TractorDex
TractorDexIndex
McCormick-DeeringUSACatalog archive

McCormick-Deering WD-6

Production years: 1940–1952

Compare with other modelsValue machine
Engine horsepower
40 HP
—
Displacement
4.1 L
4-cylinder engine
Drive and chassis
2WD
Gear (5F/1R)
Operating weight
1,973 kg
4,350 lbs

Sources and field evidence

Catalog Archive: Baseline specifications compiled from historical manufacturer archives and equipment registries. Laboratory test report verification in progress.

McCormick-Deering WD-6
VLM Verified Authentic
McCormick-Deering WD-6

Ask TractorDex AI Copilot About WD-6

Instant technical consultation powered by heavy machinery knowledge

Engineering & Capability Benchmark

Specific output, tractive ratio, and segment percentile

Compact / Sub-Compact Yard
Global Tractor Fleet Power SpectrumTop 84% of all indexed machinery
Compact (20 HP)Utility (100 HP)Row-Crop (250 HP)Titans (600+ HP)
Specific Output
9.8 HP/L
Aspiration: Unknown
Traction Ratio
49.3 kg/HP
Heavy ballast for draft pull
PTO Efficiency
—
Mechanical driveline
Hydraulic Flow
Standard
Auxiliary implement ports

Engine and power specifications

Engine model
International Harvester
Fuel type
Diesel
Rated horsepower
40 hp
Rated PTO Power
N/A (McCormick-Deering specification)
Drawbar Power @ Rated Engine Speed
31.02 hp (Nebraska OECD Test 2218)
Cylinders
4
Displacement
4.1 L (247.7 ci)
Bore / stroke
3.875x5.25 inches 98 x 133 mm
Rated RPM
1450 RPM
Crankcase oil capacity
N/A
Coolant capacity
27 qts (~25.5 L)

Maintenance picks for the WD-6

Filters, oil and common wear parts for this model.

Transmission and chassis specifications

Transmission type
Gear (5F/1R)
Gears (forward / reverse)
5 forward / 1 reverse
Drive system
2WD
Wheelbase
76 in
Front tire
22.50-4
Rear tire
42-10
Hydraulic flow
N/A
Rear hitch
N/A
ASABE EP496 Engineering Matcher

Implement Draft & Ballast Matcher

Simulate draft resistance, drawbar power transfer, and optimal axle weight distribution for McCormick-Deering WD-6.

Overloaded / Wheel Slip Alert(209%)
CAD DRAFT SCHEMATIC • Wide-Span Field Cultivator
SOIL: Medium Tilled LoamDEPTH: 4"SPEED: 7 MPH209% LOAD
SOIL SURFACE (0.0")SUB-SURFACE PLOW PAN (~14")40 HP◄ 3,129 LBS DRAFT4" DEPTH
DRAWBAR DEMAND: 58.4 HPWIDTH / SIZE: 18 ft Width
ASABE D497.7 Tillage Specific Resistance Formula
Implement Size (ft Width)18 ft Width
18 ft WidthDefault: 4270 ft Width
Tillage / Seeding Depth4 inches (10 cm)
2"Target: 4"6"
Target Operating Field Speed7.0 mph (11.3 km/h)
5 mphRated: 7 mph9 mph
Engine Power Demand vs Rated Output83.4 HP / 40 HP Rated
0%55% (Min Load)60-85% (Sweet Spot)100% (Cap)
Draft Force
3,129 lbs
Drawbar Power
58.4 HP
Target Slip
8% - 12%
Axle Ballast Balance (2WD Standard Utility )Calibrated for Wide-Span Field Cultivator (100 lbs/HP standard)
Target: 4,000 lbs
Front Axle: 28%Rear Axle: 72%
508 kg (1,120 lbs)1,306 kg (2,880 lbs)
Ballast Adjustment vs Base:-350 lbs (-159 kg)
Hourly Diesel Burn
1.9 gal/h
7.2 L/hr (est. $7/h)
Hydraulic Fan Status
Standard Draw
No fan req

Engine demand (83.4 HP) exceeds rated power (40 HP). Reduce working speed by 1.0-1.5 mph or reduce working width.

Catalog archival serial-number ranges

12 production years
Production yearStarting serial #Ending serial #Assembly plant
1940#516#1,224Factory not specified
1941#1,225#3,717Factory not specified
1942#3,718End of runFactory not specified
1944#6,371#9,508Factory not specified
1945#9,509#14,018Factory not specified
1946#14,019#16,810Factory not specified
1947#16,811#24,019Factory not specified
1948#24,020#28,905Factory not specified
1949#28,906#35,565Factory not specified
1950#35,566#39,442Factory not specified
1951#39,443#45,174Factory not specified
1952#45,175End of runFactory not specified

Instant Used Market Valuation Projector

Algorithmic resale estimate for McCormick-Deering WD-6 (1940)

Full Appraisal Tool
Operating Meter Hours3,200 hrs
Mechanical & Physical Condition
Empirical model calibrated against dealer & auction lots
Estimated Fair Market Value
$1,806
Basis: 40 HP • 86 yrs old
Auction / Wholesale
$1,481 – $1,662
Dealer Retail Asking
$1,896 – $2,131
3-Year Projected Resale Curve~5% annual retention decay
Year 2027
$1,716
Year 2028
$1,630
Year 2029
$1,548

Direct Segment Rivals & Showdowns

Head-to-head match-ups calibrated by horsepower and era

Caterpillar+6 HP
R3
46 HP
Fordson+5 HP
Major
45 HP
International Harvester+5 HP
T-9
45 HP

Looking for a used McCormick-Deering WD-6?

Browse live listings and auction results near you.

McCormick-Deering

USA • 42 Models

McCormick-Deering was a prominent brand in agricultural machinery during the early 20th century, closely associated with International Harvester. The brand's origins trace back to Cyrus McCormick, who revolutionized farming with the invention of the first successful mechanical reaper in 1831. This innovation laid the groundwork for what would eventually become International Harvester, a conglomerate formed from the merger of McCormick Harvesting Machine Company and other entities. In 1923, International Harvester introduced the McCormick-Deering brand to market its new line of standard (wide) front tractors, including the popular 10-20 and 15-30 models. These tractors were designed to meet the demands of American and international farmers, providing reliable and powerful machinery for a variety of agricultural tasks. The McCormick-Deering name adorned tractors and machinery for the next three decades, becoming synonymous with durability and innovation in the agricultural sector. However, by the mid-20th century, the brand was phased out as International Harvester consolidated its product lines under the International name. Today, McCormick-Deering is remembered as a significant chapter in the history of agricultural machinery, representing a period of rapid technological advancement and the transition to mechanized farming.

View Full McCormick-Deering Lineup