Avery 14-28

Last Updated: July 2024

Overview

The Avery 14-28 tractor, a standard-tread utility model, features a 2WD chassis and manual steering system. Its 4-cylinder, liquid-cooled, horizontal engine runs on kerosene and is naturally aspirated with a displacement of 470.4 ci (4.625x7 in bore/stroke). The rated engine speed ranges from 700 to 900 RPM. The gear transmission provides 2 forward gears (low: 2-1/3 mph, high: 3 mph) and 1 reverse gear. Independent testing revealed a maximum belt horsepower of 28.68 HP at 1040 RPM, with fuel consumption rates of 2.505 gal/hr at rated load and 2.652 gal/hr at maximum load. The drawbar power at rated load was 17.68 HP, with a maximum of 21.15 HP. The tractor's operating weight is 7540 lbs, with steel tires (36x6 in front, 60x16 in rear) and dimensions of 152x68x104 inches.

Key Specifications

Category: Utility, Standard Tread

Transmission: Gear

Drive Type: 2WD

Operating Weight: 7540

Fuel Type: Kerosene

Avery 14-28 vs. Similar Tractors

Operating Weight

Average

Greater than 55% of similar tractors.

Technical Specifications

Engine

Manufacturer: Avery
Model: -
Cooling Type: Liquid-cooled
Cylinder Orientation: Horizontal
Valve Configuration: -
Fuel Type: Kerosene
Induction Type: Naturally Aspirated
Cylinders: 4
Displacement (ci): 470.4
Bore (in): 4.625
Stroke (in): 7
Rated RPM: 700 - 900
Power Output (hp): -

Transmission

Type: Gear
Forward Gears: 2
Reverse Gears: 1
Total Gears: -

Dimensions

Length (in): 152
Width (in): 68
Height (in): 104
Operating Weight (lb): 7540

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): 120
Front Tire Diameter (in): 36
Front Tire Width (in): 6
Rear Tire Diameter (in): 60
Rear Tire Width (in): 16
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: -
Brake Type: -
Hydraulic System Type: -

Test Results

Nebraska Tractor Test Laboratory - Test Date: July 23 to August 2, 1920

Maximum Power and Fuel Consumption

Maximum Belt Horsepower: 28.68 HP at 1040 RPM
Fuel Consumption at Rated Load: 2.505 gal/hr with kerosene weighing 6.75 lbs/gal
Fuel Consumption at Maximum Load: 2.652 gal/hr

Drawbar Performance

Drawbar Power at Rated Load: 17.68 HP at 2.505 gal/hr fuel rate
Maximum Drawbar Load: 21.15 HP with a pull of 2847 lbs at 1.74 mph and a slip of 18.3%

Torque and Engine Performance

Engine Speed at Maximum Power: 1040 RPM
Torque (Calculated from HP and RPM): Maximum torque can be calculated using the formula ( \text{Torque (lb-ft)} = \frac{5252 \times \text{HP}}{\text{RPM}} )

Hydraulic Performance

Not applicable: The report does not include hydraulic performance metrics for the tractor.

Overall Efficiency

Fuel Efficiency at Rated Load: Evaluated through long duration load tests, underscoring the tractor's capability on kerosene with consistent performance metrics.

Nebraska Tractor Test Lab. (1920). Test 042: Avery 14-28. University of Nebraska-Lincoln. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/659