Farmall A Plow
Finding specific parts for older tractors is not always as easy as we would all like it to be. But thanks to the internet we are now able to locate and purchase these parts with far greater ease no matter what we are looking for, whether it is a plow for a Farmall A or a Camshaft for the H model.
The American farming landscape changed dramatically in the years from 1850 to 1950 due mostly to the introduction of farm tractors. Early tractors used steam engines and then the internal combustion engine was introduced in the twentieth century. The early steam engine tractor was primitive looking and gigantic and used chains on a rotating shaft to control steering.
Not long after tractors were introduced, farmers quickly found that engine driven tractors were more economical to use than keeping animals to till the land, so tractors began selling across the land. Many times agricultural machinery dealers would receive cattle as partial payment for tractors and they would in turn sell the cattle in the meat market. The Farmall is one of early tractors and the most familiar and famous names in tractor history. Tractors were made to be work horses, so niceties were minimal. This included foregoing a fuel gauge.
In the farm business tractors are necessary for cultivating crops, so tractors have been a must for farm owners. Tractors are also used in excavation, in manufacturing and industry, or on construction sites. The number of tractors needed on a farm and the selection of an optimum equipment set Is driven by farm size, availability of labor and custom services, crop selection, and cultural practices, such as the choice of tillage system. Even though the demand for tractor power typically increases with farm size, there are many commercial farms that still operate efficiently with only one tractor.
Tractors are designed to operate at different travel speeds, but the final drives are not designed for all possible torques theoretically available. The engine may range from about 12 to 120 horsepower or more and tractors over the years have been typically offered in the range of 20 to 400 horsepower. Engine power is transmitted to a gearbox typically having 4 to10 speeds (these transmissions are manually switched via a control lever to determine how fast the tractor can go) and through the differential gear to the two large rear-drive wheels. Some farm tractors can reach speeds up to 25 miles per hour, but slow speeds are necessary to give the farmer more control while doing field work.
Additional weight and ballast can be added to farm tractors for help in reducing wheel slip when pulling heavy loads. Insufficient ballast can cause increased fuel consumption and excessive wheel slip. Also, tractors use large tires to avoid compressing the earth and digging in. Only the rear tires really need to be large and unless the tractor has four wheel drive the front tires can be small and smooth. Tractors used on ground with irregular contours have front axels so mounted that their left and right front ends rise and fall independently of each other. However, soil contour can induce tractor and machine vibrations, which can reduce driver’s comfort and his capability in controlling the linked machinery.
Tractors are mostly used to pull, but in some cases, push objects. They are designed to use slow speeds to pull large loads or higher speeds with lighter loads. Speeds in the field may get up to 10 mph, but 2 to 5 mph is more typical for rangeland applications. Tractors are generally are two-wheel drive or two-wheel drive with front wheel assist, but some may use four-wheel drive (often with articulated steering). There are also tracked tractors (with either two or four powered rubber tracks).
In order to prevent rollover the hitching point for tractors is below the rear axles. Some people, in an attempt to get more weight / traction, have unfortunately attached to a point above the rear axle of the drive wheels but this can lead to disaster. When a tractor is used to free and tow a stuck vehicle, the vehicles should be hitched front-to-front with a chain using the towing tractor in reverse. This method transmits all the engine power of the towing tractor through the chain to the towed vehicle thus minimizing the risk for rollover.
A drawbar or three-point hitch is used to attach most farm implements to the rear of the tractor. The three-point hitch which allows the operator to lift the implement being towed and which transfers the weight and stress of an implement to the rear wheels of the tractor, has been standard since the 1960’s and was invented by Harry Ferguson in 1926.
By: Cowboy Bob Hill
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