Allis Chalmers industrial tractors

Allis Chalmers D-12

The Allis Chalmers D-12 is an industrial tractor produced from 1959 to 1964 by Allis Chalmers in West Allis, Wisconsin, USA. It features a 2.4L 4-cylinder gasoline engine producing 39 hp net, with a 4-speed sliding gear transmission. The tractor is two-wheel drive with manual steering and drum brakes, and has an open operator station. It includes hydraulics with an open center system, 1500 psi pressure, and 1 or 2 valves. The rear hitch is a Snap-Couple type with a rear PTO operating at 540 RPM at 1650 engine RPM. Dimensions include a 78.75 inch wheelbase, 121 inch length, and a shipping weight of 3200 lbs. Attachments available include the L-102 front-end loader and Allis-Chalmers Mark I and Mark TEN backhoes.

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ModelD-12

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Technical Specifications

Detailed specifications and technical data for Allis Chalmers D-12

Power

Engine (net)	39 hp (29.1 kW)
PTO (claimed)	35.3 hp (26.3 kW)
Drawbar (claimed)	30.6 hp (22.8 kW)

Tires

Ag rear	11.2x24, 12.4x24
Ag front	5.00x15, 6.00x16

Engine

Type	gasoline, 4-cylinder, liquid-cooled
Model	Allis-Chalmers 2.4L 4-cyl gasoline
Torque	137 lb-ft (185.8 Nm)
Fuel tank	12.5 gal (47.3 L)
Rated RPM	1650
Air cleaner	oil bath
Bore/Stroke	3.50x3.875 inches (89 x 98 mm)
Compression	7.5:1
Power (net)	39 hp (29.1 kW)
Displacement	149 ci (2.4 L)
Firing order	1-2-4-3
Oil capacity	4.5 qts (4.3 L)
Starter volts	12
Coolant capacity	8 qts (7.6 L)

Dimensions

Length	121 inches (307 cm)
Wheelbase	78.75 inches (200 cm)
Rear tread	52 to 79.25 inches (132 to 201 cm)
Front tread	49.3 to 80 inches (125 to 203 cm)
Height (hood)	52.5 inches (133 cm)
Shipping weight	3200 lbs (1451 kg)
Height (exhaust)	76.5 inches (194 cm)
Clearance (rear axle)	22 inches (55 cm)
Clearance (front axle)	21.25 inches (53 cm)

Hydraulics

Type	open center
Valves	1 or 2
Pressure	1500 psi (103.4 bar)
Pump flow	3.56 gpm (13.5 lpm)

Mechanical

Drive	Two-wheel drive
Brakes	Drum brakes
Steering	Manual steering
Operator station	Open operator station

Production

Type	Industrial tractor
Built in	West Allis, Wisconsin, USA
Years produced	1959 - 1964

Attachments

Backhoe	[object Object],[object Object]
Front-end loader	L-102 Loader: 2000 lbs lift (full at pin) (907 kg), 3200 lbs breakout (1451 kg), 30 inches reach (dumped) (76 cm), 6° rollback, 100 inches clearance (dumped) (254 cm), weight: 1020 lbs (462 kg) (Weight of loader without bucket)

Belt Pulley