THREE-POINT HITCH AND LINKAGE PARTS
Three-point hitch and linkage parts are used in the attachment of three-point hitch implements to the rear of agricultural wheeled tractors. Components are available for most Category 0, 1, 2 and 3 hitches. Tractor hitches are classified by the drawbar horsepower of the tractor as shown in the table below.
| HITCH CATEGORY | MAXIMUM DRAWBAR HORSEPOWER | TOP LINK PIN DIAMETER | LIFT ARM PIN DIAMETER |
| Category 0 | Up to 20 Horsepower | 5/8" | 5/8" |
| Category 1 | 20 Horsepower to 45 Horsepower | 3/4" | 7/8" |
| Category 2 | 40 Horsepower to 100 Horsepower | 1" | 1-1/8" |
| Category 3 | 80 Horsepower to 225 Horsepower | 1-1/4" | 1-7/16" |