Allis Chalmers H3
The Allis Chalmers H3 is a compact tractor built for farm work. It has a gasoline engine with four cylinders and 149 cubic inches of displacement. The engine is liquid-cooled and naturally aspirated, meaning it doesn't use a turbocharger. It runs at 1650 RPM and has a cooling system that holds 9 quarts of coolant. This tractor is 108.75 inches long and 48.3 inches tall, making it suitable for various farm tasks. It weighs 7395 pounds, which gives it good stability. The H3 has a two-speed power shift transmission with 8 forward gears and 2 reverse gears. It uses mechanical clutches for steering and has an open center hydraulic system. The electric starter makes it easy to get the tractor running. One unique feature is its tall exhaust, which stands at 71.7 inches high.

Quick specs
- Category
- Utility
- Operating Weight
- 7,395 lb
- Transmission
- Two-Speed Power Shift, Mechanical Shuttle
Overview
About the Allis Chalmers H3
The Allis Chalmers H3 is a compact tractor built for farm work. It has a gasoline engine with four cylinders and 149 cubic inches of displacement. The engine is liquid-cooled and naturally aspirated, meaning it doesn't use a turbocharger. It runs at 1650 RPM and has a cooling system that holds 9 quarts of coolant. This tractor is 108.75 inches long and 48.3 inches tall, making it suitable for various farm tasks. It weighs 7395 pounds, which gives it good stability. The H3 has a two-speed power shift transmission with 8 forward gears and 2 reverse gears. It uses mechanical clutches for steering and has an open center hydraulic system. The electric starter makes it easy to get the tractor running. One unique feature is its tall exhaust, which stands at 71.7 inches high.
Full specifications
Every recorded spec
General
| Manufacturer | Allis Chalmers |
|---|---|
| Model | H3 |
| Category | Utility tractor |
| Operating weight | 7,395lb |
Engine
| Make | Allis Chalmers |
|---|---|
| Cylinders | 4 |
| Displacement | 149ci |
| Bore | 3.5in |
| Stroke | 3.88in |
Transmission
| Type | Two-Speed Power Shift, Mechanical Shuttle |
|---|---|
| Forward gears | 8 |
| Reverse gears | 2 |
Chassis & drive
| Steering | Mechanical Clutches |
|---|
Hydraulics
| Type | Open Center |
|---|
Dimensions
| Length | 108.75in |
|---|---|
| Height | 48.3in |
| Operating weight | 7,395lb |
Capacities
| Cooling system | 2.25gal |
|---|
Head to head
H3 vs. Utility median
How the Allis Chalmers H3 compares to other Utility tractors
| Spec | This model | Utility median | Difference | Percentile |
|---|---|---|---|---|
| Engine Displacement | 149 ci | 183 ci | -19% | 39th |
| Cylinders | 4 | 4 | at median | 50th |
| Forward Gears | 8 | 12 | -33% | 23rd |
| Operating Weight | 7,395 lb | 5,303 lb | +39% | 70th |
| Length | 109 in | 137 in | -20% | 15th |
| Height | 48.3 in | 94.1 in | -49% | 2nd |
Medians and percentiles are computed from the utility tractors in our database with a recorded value for each spec (sample sizes 4,321–5,720 models).
Compare to tractors with similar specs
Commonly compared Allis Chalmers tractors
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Allis Chalmers 180 | — | 10,300 lb | 1967–1973 | Compare → |
| Allis Chalmers 20-35 | — | 7,095 lb | — | Compare → |
| Allis Chalmers 25-40 E | — | 7,000 lb | — | Compare → |
| Allis Chalmers 440 | 218 hp | 20,230 lb | 1973–1977 | Compare → |
| Allis Chalmers 4W-220 | 220 hp | 21,475 lb | 1982–1984 | Compare → |
Commonly compared tractors with similar horsepower from other brands
| Tractor | Engine Power | Operating Weight | Years | Compare |
|---|---|---|---|---|
| Advance-Rumely 6A | — | 6,370 lb | — | Compare → |
| Advance-Rumely DoAll | — | 3,702 lb | — | Compare → |
| Advance-Rumely OilPull B 25/45 | — | 25,000 lb | — | Compare → |
| Advance-Rumely OilPull E 30/60 | — | 26,300 lb | — | Compare → |
| Advance-Rumely OilPull F 15/30 | — | 16,500 lb | — | Compare → |
Explore
Allis Chalmers siblings
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Gallery
Allis Chalmers H3 photos


FAQ
Common questions
How many cylinders does the Allis Chalmers H3 have?
The Allis Chalmers H3 runs a 4-cylinder engine with a displacement of 149 ci.
How much does the Allis Chalmers H3 weigh?
The Allis Chalmers H3 weighs about 7,395 lb in operating condition.
What transmission is in the Allis Chalmers H3?
Transmission on the Allis Chalmers H3 is Two-Speed Power Shift, Mechanical Shuttle, with 8 forward speeds.
What type of hydraulic system does the Allis Chalmers H3 use?
Hydraulics on the Allis Chalmers H3 are Open Center.
What maintenance does the Allis Chalmers H3 require?
Like any tractor, the Allis Chalmers H3 needs periodic engine oil and filter changes, hydraulic fluid checks, and regular greasing and inspection. The owner's manual lists the manufacturer's recommended service intervals.


