Overview
The Avery 25-50 is a farm tractor produced between 1916 and 1923 in Peoria, Illinois, featuring a 17.4L 4-cylinder liquid-cooled opposed horizontal kerosene engine. This 12,500-pound machine is equipped with a two-speed unsynchronized gear transmission and steel ag tires for both the front and rear.
Ideal Applications
Tested Performance Capabilities:
In Nebraska Tractor Test 43, the unit achieved a maximum drawbar pull of 3,225 lbs and a maximum belt power of 56.68 hp while consuming 7.0 gallons of kerosene per hour.
Engine and Fuel Configuration:
The engine is a 1061.9 ci horizontal design with a 6.50x8.00 inch bore/stroke and features a primary 50-gallon fuel tank supplemented by a 5-gallon auxiliary tank.
Physical Dimensions and Weight:
The tractor stands 108 inches high and 176 inches long, weighing 12,500 lbs and utilizing 69x20 inch steel rear wheels and 38x10 inch steel front wheels.
Production
| Description | Standard-tread tractor / Built in Peoria, Illinois, USA |
|---|---|
| Manufacturer | Avery |
| Original price | $2,350 |
Engine
| Aux. fuel | 5 gal (18.9 L) |
|---|---|
| Engine type | Avery 17.4L 4-cyl kerosene |
| Fuel tank | 50 gal (189.2 L) |
| Bore/Stroke | 6.50x8.00 inches (165 x 203 mm) |
| Coolant capacity | 220 qts (208.2 L) |
| Description | Avery / kerosene / 4-cylinder / liquid-cooled opposed horizontal |
| Displacement | 1061.9 ci (17.4 L) |
| Rated RPM | 700 |
| Belt (claimed) | 50 hp (37.3 kW) |
| Belt (tested) | 56.68 hp (42.3 kW) |
| Drawbar (claimed) | 25 hp (18.6 kW) |
| Drawbar (tested) | 32.62 hp (24.3 kW) |
Transmission
| Gears | 2 forward and 1 reverse |
|---|---|
| Transmission type | 2-speed unsynchronized gear |
| Type | unsynchronized gear |
Mechanical
| Drive type | Two-wheel drive |
|---|
Dimensions & Tires
| Ag front | 38x10 steel |
|---|---|
| Ag rear | 69x20 steel |
| Height | 108 inches (274 cm) |
| Length | 176 inches (447 cm) |
| Operating weight | 12,500 lbs (5670 kg) |
| Width | 90.5 inches (229 cm) |
| Front tire | 38x10 |
| Rear tire | 69x20 |
| Weight | 12,500 lbs (5670 kg) |
25-50 Serial Numbers
| Location: | frame |
|---|
Nebraska Tractor Test 43
| Belt fuel use (max) | 7.0 gal/hour (26.5 l/hour) |
|---|---|
| Belt power (max) | 56.68 hp (42.3 kW) |
| Description | Kerosene 2-speed 2WDJuly 26 - 30, 1920Link: Nebraska Tractor Test 43 file / Drawbar performance / Gear 2 used for power test. |
| Max power | 32.62 hp (24.3 kW) |
| Max pull | 3,225 lbs (1462 kg) |