| Manufacturer | Allis Chalmers |
| Price | 1,541(USD) |
| Model | UC |
| Equipment Type | Row-Crop Tractors |
| Factory | West Allis, Wisconsin, USA |
ALLIS CHALMERS UC POWER
| Drawbar (claimed) | 19hp / 14.2kW |
| Belt (claimed) | 31hp / 23.1kW |
| Plows | 3 |
| Drawbar (tested) | 21.14hp / 15.8kW |
| Belt (tested) | 34.09hp / 25.4kW |
ENGINES OVERVIEW
The Allis Chalmers UC tractor features a robust 4.9L to 5.2L 4-cylinder gasoline engine, providing a balance of power and fuel efficiency suitable for various agricultural applications. A key advantage is its straightforward design, which allows for easy maintenance and repairs. However, the limited horsepower compared to modern tractors could be a constraint for heavy-duty tasks, making it most suitable for smaller farms or specific tasks where high torque is not critical.
| Description | Allis-Chalmers 4.9L 4-cyl gasoline Allis-Chalmers 5.2L 4-cyl gasoline |
ENGINE DETAIL 1
The Allis Chalmers UC tractor features a 4-cylinder 301 Allis engine, notable for its 300.7 ci displacement and low-rated RPM of 1200, which is advantageous for providing consistent torque at lower speeds, making it suitable for heavy-duty agricultural tasks. Its bore and stroke dimensions (4.375x5.00 inches) ensure a balanced power delivery, although the lower RPM could limit its efficiency in high-speed applications. Given its production years from 1933 to 1936, the UC model reflects vintage engineering, which may present challenges with parts availability and modern compatibility, but offers nostalgic value and simplicity in design for restoration enthusiasts.
| Description | Allis-Chalmers gasoline 4-cylinder vertical I-head The 301 Allis engine replaced was the second engine on the All-Crop UC. It was used from 1933 until 1936; tractor serial numbers UC1369 though UC2281 |
| Displacement | 300.7ci / 4.9L |
| Bore/Stroke | 4.375x5.00inches / 111x 127 mm |
| Rated RPM | 1200 |
ENGINE DETAIL 2
The Allis Chalmers UC tractor features a 318ci (5.2L) gasoline 4-cylinder liquid-cooled engine with a relatively long stroke of 5.00 inches, offering a balance of torque and lower peak RPM of 1200, ideal for heavy-duty agricultural tasks. Its 24-quart coolant capacity ensures efficient temperature regulation, crucial for maintaining engine performance during prolonged use. While the tractor's engine design promotes durability, the lower RPM may limit speed and power efficiency in specific operational scenarios.
| Description | Allis-Chalmers gasoline 4-cylinder liquid-cooled vertical I-head The 318 Allis was the final engine, introduced in 1936 on tractor serial number UC2282 |
| Displacement | 318ci / 5.2L |
| Bore/Stroke | 4.50x5.00inches / 114x 127 mm |
| Rated RPM | 1200 |
| Coolant capacity | 24qts / 22.7L |
ALLIS CHALMERS UC ENGINES
The Allis Chalmers UC tractor features a robust 4.9L and 5.2L gasoline engine, providing sufficient power for various agricultural tasks. With a 24-gallon (90.8L) fuel tank and an auxiliary 1-gallon (3.8L) capability, it offers extended run times, minimizing refueling interruptions during field operations. However, the reliance on gasoline might limit efficiency compared to diesel alternatives in fuel economy and torque, especially when handling heavier workloads.
| Description | Allis-Chalmers 4.9L 4-cyl gasoline Allis-Chalmers 5.2L 4-cyl gasoline |
| Fuel tank | 24gal / 90.8L |
| Aux. fuel | 1 gal /3.8 L |
TRANSMISSIONS OVERVIEW
The Allis Chalmers UC tractor features either a 3-speed or a 4-speed non-synchronized gear transmission, which provides operators with options for optimal torque management in varying field conditions. The non-synchronized nature can lead to gear engagement challenges, particularly during on-the-go shifting, requiring operators to match engine and wheel speeds carefully. This tractor is well-suited for applications that demand consistent power delivery at lower speeds, such as tilling or hauling.
| Description | 3-speed non-synchronized gear/4-speed non-synchronized gear |
TRANSMISSION 1
The Allis Chalmers UC tractor features a non-synchronized gearbox with 3 forward and 1 reverse gear, which may pose challenges in shifting under load due to lack of synchronization. This gearbox design can be advantageous for simplicity and reliability in low-speed applications, but operators should be skilled in double-clutching techniques to avoid gear clash. Ideal for tasks requiring low-end torque, this tractor is particularly suited for small-scale farming and utility work, where maneuverability is key.
| Type | non-synchronized gear |
| Gears | 3 forward and 1 reverse |
TRANSMISSION 2
The Allis Chalmers UC tractor features a non-synchronized gear transmission with 4 forward and 1 reverse gear, which allows for straightforward operation but may require careful shifting to prevent gear grinding. The simplicity of this transmission design enhances reliability and ease of maintenance, making it suitable for smaller farms or vintage agricultural exhibits. However, the lack of synchronization can pose challenges in precise speed control during varied field conditions.
| Type | non-synchronized gear |
| Gears | 4 forward and 1 reverse |
MECHANICAL
The Allis Chalmers UC features a 4x2 2WD chassis, providing efficient operation on flat terrains but limiting traction on uneven ground, which may impede performance in challenging conditions. The open operator station enhances visibility and comfort but increases operator exposure to environmental elements. Its 3-speed and 4-speed non-synchronized gear transmissions offer simplicity and ease of maintenance, although shifting may require more operator skill for smooth transitions.
| Chassis | 4x2 2WD |
| Cab | Open operator station. |
| Transmissions | 3-speed non-synchronized gear/4-speed non-synchronized gear |
ALLIS CHALMERS UC TIRES
The Allis Chalmers UC tractor features Ag front tires (6.00x16) providing enhanced maneuverability for tight spaces, while the Ag rear tires (12.75x24) offer improved traction and stability for heavy agricultural tasks. This tire configuration supports various field operations but may limit road speed due to smaller front tires. Ideal for small to medium-sized farms, its compact dimensions facilitate mobility in confined areas, although it may struggle with larger attachments due to power limitations.
| Ag front | 6.00x16 |
| Ag rear | 12.75x24 |
DIMENSIONS
| Wheelbase | 87inches / 220cm |
| Length | 145inches / 368cm |
| Width | 81inches / 205cm |
| Height | 69.5inches / 176cm |
| Weight | 5815lbs / 2637kg |
DIMENSIONS & TIRES
The Allis Chalmers UC tractor features a compact wheelbase of 87 inches, which enhances maneuverability in tight spaces, making it suitable for small farms or gardens. Weighing in at 5815 lbs provides stability during operation, particularly when using implements that require significant traction. However, the narrow front tire size (24x5) may limit flotation and performance in soft ground conditions, necessitating careful consideration of terrain before use.
| Wheelbase | 87inches / 220cm |
| Weight | 5815lbs / 2637kg |
| Front tire | 24x5 |
| Rear tire | 42x2 |
UC SERIAL NUMBERS
| Location | Rear axle near PTO |
| 1930 | UC1 |
| 1931 | UC39 |
| 1932 | UC1100 |
| 1933 | UC1232 |
| 1934 | UC1294 |
| 1935 | UC1552 |
| 1936 | UC2001 |
| 1937 | UC2771 |
| 1938 | UC3757 |
| 1939 | UC4547 |
| 1940 | UC4770 |
| 1941 | UC4972 |
| 1944 | 5038 |
| 1947 | 5068 |
| 1948 | 5268 |
| 1949 | 5526 |
| 1950 | 5644 |
| 1951 | 5806 |
| 1952 | 5939 |
| 1953 | 6143 |
BELT PULLEY
| Diameter | 10inches / 25cm |
| Width | 7.5inches / 19cm |
| RPM | 1095 |
| Speed | 2870ft/min / 874.78 meters/min |