The distance from the lower pin to the top link pins of this hitch is 12 inches.Ī Category 0 3-point hitch can work with popular tractor brands like John Deere, Bolens, Cub Cadet, Case, and so on. Source: Category 0Ĭategory 0 3-point hitches are light-duty, and they fit with agricultural implements of 20-inch wide. They differ in the attached tractor’s power, top link pin diameter, lift arm pin diameter, and lower hitch spacing.
In general, 3-point hitches are grouped into 5 size categories from Category 0 to Category 4. This hitch has a top link pin diameter of 1¼ inches and a lift arm pin diameter of 1-7/16 inches General Dimensions & Categories For example, a Category 3 hitch is used with a tractor of 80-225HP. The connecting hole size depends on the category of the 3-point hitch. You can also quickly remove or attach different implements on the tractor, depending on your work requirements. You can connect the 3-point hitch with the implements by mating the holes with the implement pins. The connecting holes are placed at the end of the lift arms and the top links. You can adjust the length of the top link as level or tilted, depending on your demands.
Top link: Keep the attached implement raise and lower in the same vertical plane. 2 lift arms: The tractor’s hydraulic system controls the up and down movement of these lift arms and the attached implement movement. It consists of 2 lift arms and a top link with the operational concepts as below: Hitch categoryĪ 3 point hitch receiver is constantly attached to the rear of a tractor. A hitch in the higher category has more powerful lift arms and larger connector pins. The tractor’s hitch size (or category) depends on the tractor’s drawback horsepower. These components appear in most Category 0, 1, 2, 3 hitches. The below diagram illustrates how these parts of a 3-point hitch are connected. 3-point Hitch Parts DiagramĪ 3-point hitch is made of the 4 following parts to attach a wheeled tractor to an implement: Source: Īfter the success of the 3-point hitch on the Ford 9N-Series, other manufacturers started producing their 3-point hitches.īy 1960, the specifications of the 3-point hitch became standardized in the agricultural industry by the American Society of Agricultural Engineers (ASAE 217) and then the International Association for Standardizations (ISO 730-1). In 1938, Ferguson made a production agreement with Ford Corporation to apply the first 3-point hitch in the Ford model 9N tractors in 1939, which became a big success for Ford afterward. The first 3-point hitch was invented by Harry Ferguson in 1936. It helps farmers yield, lower human labor costs, and boost the tractor’s functionality. The invention of 3-point hitches opens a new era in agricultural life. You can transfer that implements weight and resistance to the tractor’s drive wheels using this connector. The implement is raised slightly to get through tough spots so the operator does not have to shift to a lower gear.An Overview Of 3 Point Hitches For TractorsĪ 3-point hitch (or 3-point linkage) is a simple connector between a tractor and an implement (or an attachment) in agricultural machinery. The implement will raise and lower to follow the ground contours while maintaining a nearly constant depth.ī) Operating in varying soil conditions. Use draft load sensing when one of the following conditions apply:Ī) Operating with a fully-mounted implement in uneven terrain. 
Draft sensing is with the lower draft links that provide the input to the draft sensing control shaft.
The variable draft control system includes draft sensing springs (as shown in the photo above) which react as soil conditions change and 3-point hitch load varies. The rockshaft draft control knob allows the operator to set the required work depth on implements mounted to the 3-point hitch to either follow the ground contour or automatically raise the hitch to get through tough spots in the field. The stop knob for the position control lever is used to preset depth. The position control lever is used to raise/lower the hitch. The hitch works as follows (see illustrations above for referencing): The operator selects the rear hitch load setting by adjusting the draft sense control knob, and depending on field conditions, it can be changed on-the-go.Ĭonveniently-located hitch control console makes it easy to operate the hitch. The draft sense utilizes right-hand draft link to instantaneously sensor the load information coming from the implement and delivers it to the hitch control mechanism for fast, smooth, and accurate hitch corrections. Draft sense is mechanically-controlled and is base equipment. #3 point hitch draft control series#
The 6D Series Tractor rockshaft is equipped with variable draft control system. Hitch, mechanical lower link draft sensing
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