Compare/McCormick-Deering O-4 vs McCormick-Deering WD-40

McCormick-Deering O-4 vs McCormick-Deering WD-40

Verdict: McCormick-Deering O-4 vs McCormick-Deering WD-40

The McCormick-Deering O-4 and the McCormick-Deering WD-40 are both tractors — here is how they stack up on the figures that matter. McCormick-Deering WD-40 leads on rated power with 28 hp against 24 hp. McCormick-Deering O-4 is the lighter machine (1,959 kg vs 3,424 kg), which helps on soft ground and transport, while the heavier model carries more ballast for traction-limited draft work. McCormick-Deering WD-40 holds more fuel (117.3 L vs 66.2 L) for longer stints between fills. McCormick-Deering O-4 is the newer design (1940 vs 1935). In short: choose the McCormick-Deering WD-40 for outright pulling power, or the McCormick-Deering O-4 if a tighter budget and lighter footprint matter more. Compare the full spec tables below before booking a demo.

Tune the fit score

Tell us about your operation

Acreage600 acBudgetMain crop / use

Fit & specs

McCormick-Deering

Fit score

Best match

Clear

McCormick-Deering

Fit score

Best match

Clear

Rated power

24 hp

28 hp

Confidence

40%

Guide price

—

Overview

Manufacturer

McCormick-DeeringReference

McCormick-Deering (a part of International Harvester)Reference

liquid-cooledReference

Gear 1 used for pull test.Reference

Total built

2,721Reference

—

Final drives

—

spur gearReference

Variants

W-4

standardReference

—

O-4

orchardReference

—

OS-4

orchard, without full sheet metalReference

—

WA-40

—

gasolineReference

WK-40

—

keroseneReference

WD-40

—

dieselReference

Engine

Fuel tank

66.2 LReference

117.3 LReference

Aux. fuel

2.8 LReference

4.7 LReference

Belt (claimed)

20.5 kWReference

32.8 kWReference

Displacement

2.5 LReference

7.6 LReference

Bore/Stroke

86 x 113 mmReference

121 x 165 mmReference

Compression

4.5:1 (kerosene)Reference

17:1Reference

Rated RPM

1650Reference

1100Reference

Firing order

1-3-4-2Reference

—

Oil capacity

5.7 LReference

—

Drawbar (claimed)

—

20.9 kWReference

Plows

—

4 (14-inch)Reference

Drawbar (tested)

—

27.7 kWReference

Belt (tested)

—

36.4 kWReference

Air cleaner

—

oil bathReference

Starter type

—

hand-cranked gasoline-ignitionReference

Coolant capacity

—

53.0 LReference

Belt power (max)

—

36.4 kWReference

Max power

—

27.7 kWReference

Transmission

Type

gearReference

Gears

5 forward and 1 reverseReference

3 forward and 1 reverseReference

Clutch

—

dry discReference

PTO & Hydraulics

Rear PTO Type

540Reference

—

Dimensions

Wheelbase

169 cmReference

—

Weight

1959 kgReference

3424 kgReference

Front tire

5.50-16Reference

34x6Reference

Rear tire

12-26Reference

50x12Reference

Ag front

5.50-16Reference

34x6 steelReference

Ag rear

12-26Reference

50x12 steelReference

Length

307 cmReference

359 cmReference

Height

153 cmReference

170 cmReference

Shipping weight

1959 kgReference

—

O-4 Serial Numbers

1940

OBH501Reference

—

1941

OBH943Reference

—

1942

OBH4056Reference

—

1943

OBH5693Reference

—

1944

OBH7593Reference

—

1945

OBH11171Reference

—

1946

OBH13934Reference

—

1947

OBH16022Reference

—

1948

OBH18880Reference

—

1949

OBH21912Reference

—

1950

OBH24470Reference

—

1951

OBH28167Reference

—

1952

OBH31214Reference

—

1953

OBH33067Reference

—

Location:

Left side of tractor, on clutch housing.Reference

—

Capacities

Diameter

24 cmReference

42 cmReference

Width

153 cmReference

166 cmReference

RPM

1019Reference

588Reference

Speed

792.78 meters/minReference

786.38 meters/minReference

Test results

Belt fuel use (max)

—

12.9 l/hourReference

Max pull

—

2165 kgReference

Fit score weighs budget, operation size, crop match and data confidence against the details above. It’s guidance, not advice — always confirm with a dealer demo.