| Manufacturer | Allis Chalmers |
| Price | 1,900(USD) |
| Model | CA |
| Equipment Type | Row-Crop Tractors |
| Factory | West Allis, Wisconsin, USA |
NEBRASKA TRACTOR TEST 453 2
| Description | Gasoline 4-speed 2WD November 31 - 9, 1950 Link: Nebraska Tractor Test 453 file Drawbar performance Gear 2 used for power test. Gear 1 used for pull test. |
| Belt power (max) | 25.96hp / 19.4kW |
| Belt fuel use (max) | 2.4gal/hour / 9.1l/hour |
| Max power | 22.97hp / 17.1kW |
| Max pull | 3,557lbs / 1613kg |
ALLIS CHALMERS CA POWER
| Drawbar (claimed) | 18hp / 13.4kW |
| PTO (claimed) | 23hp / 17.2kW |
| Drawbar (tested) | 22.97hp / 17.1kW |
| Belt (tested) | 25.96hp / 19.4kW |
ENGINE DETAIL
The Allis Chalmers CA tractor features a 2.1L liquid-cooled, 4-cylinder engine with a modest compression ratio of 6.25:1, suitable for lower RPM operations at 1650 RPM, which enhances durability and reduces stress on the engine. Its oil bath air cleaner effectively provides engine protection, but maintenance is crucial to ensure optimal performance. While the point gap and valve clearances are relatively tight, proper adjustment is vital, as failure to do so may lead to decreased efficiency and potential engine misfire, particularly given the limited firing order sequence.
| Description | Allis Chalmers gasoline 4-cylinder 8-valve liquid-cooled vertical I-head |
| Displacement | 125.2ci / 2.1L |
| Bore/Stroke | 3.375x3.50inches / 86x 89 mm |
| Air cleaner | oil bath |
| Compression | 6.25:1 |
| Rated RPM | 1650 |
| Firing order | 1-2-4-3 |
| Starter volts | 6 |
| Coolant capacity | 9 qts /8.5 L |
| Sparkplug | AC45/Autolite A-7/Autolite A-9/Champion J-8 |
| Sparkplug gap | 0.030inches / 0.762 mm |
| Point gap | 0.020inches / 0.508 mm |
| Intake valve clearance | 0.012inches / 0.305 mm (hot) |
| Exhaust valve clearance | 0.012inches / 0.305 mm (hot) |
ALLIS CHALMERS CA ENGINE
The Allis Chalmers CA, equipped with a 2.1L 4-cylinder gasoline engine, offers a balance of power and fuel efficiency for light to medium agricultural tasks. Its compact size and maneuverability make it ideal for small farms and gardens, although limited horsepower may restrict performance in more demanding applications like plowing or heavy tilling. Owners should be aware of the outdated technology in terms of operator comfort and emissions standards compared to newer tractors.
| Description | Allis Chalmers 2.1L 4-cyl gasoline |
TRANSMISSION
The Allis Chalmers CA tractor features a non-synchronized transmission with four forward and one reverse gear, limiting smooth shifting, particularly under load. The use of a dry disc clutch can provide reliable engagement but may require more frequent maintenance and can be less forgiving in terms of operation compared to wet clutches. With an oil capacity of only 4 quarts (3.8 L), regular oil checks and changes are critical to prevent potential lubrication issues during intensive use.
| Type | non-synchronized |
| Gears | 4 forward and 1 reverse |
| Clutch | dry disc |
| Oil capacity | 4 qts /3.8 L |
MECHANICAL
The Allis Chalmers CA tractor features a 4x2 2WD chassis, providing basic traction suitable for lighter farming tasks but may struggle in slippery conditions. Its manual steering and differential mechanical contracting band brakes offer simplicity and ease of maintenance, albeit with less precision and stopping power compared to modern systems. The 4-speed non-synchronized transmission is advantageous for novice operators but can pose challenges when shifting under load, making it less ideal for heavy-duty applications.
| Chassis | 4x2 2WD |
| Steering | manual |
| Brakes | differential mechanical contracting band |
| Cab | Open operator station |
| Transmission | 4-speed non-synchronized |
CAPACITY
| Fuel | 13gal / 49.2L |
| Hydraulic system | 2 gal /7.6 L |
HYDRAULICS
| Capacity | 2 gal /7.6 L |
| Pressure | 3200psi / 220.6bar |
TRACTOR HITCH
| Type | Allis Snap Coupler*Available after 1954. |
POWER TAKE-OFF (PTO)
| Rear PTO | live |
| Rear RPM | 538 |
ALLIS CHALMERS CA TIRES
The Allis Chalmers CA tractor is equipped with a 5.00-15 front tire and a 10-24 rear tire, offering a balanced configuration for optimal traction and stability in various agricultural tasks. The narrower front tire improves maneuverability in tight spaces while the larger rear tire enhances power transfer and load capacity, making it suitable for lighter field work and gardening. However, operators should be cautious of soil compaction with the rear tire size, especially in softer ground conditions, potentially impacting crop yield.
| Ag front | 5.00-15 |
| Ag rear | 10-24 |
DIMENSIONS
| Wheelbase | 82inches / 208cm |
| Length | 125inches / 317cm |
| Height | 73inches / 185cm |
| Operating weight | 2835lbs / 1285kg |
| Ballasted weight | 5045lbs / 2288kg |
| Front tread | 6.25/13inches / 15/33 cm |
| Rear tread | 52 to 80inches / 132to 203 cm |
DIMENSIONS & TIRES
The Allis Chalmers CA tractor, with an 82-inch wheelbase and a weight of 2,835 lbs, offers stability yet may face challenges in maneuverability in tight spaces. The front tire size of 5.00-15 provides suitable traction for lighter tasks, while the rear tire size of 10-24 enhances power delivery for heavier loads, making it ideal for small farm operations or gardening. However, the age of this model may require careful consideration of parts availability and maintenance challenges.
| Wheelbase | 82inches / 208cm |
| Weight | 2835lbs / 1285kg |
| Front tire | 5.00-15 |
| Rear tire | 10-24 |
CA SERIAL NUMBERS
| Location | On top of transmission, by shift lever |
| 1950 | 14 |
| 1951 | 322 |
| 1952 | 10539 |
| 1953 | 22181 |
| 1954 | 31424 |
| 1955 | 32907 |
| 1956 | 37203 |
| 1957 | 38618 |
| 1958 | 38977 |
| Final | 39513 |
BELT PULLEY
| Diameter | 8 inches /20 cm |
| Width | 5.5inches / 13cm |
| RPM | 1220 |
| Speed | 2555ft/min / 778.76 meters/min |
ELECTRICAL
| Ground | positive |
| Charging system | generator |
| Charging amps | 10 |
| Battery volts | 6 |
| Battery AH | 95 |