Minneapolis 39-57

Last Updated: July 2024

Overview

The Minneapolis 39-57 is a standard-tread tractor, recognized for its robust and straightforward design. It was developed during an era where simplicity and durability were key for agricultural machinery. This model features a manual steering system and a 3-speed gear transmission with 1 reverse gear. The engine, a 4-cylinder liquid-cooled unit manufactured by Stearns, has a sizeable displacement of 617.7 cubic inches, meant to deliver reliable power. Its rated RPM is 1000, and it operates using gasoline with a natural aspiration system. The tractor's significant weight of 9695 pounds testifies to its built quality and capability for heavy tasks. In Nebraska Tractor Tests, it demonstrated a maximum power of 57.39 HP at 999 RPM with a fuel consumption of 8.90 gallons per hour. The drawbar performance showed 39.84 HP with a pull of 3723 lbs at 4.01 miles per hour in a 10-hour test.
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Key Specifications

Category: Utility, Standard Tread

Transmission: Gear

Drive Type: 2WD

Operating Weight: 9695

Fuel Type: Gasoline

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Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor Minneapolis 39-57 Tractor

Minneapolis 39-57 vs. Similar Tractors

Operating Weight
Average
Greater than 62% of similar tractors.

Technical Specifications

Engine

Manufacturer
Stearns
Model
-
Cooling Type
Liquid-cooled
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
Gasoline
Induction Type
Naturally aspirated
Cylinders
4
Displacement (ci)
617.7
Bore (in)
5.5
Stroke (in)
6.5
Rated RPM
1000
Power Output (hp)
-

Transmission

Type
Gear
Forward Gears
3
Reverse Gears
1
Total Gears
-

Dimensions

Length (in)
-
Width (in)
-
Height (in)
-
Operating Weight (lb)
9695

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
Manual
Coolant Capacity (qts)
-
Front Tire Diameter (in)
-
Front Tire Width (in)
-
Rear Tire Diameter (in)
-
Rear Tire Width (in)
19.5
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
Hand crank
Brake Type
-
Hydraulic System Type
-

Test Results

Nebraska Tractor Test Laboratory - Test Date: June 5 to 14, 1929

Maximum Power and Fuel Consumption

  • Rated Load Test (One Hour): 57.39 HP at 999 RPM
  • Fuel Consumption at Rated Load: 8.90 gallons per hour with a fuel efficiency of 0.692 lb/hp.hr

Drawbar Performance

  • Rated Load Test (Ten Hours, High Gear): 39.84 HP with a drawbar pull of 3723 lbs at a speed of 4.01 miles per hour
  • Fuel Consumption at Rated Load: 4.03 gallons per hour with a fuel efficiency of 5.678 lb./hp.hr
  • Maximum Load Test: 28.78 HP with a pull of 5950 lbs and speed of 3.01 miles per hour

Engine Specifications

  • Engine Type: 4-Cylinder, vertical
  • Bore and Stroke: 5-1/2 x 6-1/2 inches
  • Rated Engine Speed: 1000 RPM
  • Carburetor: Stromberg Model
  • Lubrication: Pressure

Additional Notes

  • Specific adjustments during the test included tightening the fan belt and locking the gearshift lever in place with a block of wood due to gears slipping out of mesh.

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