Allis Chalmers D12

The Allis Chalmers D12 is a tractor produced by Allis Chalmers. It is equipped with a 149 ci 2.4 L engine. The rated power output is 31 hp 23.1 kW. Transmission: 4 forward and 1 reverse. Operating weight: 2,800 lbs 1270 kg.

Overview

	1959 - 1968 D SeriesRow-Crop tractor
1959 - 1968
D Series
Row-Crop tractor

Production
Manufacturer	Allis Chalmers
Row-Crop tractor
Built in West Allis, Wisconsin, USA
Original price	$3,522 (1968)

Variants
D12 High Clearance	cultivation tractor
D10	single-row tractor

Allis Chalmers D12 Transmission
4-speed sliding gear
Transmission details ...

Allis Chalmers D12 Power
Engine	31 hp 23.1 kW
Drawbar (claimed)	25.75 hp 19.2 kW
PTO (claimed)	30 hp 22.4 kW
Drawbar (tested)	29.43 hp 21.9 kW
PTO (tested)	33.32 hp 24.8 kW
Performance test details ...

Mechanical
Two-wheel drive
Open operator station.

Hydraulics
Type	live
Valves	1 or 2

Tractor hitch
Rear Type	I
Type	Snap-Couple

Power Take-off (PTO)
Rear PTO Type	540

Dimensions & Tires
Wheelbase	78.75 inches 200 cm
Weight	2,800 lbs 1270 kg
Front tire	5.00x15
Rear tire	10x24
Full dimensions and tires ...

Belt Pulley
RPM	1220
Speed	2556 ft/min 779.07 meters/min

References
50 choices that tailor tractor power to your needs published in 1960, by Allis Chalmers
D10 D12 farm tractors published in 1961, by Allis Chalmers
Series II D-10 D-12 Tractors published in 1963, by Allis Chalmers
Series III D-10 D-12 Tractors published in 1966, by Allis Chalmers
D-12 Utility Tractor published in 1960, by Allis Chalmers
more work... less sweat published in 1962, by Allis Chalmers

Engine

Engine options
Allis-Chalmers 2.3L 4-cyl gasoline
Allis-Chalmers 2.4L 4-cyl gasoline

Engine Detail — 138.7 ci / 2.3 L Gasoline

Manufacturer	Allis-Chalmers
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled vertical L-head
Original engine, used until 149 ci engine appeared in 1961.
Displacement	138.7 ci 2.3 L
Bore/Stroke	3.375x3.875 inches 86 x 98 mm
Power	31 hp 23.1 kW
Air cleaner	oil bath
Compression	7.75:1
Rated RPM	1650
Starter volts	6
Oil capacity	4 qts 3.8 L
Coolant capacity	8 qts 7.6 L

Engine Detail — 149 ci / 2.4 L Gasoline

Manufacturer	Allis-Chalmers
Fuel Type	Gasoline
Configuration	4-cylinder, liquid-cooled
The larger, 149 cubic inch, engine was introduced on the D12 at serial number 3001 in 1961.
Displacement	149 ci 2.4 L
Bore/Stroke	3.50x3.875 inches 89 x 98 mm
Air cleaner	oil bath
Compression	7.5:1
Rated RPM	1650
Firing order	1-2-4-3

Transmission

Transmission — 4 forward and 1 reverse sliding gear

Type	sliding gear
Gears	4 forward and 1 reverse
Allis D12 with 10x24 rear tires.

Dimensions

Allis Chalmers D12 Tires
Ag front	5.00x15
Ag rear	10x24
Ag rear	11x24

Dimensions
Wheelbase	78.75 inches 200 cm
Length	121 inches 307 cm
Height (hood)	52.5 inches 133 cm
Height (exhaust)	76.5 inches 194 cm
Shipping weight	2,800 lbs 1270 kg
Ballasted weight	5,630 lbs 2553 kg
Clearance (front axle)	20.25 inches 51 cm
Clearance (rear axle)	22.25 inches 56 cm
Front tread	49.3 to 80 inches 125 to 203 cm
Rear tread	52 to 79.25 inches 132 to 201 cm

Tests

Tractor Tests
NTTL 723: 138 gasoline 4-speed 2WD
NTTL 813: 149 gasoline 4-speed 2WD

Nebraska Tractor Test 723
138 gasoline 4-speed 2WD October 13 - 20, 1959 Link: Nebraska Tractor Test 723 file
PTO performance
Power at rated engine speed	28.56 hp 21.3 kW
Fuel use	2.3 gal/hour 8.7 l/hour
Drawbar performance
Max power	23.56 hp 17.6 kW
Fuel use	2.2 gal/hour 8.3 l/hour
Gear 3 used for power test.
Max pull	4,041 lbs 1832 kg
Gear 1 used for pull test.

Nebraska Tractor Test 813
149 gasoline 4-speed 2WD April 4 - 19, 1962 Link: Nebraska Tractor Test 813 file
PTO performance
Power at rated engine speed	33.32 hp 24.8 kW
Fuel use	2.7 gal/hour 10.2 l/hour
Drawbar performance
Max power	29.43 hp 21.9 kW
Fuel use	2.8 gal/hour 10.6 l/hour
Gear 3 used for power test.
Max pull	4,241 lbs 1923 kg
Gear 1 used for pull test.

Photos

Allis Chalmers D12

Allis Chalmers D12

Allis Chalmers D12

Allis Chalmers D12

Allis-Chalmers D12 operator station and controls.