Minneapolis 39-57 Specs ( 1928-1929 )
Overview
The Minneapolis 39-57 is a standard-tread farm tractor produced between 1928 and 1929 in Hopkins, Minnesota. It features a Stearns 10.1L 4-cylinder gasoline engine and an open operator station equipped with manual steering.
Ideal Applications
Tested Power Output:
Nebraska Tractor Test 163 recorded a maximum belt power of 64.55 hp and a maximum drawbar pull of 5950 lbs.
Engine and Mechanical Configuration:
The liquid-cooled engine operates at a rated 1000 RPM and is paired with a gear transmission providing 2 forward and 1 reverse speeds.
Physical Dimensions and Equipment:
The unit weighs 9695 lbs and is equipped with 58x19.5 steel rear tires and a 20-inch diameter belt pulley rated at 620 RPM.
Production
| Description | Standard-tread tractor / Built in Hopkins, Minnesota, USA |
|---|---|
| Manufacturer | Minneapolis (a part of Minneapolis Threshing Machine Company) |
Engine
| Engine type | Stearns 10.1L 4-cyl gasoline |
|---|---|
| Bore/Stroke | 5.50x6.50 inches (140 x 165 mm) |
| Description | Stearns / gasoline / 4-cylinder / liquid-cooled |
| Displacement | 617.7 ci (10.1 L) |
| Rated RPM | 1000 |
| Starter type | hand crank |
| Belt (claimed) | 57 hp (42.5 kW) |
| Belt (tested) | 64.55 hp (48.1 kW) |
| Drawbar (claimed) | 39 hp (29.1 kW) |
| Drawbar (tested) | 47.77 hp (35.6 kW) |
Transmission
| Gears | 2 forward and 1 reverse |
|---|---|
| Transmission type | 2-speed gear |
| Type | gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
Dimensions & Tires
| Weight | 9695 lbs (4397 kg) |
|---|---|
| Rear tire | 58x19.5 |
| Weight | 9695 lbs (4397 kg) |
| Ag rear | 58x19.5 (steel) |
Belt Pulley
| Diameter | 20 inches (50 cm) |
|---|---|
| RPM | 620 |
| Width | 8.5 inches (21 cm) |
Nebraska Tractor Test 163
| Belt fuel use (max) | 6.4 gal/hour (24.2 l/hour) |
|---|---|
| Belt power (max) | 64.55 hp (48.1 kW) |
| Description | June 5 - 14, 1929Link: Nebraska Tractor Test 163 file / Drawbar performance |
| Max power | 47.77 hp (35.6 kW) |
| Max pull | 5950 lbs (2698 kg) |