Allis Chalmers C
Power
21 hp[P] hp
Production
1940-1949
Engine
4-cylinder 8-valve
Transmission
Non-synchronized gear
Weight
2500 lbs [1134 kg]
Drive
2WD
From the same series:
Introduction
Allis Chalmers C: Technical Overview
The Allis Chalmers C is a row-crop tractor produced between 1940 and 1949 at the manufacturer's facility in West Allis, Wisconsin. As a staple of mid-century agricultural mechanization, this two-wheel-drive machine was designed for versatility and operational simplicity, with 84,020 units manufactured during its production run.
Engine and Performance
The tractor is powered by a 125.2 cubic inch (2.1 L) liquid-cooled, 4-cylinder, 8-valve engine. It operates at a rated speed of 1500 RPM, delivering 21 horsepower. The engine utilizes an oil bath air cleaner to maintain intake purity and features a compression ratio of 5.75:1. Maintenance requirements include specific valve clearances of 0.010 inches for both intake and exhaust, and a spark plug gap of 0.035 inches.
Transmission and Drivetrain
Power is transferred through a non-synchronized gear transmission offering three forward speeds and one reverse speed. The transmission system requires SAE20W oil, with a capacity of 6 quarts (5.7 L), or 7 quarts (6.6 L) when equipped with a Power Take-Off (PTO). The rear PTO is a transmission-driven unit operating at 560 RPM, allowing for the connection of various trailing implements.
Chassis and Dimensions
The Allis Chalmers C features a 77-inch wheelbase with an overall length of 114 inches. The machine weighs 2,500 lbs, providing a stable footprint for field work. The front tread is fixed at 82 inches, while the rear tread is adjustable between 52 and 80 inches to accommodate various row widths. Steering is manual, assisted by mechanical drum brakes for stopping control.
Electrical System
The tractor is equipped with a 6-volt electrical system featuring a 95 Ah battery and a generator-based charging system that provides 12 amperes of current. The system uses a positive ground configuration, typical of tractors from this era.
Conclusion
With its robust design, mechanical simplicity, and adjustable tread widths, the Allis Chalmers C was engineered as a reliable row-crop tractor for mid-20th-century farming operations. Its combination of a 21-horsepower engine and a straightforward transmission made it a functional solution for a wide range of agricultural tasks.
Allis Chalmers C Manuals & Documentation
Download the manuals and documentation available for the Allis Chalmers C: repair and workshop manuals, operator's handbooks, spare-parts catalogs and technical leaflets — free PDF files.
Archive documentation provided for reference, hosted by Tractor-Info.
Production Information of Allis Chalmers, C
- Original price was $1,200 in 1949
- Row-Crop tractor
- Built in West Allis, Wisconsin, USA
| Manufacturer | Allis Chalmers |
|---|---|
| Total built | 84,020 |
Dimension and Tires Information of Allis Chalmers, C
| Rear tread | 52 to 80 inches [132 to 203 cm] |
|---|---|
| Wheelbase | 77 inches [195 cm] |
| Weight | 2500 lbs [1134 kg] |
| Height | 62.75 inches [159 cm] |
| Length | 114 inches [289 cm] |
| Front tread | 82 inches [208 cm] |
| Width | 68.5 inches [173 cm] |
| Ag front | 4.00-15 |
|---|---|
| Ag rear | 10-24 |
| Ag rear | 9-24 |
| Ag front | 6-12 |
Engine Specifications of Allis Chalmers, C
- Liquid-cooled
- 4-cylinder 8-valve
| Intake valve clearance | 0.010 inches [0.254 mm] |
|---|---|
| Point gap | 0.020 inches [0.508 mm] |
| Compression | 5.75:1 |
| Exhaust valve clearance | 0.010 inches [0.254 mm] |
| Firing order | 1-2-4-3 |
| Coolant capacity | 8 qts [7.6 L] |
| Rated RPM | 1500 |
| Displacement | 125.2 ci [2.1 L] |
| Air cleaner | Oil bath |
| Oil capacity | 4 qts [3.8 L] |
| Bore/Stroke | 3.375x3.50 inches [86 x 89 mm] |
| Sparkplug gap | 0.035 inches [0.889 mm] |
| Intake valve clearance | 0.010 inches (hot) [0.254 mm] |
| Exhaust valve clearance | 0.010 inches (hot) [0.254 mm] |
| Exhaust valve clearance(optional) | AC 45 |
| Sparkplug | Autolite AN 7 |
Transmission Information of Allis Chalmers, C
Transmission variants 1
| Type | Non-synchronized gear |
|---|---|
| Oil type | SAE20W |
| Oil type(optional) | 7 qts (with PTO) [6.6 L] |
| Gears | 3 forward and 1 reverse |
| Gears(optional) | SAE20W |
| Oil capacity | 6 qts [5.7 L] |
Mechanical Specs of Allis Chalmers, C
- Two-wheel drive
- Open operator station.
- Manual steering
- Mechanical drum brakes
Power Information of Allis Chalmers, C
| Rear PTO | Transmission |
|---|---|
| Rear PTO Type | 560 |
Electrical System of Allis Chalmers, C
| Ground | Positive |
|---|---|
| Battery AH | 95 |
| Battery volts | 6 |
| Charging system | Generator |
| Charging amps | 12 |
Where it sits
With 21 hp[P] HP, the Allis Chalmers C sits between RC (18 HP) and CA (25 HP) in Allis Chalmers's range. Its power puts it in the 17th percentile of 1940s models in our database (263 machines).
Frequently asked questions
How much horsepower does the Allis Chalmers C have?
The Allis Chalmers C delivers 21 hp[P] HP.
What years was the Allis Chalmers C produced?
The Allis Chalmers C was produced in 1940-1949.
What engine does the Allis Chalmers C have?
The Allis Chalmers C is powered by a 4-cylinder 8-valve engine.
What transmission does the Allis Chalmers C use?
The Allis Chalmers C uses a Non-synchronized gear transmission.
How much does the Allis Chalmers C weigh?
The Allis Chalmers C weighs 2500 lbs [1134 kg].
Is the Allis Chalmers C 4WD?
The Allis Chalmers C is available in 2WD.