Twin City 40-65

Last Updated: July 2024

Overview

The Twin City 40-65 is a classic standard-tread tractor known for its 4x2 2WD chassis configuration and single-speed transmission. This tractor is equipped with a large liquid-cooled, vertical L-head, 4-cylinder engine that runs on kerosene, with a displacement of 1486.2 cubic inches and a bore and stroke of 7.25 inches by 9.00 inches, respectively. The engine operates at a rated speed of 535 RPM and has a substantial coolant capacity of 520 quarts, ensuring efficient thermal regulation during operation. The heavy-duty steel tires measure 42 inches in diameter and 12 inches in width for the front, while the rear tires are notably large at 84 inches in diameter and 24 inches in width. With an overall length of 240 inches and height of 122 inches, the 40-65 weighs in at 25,550 lbs. The transmission provides a forward speed of 1.9 mph and a reverse speed of 1.9 mph. During independent testing, the tractor consumed 1.5 gallons of oil and required several repairs and adjustments, including fan bolt tightening, clutch adjustment, carburetor venturi change, and air valve change. However, the tractor was in good condition at the end of the test with no signs of undue wear.

Key Specifications

Category: Utility, Standard Tread

Transmission: Gear

Drive Type: 2WD

Operating Weight: 25,550

Fuel Type: Kerosene

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Twin City 40-65 Tractor

Twin City 40-65 vs. Similar Tractors

Operating Weight

Poor

Greater than 6% of similar tractors.

Technical Specifications

Engine

Manufacturer: Twin City
Model: -
Cooling Type: Liquid-cooled
Cylinder Orientation: Vertical
Valve Configuration: L-head
Fuel Type: Kerosene
Induction Type: Natural
Cylinders: 4
Displacement (ci): 1486.2
Bore (in): 7.25
Stroke (in): 9
Rated RPM: 535
Power Output (hp): -

Transmission

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

Dimensions

Length (in): 240
Width (in): -
Height (in): 122
Operating Weight (lb): 25,550

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: -
Coolant Capacity (qts): 520
Front Tire Diameter (in): 42
Front Tire Width (in): 12
Rear Tire Diameter (in): 84
Rear Tire Width (in): 24
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: August 5, 1920

Maximum Power and Fuel Consumption

Maximum Brake Horsepower (Rated Load Test): 65.96 HP using kerosene fuel
Fuel Consumption at Rated Load: 5.97 Gallons per hour

Drawbar Performance

Maximum Drawbar Horsepower (Rated Load Test): 36.12 HP at 2.00 mph with 19.6% slip using kerosene fuel
Fuel Consumption During Drawbar Test: 7.16 HP.hr/gal

Engine and Oil Consumption

Engine Oil Consumption: 15 quarts of oil used during the entire test
Transmission Lubricant Consumption: 11 gallons of 600 W cylinder oil and 12 lbs of hard “cup” grease

General Specifications

Motor: 4-cylinder, L-head, Bore 7¾ inches, Stroke 9 inches, Rated speed 535 r.p.m.
Chassis: 4-wheel, 2 clutches of contracting band type. Rated speed forward: 1.9 miles per hour, reverse: 1.9 miles per hour.
Total Weight: 25,550 lbs

Additional Notes

Various maintenance tasks were performed during testing, including tightening the clutch and adjusting the carburetor.

Nebraska Tractor Test Lab. (1920). Test 048: Twin City 40-65. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/665