McCormick-Deering W-6

Last Updated: July 2024

Overview

The McCormick-Deering W-6 is a utility tractor equipped with a 4.1L 4-cylinder gasoline engine rated at 1450 rpm. Independent test results show a maximum belt horsepower of 36.85 HP and a drawbar power of 25.36 HP at rated engine speed. The tractor has a 5-speed forward and 1-speed reverse sliding gear transmission. It has a coolant capacity of 25 quarts and operates on 73 octane gasoline. The standard tire configuration uses 6.00-16 tires on the front (22 psi) and 13-30 tires on the rear (12 psi). The operating weight as tested was 7,610 lbs with additional weights of 770 lbs per rear wheel and 270 lbs per front wheel. Additional features include a Rockford foot-operated clutch, a 12.5" diameter belt pulley, and a Bishop and Babcock thermostat for cooling medium temperature control.
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Key Specifications

Category: Utility

Transmission: Sliding Gear

Operating Weight: 7610

Fuel Type: Gasoline (73 octane)

McCormick-Deering W-6 vs. Similar Tractors

Operating Weight
Average
Greater than 37% of similar tractors.

Technical Specifications

Engine

Manufacturer
International Harvester
Model
4.1L 4-cyl
Cooling Type
-
Cylinder Orientation
-
Valve Configuration
-
Fuel Type
Gasoline (73 octane)
Induction Type
Naturally Aspirated
Cylinders
4
Displacement (ci)
247.7
Bore (in)
3.875
Stroke (in)
5.25
Rated RPM
1450
Power Output (hp)
-

Transmission

Type
Sliding Gear
Forward Gears
5
Reverse Gears
1
Total Gears
-

Dimensions

Length (in)
124.4
Width (in)
69.75
Height (in)
70.125
Operating Weight (lb)
7610

Power Take-Off (PTO)

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

Miscellaneous

Chassis
-
Drive Type
-
Steering Type
-
Coolant Capacity (qts)
25
Front Tire Diameter (in)
-
Front Tire Width (in)
6
Rear Tire Diameter (in)
-
Rear Tire Width (in)
13
Front/Rear Rim Diameter (in)
-
Tire Type
Ag
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: September 11 to 27, 1940

Maximum Power and Fuel Consumption

  • Maximum Power (Belt Horsepower, Test B): 36.85 HP at 1449 rpm
  • Fuel Consumption at Maximum Power (Test B): 2.496 Gal/hr with a fuel efficiency of 0.690 lb/HP.hr
  • Fuel Consumption at Operating Maximum Load (Test C): 2.495 Gal/hr with a fuel efficiency of 0.690 lb/HP.hr

Drawbar Performance

  • Drawbar Power at Rated Engine Speed (8th Gear, Test F): 25.36 HP with a drawbar pull of 3495 lbs and a speed of 1.95 mph
  • Fuel Consumption at Rated Speed (Test F): 2.951 Gal/hr with a fuel efficiency of 0.898 lb/HP.hr

Engine Performance

  • Operating Maximum Load (Test C): 36.15 HP at 1449 rpm
  • Variable Load, 20 minutes runs (Test E): Average 0.523 lb/HP.hr

Hydraulic Performance

  • Not Provided

Overall Efficiency

  • Fuel Efficiency at Belt Pulley Speed: 11.0 HP.hr/gal at 898 rpm



Nebraska Tractor Test Lab. (1940). Test 355: McCormick-Deering Model W-6 (Gasoline). Lincoln, NE: University of Nebraska-Lincoln. Retrieved from https://digitalcommons.unl.edu/tractormuseumlit/943

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