| Manufacturer |
Allis Chalmers |
| Price |
1,225(USD) |
| Model |
S |
| Equipment Type |
Agricultural Crawler Tractors |
| Factory |
Springfield, Illinois, USA |
VARIANTS
NEBRASKA TRACTOR TEST 286 2
| Description |
Diesel 5-speed crawler September 16 - 25, 1937 Link: Nebraska Tractor Test 286 file Drawbar performance Gear 1 used for power test Gear 1 used for pull test |
| Belt power (max) |
74.82hp / 55.8kW |
| Belt fuel use (max) |
6.0gal/hour / 22.7l/hour |
| Max power |
62.97hp / 47.0kW |
| Max pull |
16732lbs / 7589kg |
NEBRASKA TRACTOR TEST 337 2
| Description |
Gasoline 5-speed crawler November 18 - 24, 1939 Link: Nebraska Tractor Test 337 file PTO performance Drawbar performance |
| Max power |
68.9hp / 51.4kW |
| Fuel use |
8.2gal/hour / 31.0l/hour |
| Max pull |
11,367lbs / 5156kg |
ALLIS CHALMERS S POWER
| Drawbar (claimed) |
48hp / 35.8kW |
| Belt (claimed) |
66hp / 49.2kW |
| Drawbar (tested) |
68.9hp / 51.4kW |
| PTO (tested) |
84.3hp / 62.9kW |
| Belt (tested) |
74.82hp / 55.8kW |
ENGINES OVERVIEW
The Allis Chalmers S tractor is equipped with a robust 11.1L 4-cylinder engine, available in both diesel and gasoline variants. The diesel engine typically offers higher torque and fuel efficiency, making it advantageous for heavy-duty applications, while the gasoline version may provide quicker start-ups and lower initial costs. However, consider the potential challenges of higher fuel prices and maintenance requirements with the diesel model compared to the more readily available gasoline option.
| Description |
Allis Chalmers 11.1L 4-cyl diesel Allis Chalmers 11.1L 4-cyl gasoline |
ENGINE DETAIL 1
The Allis Chalmers S tractor features a robust 4-cylinder diesel engine with a significant displacement of 675.1ci (11.1L) and mechanical fuel injection, ensuring efficient fuel combustion and power delivery. With a low compression ratio of 6.5:1 and a rated RPM of 1050, it is optimized for low-end torque, making it suitable for heavy-duty applications like plowing and hauling. However, the oil bath air cleaner may require more maintenance than modern paper filters, possibly affecting operational efficiency over time.
| Description |
Allis Chalmers diesel 4-cylinder liquid-cooled vertical I-head/Oil engine, burned diesel with fuel injection and spark ignition, used on the SO model |
| Displacement |
675.1ci / 11.1L |
| Bore/Stroke |
5.75x6.50inches / 146x 165mm |
| Fuel system |
mechancal injection |
| Air cleaner |
oil bath |
| Compression |
6.5:1 |
| Rated RPM |
1050 |
| Starter volts |
6 |
| Coolant capacity |
50qts / 47.3L |
ENGINE DETAIL 2
The Allis Chalmers S tractor features a robust 4-cylinder liquid-cooled engine with a significant displacement of 675.1 ci, ensuring ample torque for various agricultural tasks. With a low compression ratio of 5:1 and rated RPM of 1050, this tractor is designed for durability and ease of operation at lower speeds, making it ideal for heavy-duty farming applications. However, the 6-volt starter system may pose challenges in cold starts and require careful maintenance for reliability.
| Description |
Allis Chalmers gasoline 4-cylinder liquid-cooled vertical I-head |
| Displacement |
675.1ci / 11.1L |
| Bore/Stroke |
5.75x6.50inches / 146x 165mm |
| Compression |
5:1 |
| Rated RPM |
1050 |
| Starter volts |
6 |
| Oil capacity |
20qts / 18.9L |
ALLIS CHALMERS S ENGINES
The Allis Chalmers S tractor is equipped with a robust 11.1L 4-cylinder engine, offering both diesel and gasoline variants, catering to diverse operational needs. A substantial 64-gallon fuel tank provides extended operational range, minimizing downtime during extensive tasks such as plowing or heavy towing. However, the weight and size of the engine can lead to challenges in maneuverability on smaller farms or tight spaces.
| Description |
Allis Chalmers 11.1L 4-cyl diesel Allis Chalmers 11.1L 4-cyl gasoline |
| Fuel tank |
64gal / 242.2L |
TRANSMISSION
The Allis Chalmers S tractor features a gear transmission with 5 forward and 1 reverse gear, providing adequate versatility for a range of agricultural tasks. The dry disc clutch offers durability and a straightforward maintenance approach, although it may require more frequent adjustments compared to wet clutches in heavier use scenarios. Its oil capacity of 23 quarts (21.8L) ensures sufficient lubrication for smooth operation, but operators should monitor oil levels closely to prevent overheating during extensive projects.
| Type |
gear |
| Gears |
5 forward and 1 reverse |
| Clutch |
dry disc |
| Oil capacity |
23qts / 21.8L |
MECHANICAL
The Allis Chalmers S tractor features a crawler chassis, providing enhanced traction and stability on uneven terrain, which is advantageous for agricultural tasks and land management. Its open operator station may offer better visibility, but it lacks weather protection, presenting a challenge in inclement conditions. The 5-speed gear transmission allows for versatility in various operational scenarios, enabling efficient speed adjustments based on workload and terrain type.
| Chassis |
crawler |
| Cab |
Open operator station |
| Transmission |
5-speed gear |
DIMENSIONS
| Length |
146inches / 370cm |
| Width |
97inches / 246cm |
| Height |
74inches / 187cm |
| Weight |
20100lbs / 9117kg |
| Gauge |
62inches / 157cm |
DIMENSIONS & TRACKS
| Weight |
20100lbs / 9117kg |
| Description |
tracks |
S SERIAL NUMBERS
| Location |
transmission case or instrument panel |
| 1937 |
3 |
| 1938 |
413 |
| 1939 |
585 |
| 1940 |
1085 |
| 1941 |
1128 |
| 1942 |
1212 |
| Last |
1227 |
