1940-1953

The O-4 was an orchard/vineyard tractor built narrower to fit more easily between rows of trees. It was based on the W-4 standard. It had a completely smooth hood by lowering the air intake and exhaust and optional headlights were mounted below the radiator. It had an International Harvester 2.5L four-cylinder 4×2 2WD gasoline engine with manual steering, five-speed gear transmission, and an open operator station. It was also available in the OS-4 orchard model without full sheet metal.

Engine: IH

Cylinders: 4

Bore & Stroke: 3.375x4.45

RPM: 1650

CID: 152

Fuel: Gasoline

Main Fuel Tank Cap: 17.5

Aux Fuel Tank Cap:

Carburetor: IHC D-10

Cooling Capacity: 4.5

Drawbar HP: 25

Belt PTO HP: 27.5

Weight: 4,320 lbs

Length: 120.9 inches

Width: 60.25 inches

Height: 60.25 inches

Number of Gears: 5/1

Options:

Total Produced: 2721

1940: 501

1941: 943

1942: 4056

1943: 5693

1944: 7593

1945: 11171

1946: 13934

1947: 16022

1948: 18880

1949: 21912

1950: 24470

1951: 28167

1952: 31214

1953: 33067-34176

1954: N.A.