1922-1927

The Wallis “OK” of 1922 represented a constant improvement in the line. In Nebraska Test No. 92, this 4,000 pound tractor exerted a maximum drawbar pull of 2,590 pounds. Its four cylinder 4 1/4 x 5 3/4 inch engine showed a maximum of 18 drawbar and 28 brake horsepower running at 1,000 RPM. This was 100 revs faster than the earlier Model K. The Bennett carburetor gave some problems, particularly at idle speeds. No doubt the fuel vaporizer had a troublesome effect.

Engine: Case Vertical

Cylinders: 4

Bore & Stroke: 4.25x5.75

RPM: 1000

CID: 326.3

Fuel: Gasoline

Main Fuel Tank Cap: 20

Aux Fuel Tank Cap:

Carburetor: Bennett WS

Cooling Capacity: 5.25

Drawbar HP: 15

Belt PTO HP: 27

Weight: 3630 lbs

Length: inches

Width: inches

Height: inches

Number of Gears: 2/1

Options: