|
Three-point linkage categories are
standardized based on tractor power and
hitch pin sizes, ranging from Category 0 to
4. These categories help ensure
compatibility between tractors and
implements. The pin diameter of the top link
is a key differentiator between categories.
Here's a more detailed breakdown:
|
Cat. |
Typical tractor power |
Top link pin diameter |
Lift
arm pin diameter |
Lower hitch spacing |
|
0 |
Up to
20 hp (15 kW) |
5⁄8 in
(16 mm) |
5⁄8 in
(16 mm) |
20 in
(510 mm) |
|
1 |
20 to 45 hp (15 to 34 kW) |
3⁄4 in
(19 mm) |
7⁄8 in
(22 mm) |
28 in
(710 mm) |
|
2 |
40 to
100 hp (30 to 75 kW) |
1 in
(25 mm) |
1 1⁄8 in (29 mm) |
34 in
(860 mm) |
|
3 |
80 to
225 hp (60 to 168 kW) |
1 1⁄4 in (32 mm) |
1 7⁄16 in (37 mm) |
40 in
(1,020 mm) |
|
4 |
More
than 180 hp (134 kW) |
1 3⁄4 in (44 mm) |
2 in
(51 mm) |
48 in
(1,220 mm) |
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to learn more about the three point linkage. |