Production

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

Engine

Engine type	Allis-Chalmers 2.3L 4-cyl gasoline / Allis-Chalmers 2.4L 4-cyl gasoline
Fuel tank	12.5 gal (47.3 L)
Air cleaner	oil bath / oil bath
Bore/Stroke	3.375x3.875 inches (86 x 98 mm) / 3.50x3.875 inches (89 x 98 mm)
Compression	7.75:1 / 7.5:1
Coolant capacity	8 qts (7.6 L)
Description	Allis-Chalmers / gasoline / 4-cylinder / liquid-cooled vertical L-head / Original engine, used until 149 ci engine appeared in 1961. / Allis-Chalmers / gasoline / 4-cylinder / liquid-cooled / The larger, 149 cubic inch, engine was introduced on the D12 at serial number 3001 in 1961.
Displacement	138.7 ci (2.3 L) / 149 ci (2.4 L)
Firing order	1-2-4-3
Oil capacity	4 qts (3.8 L)
Power	31 hp (23.1 kW)
Rated RPM	1650 / 1650
Starter volts	6
Engine type	Allis-Chalmers 2.3L 4-cyl gasoline / Allis-Chalmers 2.4L 4-cyl gasoline
Drawbar (claimed)	25.75 hp (19.2 kW)
Drawbar (tested)	29.43 hp (21.9 kW)
PTO (claimed)	30 hp (22.4 kW)
PTO (tested)	33.32 hp (24.8 kW)

Transmission

Gears	4 forward and 1 reverse
Transmission type	4-speed sliding gear
Type	sliding gear

Mechanical

Cab	Open operator station.
Drive type	Two-wheel drive

Hydraulics

Type	live
Valves	1 or 2

Hitch

Rear Type	I
Type	Snap-Couple

PTO

Rear PTO Type	540

Dimensions & Tires

Ag front	5.00x15
Ag rear	10x24 / 11x24
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)
Height (exhaust)	76.5 inches (194 cm)
Height (hood)	52.5 inches (133 cm)
Length	121 inches (307 cm)
Rear tread	52 to 79.25 inches (132 to 201 cm)
Shipping weight	2,800 lbs (1270 kg)
Wheelbase	78.75 inches (200 cm)
Front tire	5.00x15
Rear tire	10x24
Weight	2,800 lbs (1270 kg)
Wheelbase	78.75 inches (200 cm)

Belt Pulley

RPM	1220
Speed	2556 ft/min (779.07 meters/min)

D12 Serial Number Location

Description	Serial number stamped into the flange where the engine and transmission meet on the left side of the tractor.

D12 Serial Numbers

1959	1001
1960	1950
1961	2801
1962	3638
1963	5501
1964	6012
1965	9192
1966	9508
1967	9830
Description	FAQ: How to read a serial number table.

Nebraska Tractor Test 723

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

Nebraska Tractor Test 813

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

References

Description

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

Speeds

Description	Allis D12 with 10x24 rear tires.

Tractor Tests

Description	NTTL 723: 138 gasoline 4-speed 2WD / NTTL 813: 149 gasoline 4-speed 2WD

Variants

D10	single-row tractor
D12 High Clearance	cultivation tractor

Allis-Chalmers D12 Specs ( 1959-1968 )