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Allis Chalmers D12 Specifications

AC D12 Engine Technical Data

Engine Model ................ Allis Chalmers
Engine Type ................ Vertical, 4-cycle 4-cylinder gasoline
Number of Cylinders ................ 4
Displacement, cu in (L) ................ 149 (2.40)
Engine Bore, in (mm) ................ 3.50 (89.0)
Engine Stroke, in (mm) ................ 3.88 (98.0)
Rated Engine Power, hp (kW) ................ 33.0 (24.4)
Rated Engine Speed, rpm ................ 1650
Compression ................ 7.5:1
Firing Order ................ 1-2-4-3
Air Cleaner ................ Oil bath
Spark Plug Gap, in (mm) ................ 0.025 (0.635)
Point Gap, in (mm) ................ 0.022 (0.559)
Intake Valve Clearance, in (mm) ................ 0.009 (0.229)
Exhaust Valve Clearance, in (mm) ................ 0.015 (0.381)
Fuel Tank Capacity, gal (L) ................ 12.5 (47.3)
Oil Capacity, qts (L) ................ 4.0 (3.8)
Coolant Capacity, qts (L) ................ 9.0 (8.5)
Electrical System Rating, Volts ................ 6

Allis Chalmers D12 Power Take-Off

PTO Operational Type ................ Live
PTO Horsepower, hp (kW) ................ 30.0 (22.2)
PTO Speed, rpm ................ 540

Transmission Configuration

Transmission Type ................ Sliding gear
Gearbox Type ................ 4F/1R, partial powershift
Number of Forward Gears ................ 4
Number of Reverse Gears ................ 1
Clutch Type ................ Dry disc
Maximum Forward Speed, mph (kph) ................ 11.4 (18.3)
Maximum Reverse Speed, mph (kph) ................ 3.5 (5.6)

AC D12 Wheels and Tires

Drive Wheels ................ 2WD 4x2
Steering Configuration ................ Front steer
Steering System ................ Manual
Brakes Type ................ Mechanical expanding shoe
Front Tire Size ................ 5.00-15
Rear Tire Size ................ 10.0-24
Front Tread Width, in (mm) ................ 49.3-80 (1250-2030)
Rear Tread Width, in (mm) ................ 52-79.3 (1320-2010)

Allis Chalmers D12 Hydraulic System

Hydraulic System Type ................ Live
Number of Standard Remote Valves ................ 1/2
Rear Hitch Type ................ Snap-Couple
3-Point Hitch Category ................ 1

Dimensions and Weight

Wheelbase, in (mm) ................ 78.8 (2000)
Length, in (mm) ................ 121 (3070)
Height (Hood), in (mm) ................ 52.5 (1330)
Height (Exhaust), in (mm) ................ 76.5 (1940)
Overall Width, in (mm) ................ 65 (1645)
Ground Clearance, in (mm) ................ 20.3 (510)
Weight (Shipping), lb (kg) ................ 2800 (1270)
Weight (Ballasted), lb (kg) ................ 5630 (2555)