1937 - 1952

Oliver 90 tractors were built in the 1937-53 period. This tractor was essentially the same as the Oliver Hart-Parr 3-5 Plow tractor introduced in 1930 and tested at Nebraska under NO. 183. In fact, the same test number was used for the 28-44 and the Oliver 90. Rated at 1,125 rpm the four-cylinder engine carried a 4 3/4 x 6 1/4 inch bore and stroke. By 1948 the Oliver 90 was retailing at $1,983 on steel or $2,347 on rubber tires. Equipped with pneumatic tires, it weighed 6,141 pounds.

Engine: Oliver-Waukesha I-Head

Cylinders: 4

Bore & Stroke: 4.75x6.25

RPM: 1125

CID: 443

Fuel: Kerosene

Main Fuel Tank Cap: 30

Aux Fuel Tank Cap:

Carburetor: Marvel-Schebler

Cooling Capacity: 5.25

Drawbar HP: 21.93

Belt PTO HP: 28.4

Weight: 5797 lbs

Length: inches

Width: inches

Height: inches

Number of Gears: 4/1

Options:

Total Produced: 9295

1937: 508918

1938: 508935

1939: 509612

1940: 610068

1941: 510564

1942: 510977

1943: 511474

1944: 511474

1945: 512044

1946: 512821

1947: 513106

1948: 513856

1949: 514856

1950: 516276

1951: 516888

1952: 517874-518212

Location: Metal plate on the right of the rear engine block