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Minneapolis 39-57

Minneapolis 39-57 tractor
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The Minneapolis 39-57 is a standard-tread tractor produced from 1928 to 1929 by Minneapolis, a part of Minneapolis Threshing Machine Company. It was built in Hopkins, Minnesota, USA. The tractor is powered by a Stearns 10.1L 4-cylinder liquid-cooled gasoline engine with a hand crank starter, rated at 63.3 hp estimated engine power. It features a 2-speed gear transmission with 2 forward and 1 reverse gears. The tractor delivers 39 hp drawbar power claimed and 57 hp belt power claimed, with tested drawbar power of 47.77 hp and belt power of 64.55 hp. It has two-wheel drive, manual steering, and an open operator station. The tractor weighs 9695 lbs (4397 kg) and uses 58x19.5 steel rear tires. The belt pulley diameter is 20 inches with a width of 8.5 inches and runs at 620 RPM.
Minneapolis 39-57tractorspecificationsenginetransmissionpowerdimensionsMinneapolis Threshing Machine Company
Power63 hp[B]
Founded1928 - 1929
Model39-57

Technical Specifications

Detailed specifications and technical data for Minneapolis 39-57

Power

Belt (tested):64.55 hp (48.1 kW)
Belt (claimed):57 hp (42.5 kW)
Drawbar (tested):47.77 hp (35.6 kW)
Drawbar (claimed):39 hp (29.1 kW)

Engine

Make:Stearns
Type:gasoline
Cooling:liquid-cooled
Cylinders:4-cylinder
Rated RPM:1000
Bore/Stroke:5.50x6.50 inches (140 x 165 mm)
Displacement:617.7 ci (10.1 L)
Starter type:hand crank

Overview

Type:Standard-tread tractor
Built in:Hopkins, Minnesota, USA
Production years:1928 - 1929
Estimated engine power:63.3 hp

Mechanical

Drive:Two-wheel drive
Steering:Manual steering
Operator station:Open operator station

Belt Pulley

RPM:620
Width:8.5 inches (21 cm)
Diameter:20 inches (50 cm)

Transmission

Type:gear
Gears:2 forward and 1 reverse

Dimensions & Tires

Weight:9695 lbs (4397 kg)
Rear tire:58x19.5 (steel)