Allis Chalmers RC

Last Updated: July 2024

Overview

The Allis Chalmers model RC is a classic row-crop tractor that was designed for agricultural tasks such as planting and cultivating rows of crops. Its chassis configuration is a simple 4x2 2WD, making it suitable for general farming, but not ideal for heavy traction tasks. The tractor operates on a 4-cylinder, liquid-cooled, Allis-Chalmers distillate engine with a displacement of 125.2 cubic inches and is rated at 1500 RPM. Its transmission is a straightforward non-synchronized gear type, with four forward and one reverse gear. Notable for its era, the tractor sports steel wheels with a front rim diameter of 24 inches and a rear rim diameter of 40 inches. It measures 126 inches in length and 66 inches in height, with an operating weight ranging from 2495 pounds (shipping) to 4005 pounds when ballasted. The exact horsepower rating is unspecified, but given the typical performance of engines for tractors of this type, one can expect it to be sufficient for the agricultural tasks it was designed for. The simplicity of design speaks to its era of manufacture, which remains unknown but is indicative of mid-20th century tractor technology.
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Key Specifications

Category: Row Crop

Transmission: Non-synchronized gear

Drive Type: 2WD

Operating Weight: Shipping: 2495 | Ballasted: 4005

Fuel Type: Distillate

Allis Chalmers RC vs. Similar Tractors

Operating Weight
Above Average
Greater than 88% of similar tractors.

Technical Specifications

Engine

Manufacturer
Allis-Chalmers
Model
-
Cooling Type
Liquid-cooled
Cylinder Orientation
Vertical
Valve Configuration
I-head
Fuel Type
Distillate
Induction Type
-
Cylinders
4
Displacement (ci)
125.2
Bore (in)
3.375
Stroke (in)
3.5
Rated RPM
1500
Power Output (hp)
-

Transmission

Type
Non-synchronized gear
Forward Gears
4
Reverse Gears
1
Total Gears
-

Dimensions

Length (in)
126
Width (in)
-
Height (in)
66
Operating Weight (lb)
Shipping: 2495 | Ballasted: 4005

Power Take-Off (PTO)

PTO Type
-
PTO Speed 1 (rpm)
-
PTO Speed 2 (rpm)
-
PTO Speed 3 (rpm)
-

Miscellaneous

Chassis
4x2 2WD
Drive Type
2WD
Steering Type
-
Coolant Capacity (qts)
9
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
-
Front/Rear Rim Diameter (in)
-
Tire Type
Steel
Manufacture - End Year
-
Hitch Type
-
Hitch Category
-
Hitch Position
-
Hitch Capacity (lb)
-
Operator Station Type
-
Starter Type
-
Brake Type
-
Hydraulic System Type
-

Test Results

Nebraska Tractor Test Laboratory - Test Date: April 19 to 24, 1939

Maximum Power and Fuel Consumption

  • Observed Maximum Belt Horsepower: 18.21 HP
  • Calculated Maximum Belt Horsepower: 19.01 HP (based on 60°F and 29.92" Hg)
  • Fuel Consumption: 6.92 pounds per gallon of distillate

Drawbar Performance

  • Observed Maximum Drawbar Horsepower: 15.25 HP
  • Calculated Maximum Drawbar Horsepower: 16.12 HP
  • Seventy-five percent of calculated maximum drawbar horsepower: 12.09 HP

Torque and Engine Performance

  • Engine Speed Rated: 1500 RPM
  • Type of Engine: 4-cylinder, vertical

Additional Specifications

  • Advertised Speeds (miles per hour):
  • First: 2.41
  • Second: 3.25
  • Third: 1.75
  • Fourth: 7.14
  • Reverse: 2.28
  • Total Time Motor Operated: 51 hours

Overall Efficiency

  • Eighty-five percent of calculated maximum belt horsepower: 16.16 HP



NTTL. (1939). Test 316: Allis-Chalmers Model RC (Distillate). Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/901

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