David-Brown

4600 (1968-1972)

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Tractor Info

1968-1972

The three-cylinder gasoline-powered engine of this model offered a 164.4 CID which resulted from a 3.939 x 4.500 inch bore and stroke. Rated speed was 2,200 rpm. At this speed, 46.05 maximum PTO horsepower was observed, as was an economy of 11.53 horsepower hours per gallon of gasoline. Operating at 540 PTO rpm and a corresponding engine speed of 1,828 rpm, an economy of
11.75 horsepower hours per gallon was manifested against a load of 40.59 PTO horsepower. No repairs or adjustments were required during 47 hours of operating time. Features included a selective gear fixed-ratio transmission with six forward speeds ranging from
2.38 to 16.3 mph. Tire equipment included 14.9-28 rear and 6.00-16 inch front rubber. The bare tractor weight of 4,430 pounds was raised to a total test weight of 6,750 pounds through the addition of front and rear ballast. Using third gear, this unit emerged from the two-hour economy run with a reading of 38.34 maximum available horsepower and a resultant fuel economy of 9.67 horsepower hours per gallon of gasoline. Also recorded was a pull of 2,833 pounds at 5.08 mph and slippage of 6.51%. The ten-hour run at 75% pull balanced an economy figure of 9.62 horsepower hours per gallon against a load of 32.1 horsepower. Other statistics include a pull of 2,228 pounds at 5.4 mph and slippage of 4.92%.


Tractor Info

Engine: David Brown

Cylinders: 3

Bore & Stroke: 3.939x4.500

RPM: 2200

CID: 164.4

Fuel: Gasoline

Main Fuel Tank Cap:

Aux Fuel Tank Cap:

Carburetor:

Cooling Capacity: 11 qts

Drawbar HP:

Belt PTO HP:

Weight: 3980 lbs

Length: 121.5 inches

Width: 68.375 inches

Height: 54 (hood) inches

Number of Gears: 6/2

Options:


1968: 900001

1969: 900312

1970: 900422

1971: 900501

1972: 900689



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