Agriculture Reference
In-Depth Information
top link
or
center link,
dictates the angle of the implement to the ground and serves as a
pivot point to raise the implement. When the implement is raised, the added weight on the
tractor's rear wheels increases traction.
Most modern compact tractors have either a Category 1 or 2 three-point hitch (see chart).
Some Category 1 implements can be adapted to Category 2 hitches, but Category 2 imple-
ments cannot fit a Category 1 hitch. (
Category
refers to the size of the connecting pins and
the strength of the components.)
Appearance
Don't be overly influenced by a shiny appearance, as fresh paint can often cover up signi-
ficant problems. Ninety percent of all tractors are stored outdoors. This means that many
tractors that are functionally sound may look weather-beaten, with oxidized paint and
tattered seat covers. One item of appearance that you should be concerned with is weather-
checked tires.
Three-point-hitch classifications
CATEGORY 0
Tractors with up to 20 hp
Top-link pins are ⅝ inch in diameter
Lift-arm pins are ⅝ inch in diameter
Width of arm spread is 19 inches when implement is centered
CATEGORY 1
Tractors with 20-45 hp
Top-link pins are ¾ inch in diameter
Lift-arm pins are ⅞ inch in diameter
Width of arm spread is 26 inches when implement is centered
CATEGORY 2
Tractors with 55-90 hp
Top-link pins are 1 inch in diameter
Lift-arm pins are 1 ⅛ inches in diameter
Width of arm spread is 32 inches when implement is centered
CATEGORY 3
Tractors with 95-100+ hp
