward and 4 reverse

Operating Weight

4300 lbs 1950 kg

Overview

	1968 - 1971 Utility tractor

Production
Manufacturer	David Brown
Utility tractor
Built in Meltham Mills, Huddersfield, England
Original price	$4,600 (1971)

David Brown 4600 Engine
David Brown 2.7L 3-cyl gasoline
Engine details ...

David Brown 4600 Power
PTO (claimed)	46 hp 34.3 kW
Drawbar (tested)	38.34 hp 28.6 kW
PTO (tested)	46.05 hp 34.3 kW
Performance test details ...

Mechanical
Two-wheel drive
Final drives	spur gear
Differential lock	rear diff lock standard
Steering	manual
	power-assist optional
Expanding shoe brakes
Open operator station.

Capacity
Fuel	13.75 gal 52.0 L
Hydraulic system	6 gal 22.7 L

Hydraulics
Type	Selectamatic
Capacity	6 gal 22.7 L
Pressure	2000 psi 137.9 bar
Valves	0 to 2
Pump flow	7.3 gpm 27.6 lpm

Tractor hitch
Rear Type	II/I
Control	position and draft control
Rear lift (at ends)	1800 lbs (working) 816 kg
	2500 lbs (static) 1134 kg

Power Take-off (PTO)
Rear PTO	live
Rear PTO Type	540/1000
Engine RPM	540@1823
	1000@2000

Dimensions & Tires
Wheelbase	79.75 inches 202 cm
Weight	4300 lbs 1950 kg
Front tire	6.00-16
Rear tire	14.9/13-28
Full dimensions and tires ...

References

4600 Gasoline published by David Brown

Engine

Engine Detail — 164.4 ci / 2.7 L Gasoline

Manufacturer	David Brown
Fuel Type	Gasoline
Configuration	3-cylinder, liquid-cooled
Displacement	164.4 ci 2.7 L
Bore/Stroke	3.939x4.500 inches 100 x 114 mm
Air cleaner	oil bath
Compression	7.5:1
Rated RPM	2200
Operating RPM	700-2200
Torque	140 lb-ft 189.8 Nm
Torque RPM	1400
Starter volts	12
Oil capacity	6.75 qts 6.4 L
Coolant capacity	11 qts 10.4 L

Transmission

Transmission options
6-speed gear
12-speed gear

Transmission — 6 forward and 2 reverse gear

Type	gear
Gears	6 forward and 2 reverse
Clutch	dry disc
Oil capacity	24 qts 22.7 L

Transmission — 12 forward and 4 reverse gear

Type	gear
Gears	12 forward and 4 reverse
Clutch	dry disc
Oil capacity	24 qts 22.7 L

Dimensions

David Brown 4600 Tires
Ag front	6.00-16
Ag rear	14.9/13-28
Ag front	7.50-16

Dimensions
Wheelbase	79.75 inches 202 cm
Length	121.5 inches 308 cm
Width	68.375 inches (min) 173 cm
Height (hood)	54 inches 137 cm
Operating weight	4300 lbs 1950 kg
Ballasted weight	6750 lbs 3061 kg
Clearance (front axle)	19.75 inches 50 cm
Clearance (drawbar)	14.25 inches 36 cm
Front tread	52 to 72 inches 132 to 182 cm
Rear tread	52 to 80 inches 132 to 203 cm
Rear tread	60 to 80 inches 152 to 203 cm (PAVT)

Tests

Nebraska Tractor Test 1019
Gasoline 6-speed 2WD September 2 - 11, 1969 Link: Nebraska Tractor Test 1019 file
PTO performance
Power at rated engine speed	46.05 hp 34.3 kW
Fuel use	4.0 gal/hour 15.1 l/hour
Power at rated PTO speed	43.17 hp 32.2 kW
Fuel use	3.7 gal/hour 14.0 l/hour
Drawbar performance
Max power	38.34 hp 28.6 kW
Fuel use	4.0 gal/hour 15.1 l/hour
Gear 3 used for power test.
Max pull	5421 lbs 2458 kg
Gear 1 used for pull test.

Photos

David Brown 4600 Selectamatic

Recommended Implements & Sizing Guide

Engineering recommendations for David Brown 4600 Selectamatic based on its 46.05 HP power envelope and ASAE agricultural standards.

Implement & Operation	Recommended Size	Workload Rating	Engineering Notes
Moldboard PlowPrimary Tillage	2 to 3 Bottom (14-16")2 - 3 铧 (35-40 cm)	Medium Duty	Standard utility farm tillage.
Rotary Cutter / MowerMowing & Clearing	6 ft (72 in)1.8 m	Medium Duty	Medium pasture clearing; rear slip-clutch recommended.
Rotary TillerSeedbed Prep	66 to 72 in165 - 180 cm	Medium Duty	Standard utility tiller; slip clutch protection required.
Disc HarrowSecondary Tillage	7 to 8 ft Tandem Disc2.1 - 2.4 m 对开双排耙	Medium Duty	Field leveling and clod breaking behind plows.
Hay BalerHay & Forage	Small Square Baler (14x18")小方捆打捆机 (36x46 cm)	Medium Duty	Classic 2-string baler for horse and small livestock hay.

Sizing & Soil Condition NoteActual implement sizing varies depending on local soil conditions (heavy clay vs sandy loam), field slope, and operating speed. Heavy tillage implements may require front ballast weights and wheel weights.

Fluids, Capacities & Working Autonomy

Standard fluid requirements, service intervals, and continuous runtime estimates for David Brown 4600 Selectamatic.

Estimated Continuous Field Runtime: 5.8 hrs

Approximately 5.8 hours of continuous field operation at ~75% rated power on a full tank (13.8 gal / 52 L).

Estimated 75% Load Fuel Burn~2.4 gal/hr (9.1 L/hr)

Engine Crankcase Oil

SAE 15W-40 (Heavy Duty Diesel)

Standard Spec: API CK-4 / CJ-4 Heavy Duty

Service Interval: 150 – 250 Hours

Transmission & Hydraulic System

UTTO (Universal Tractor Transmission Oil)

Standard Spec: ISO VG 46 / 68 (Wet Brake & Trans Compatible)

Service Interval: 600 – 1000 Hours

Engine Cooling System

50/50 Ethylene Glycol Pre-mix

Standard Spec: ASTM D6210 / Heavy-Duty OAT Antifreeze

Service Interval: 2 Years / 1500 Hours