Overview
The Twin City 21-32 is a standard-tread farm tractor produced in Minneapolis, Minnesota, from 1928 to 1938, with a total production of 7,229 units. It features a 6.3L 4-cylinder liquid-cooled kerosene engine and was available with either 2-speed or 3-speed gear transmission options. The machine is configured with an open operator station, manual steering, and steel wheels, weighing approximately 5,880 lbs.
Ideal Applications
Tested Power and Pull Performance:
In Nebraska Tractor Test 127, the tractor achieved a maximum drawbar pull of 5,092.5 lbs and a maximum belt power of 35.9 hp while operating on kerosene.
Engine and Fuel Configuration:
The 381.7 ci engine utilizes a dual-tank system consisting of a 30-gallon main fuel tank and a 4-gallon auxiliary tank, reaching a rated speed of 1075 RPM.
Belt Pulley and Chassis Dimensions:
Equipped with an 84-inch wheelbase and 50x12 steel rear wheels, the tractor includes a 16-inch diameter belt pulley that operates at 650 RPM with a 7.5-inch width.
Production
| Description | Standard-tread tractor / Built in Minneapolis, Minnesota, USA |
|---|---|
| Manufacturer | Twin City |
| Total built | 7,229 |
Engine
| Aux. fuel | 4 gal (15.1 L) |
|---|---|
| Engine type | Twin City 6.3L 4-cyl kerosene |
| Fuel tank | 30 gal (113.6 L) |
| Bore/Stroke | 4.50x6.00 inches (114 x 152 mm) |
| Coolant capacity | 36 qts (34.1 L) |
| Description | Twin City / kerosene / 4-cylinder / liquid-cooled inline |
| Displacement | 381.7 ci (6.3 L) |
| Rated RPM | 1075 |
| Belt (claimed) | 32 hp (23.9 kW) |
| Belt (tested) | 39.1 hp (29.2 kW) |
| Drawbar (claimed) | 21 hp (15.7 kW) |
| Drawbar (tested) | 31.05 hp (23.2 kW) |
Transmission
| Clutch | dry disc |
|---|---|
| Gears | 2 forward and 1 reverse / 3 forward and 1 reverse |
| Type | gear / gear |
| Transmission type | 2-speed gear / 3-speed gear |
| Transmission type | 2-speed gear / 3-speed gear |
Mechanical
| Cab | Open operator station. |
|---|---|
| Description | Manual steering |
| Drive type | Two-wheel drive |
Dimensions & Tires
| Height | 66 inches (167 cm) |
|---|---|
| Length | 137 inches (347 cm) |
| Weight | 5880 lbs (2667 kg) |
| Wheelbase | 84 inches (213 cm) |
| Front tire | 34x5.75 |
| Rear tire | 50x12 |
| Weight | 5880 lbs (2667 kg) |
| Wheelbase | 84 inches (213 cm) |
| Ag front | 34x5.75 (steel) |
| Ag rear | 50x12 (steel) |
21-32 Serial Number Location
| Description | Serial number plate on the left side of the tractor, ahead of the transmission. |
|---|
Belt Pulley
| Diameter | 16 inches (40 cm) |
|---|---|
| RPM | 650 |
| Width | 7.5 inches (19 cm) |
Nebraska Tractor Test 127
| Belt fuel use (max) | 4.3 gal/hour (16.3 l/hour) |
|---|---|
| Belt power (max) | 35.9 hp (26.8 kW) |
| Description | Kerosene 2-speed 2WDOctober 7 - 13, 1926Link: Nebraska Tractor Test 127 file / Drawbar performance |
| Max power | 31.05 hp (23.2 kW) |
| Max pull | 5092.5 lbs (2309 kg) |
Nebraska Tractor Test 152
| Belt fuel use (max) | 4.0 gal/hour (15.1 l/hour) |
|---|---|
| Belt power (max) | 39.1 hp (29.2 kW) |
| Description | Gasoline 3-speed 2WDOctober 1 - 8, 1928Link: Nebraska Tractor Test 152 file / Drawbar performance |
| Max power | 30.2 hp (22.5 kW) |
| Max pull | 4716.5 lbs (2139 kg) |
References
| Description | General Catalog No. 31 published in 1930, by Minneapolis-Moline |
|---|
Tractor Tests
| Description | NTTL 127: kerosene 2-speed 2WD / NTTL 152: gasoline 3-speed 2WD |
|---|