Allis Chalmers G

Last Updated: July 2024

Overview

The Allis Chalmers G is a classic tool carrier tractor with a 4x2 chassis, manual steering, and a Continental AN-62 gasoline engine with an octane rating of 74. It features a liquid-cooled, 4-cylinder engine with 62 cubic inches of displacement, an L-head valve configuration, and a rated RPM of 1950. The tractor has a gear transmission with 3 forward and 1 reverse gear. Key specifications include a total operating weight of 1749 lbs, a drawbar height of 12.5 inches, 24-inch front tires, and 30-inch rear tires. Additional details cover the front and rear wheel types, battery, electrical system, carburetor, governor, air cleaner, and oil filter. This model was manufactured from 1948 to 1955 and is known for its practicality, maneuverability, and vintage appeal.

Key Specifications

Category: Tool Carrier

Transmission: Gear

Drive Type: 2WD

Operating Weight: 1749

Fuel Type: Gasoline with Octane 74

Allis Chalmers G vs. Similar Tractors

Operating Weight

Poor

Greater than 5% of similar tractors.

Technical Specifications

Engine

Manufacturer: Continental
Model: AN-62
Cooling Type: Liquid-cooled
Cylinder Orientation: Vertical
Valve Configuration: L-head
Fuel Type: Gasoline with Octane 74
Induction Type: Natural aspirated
Cylinders: 4
Displacement (ci): 62
Bore (in): 2.375
Stroke (in): 3.5
Rated RPM: 1950
Power Output (hp): -

Transmission

Type: Gear
Forward Gears: 3
Reverse Gears: 1
Total Gears: -

Dimensions

Length (in): 116
Width (in): -
Height (in): 55.7
Operating Weight (lb): 1749

Power Take-Off (PTO)

PTO Type: -
PTO Speed 1 (rpm): -
PTO Speed 2 (rpm): -
PTO Speed 3 (rpm): -

Miscellaneous

Chassis: 4x2
Drive Type: 2WD
Steering Type: Manual
Coolant Capacity (qts): 6.5
Front Tire Diameter (in): 24
Front Tire Width (in): 4
Rear Tire Diameter (in): 30
Rear Tire Width (in): -
Front/Rear Rim Diameter (in): -
Tire Type: Ag
Manufacture - End Year: 1955
Hitch Type: -
Hitch Category: -
Hitch Position: -
Hitch Capacity (lb): -
Operator Station Type: Open
Starter Type: Electric
Brake Type: Bendix Internal Expanding
Hydraulic System Type: -

Test Results

Nebraska Tractor Test Laboratory - Test Date: July 16 to July 30, 1948

Maximum Power and Fuel Consumption

Maximum Observed Horsepower: 10.07 HP at 1802 rpm
Fuel Consumption at Maximum Power: 1.112 Gal/hr with a fuel efficiency of 9.06 HP.hr/gal

Drawbar Performance

Horsepower at 2nd Gear Maximum Load: 6.66 HP at 1260 rpm with a drawbar pull of 516 lbs and a speed of 3.41 mph
Fuel Consumption at Drawbar Maximum Load: 2.057 Gal/hr with a fuel efficiency of 6.66 HP.hr/gal

Weight and Dimensions

Total Weight with Operator: 1749 lbs
Height of Drawbar: 12.5 inches
Rear Tires: 26-3.00, 2-ply

Engine Specifications

Engine Model: Continental
Bore and Stroke: 2 3/8 in x 3 1/2 in
Rated RPM: 1950 rpm
Starter: Delco-Remy

Performance at Different Loads

75% Load (Observed): 9.37 HP at 1806 rpm
Varying Load 2-Hour Average: 5.96 HP at 1803 rpm with a fuel consumption of 1.261 Gal/hr and a fuel efficiency of 8.17 HP.hr/gal

NTTL.(1948). Nebraska OECD Tractor test 398 for Allis-Chalmers Model G. Lincoln, NE: Nebraska Tractor Test Laboratory. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/971