froggy
Veteran Member
- Joined
- Jul 14, 2001
- Messages
- 1,075
- Location
- Cooke County, Texas
- Tractor
- JD4320 with TNT, electric diverter, cruise control and air suspension seat.
More tidbits from the web:
3 Point Hitch
Category 0
For Tractors up to 17 Horsepower
Top Link Pins are 5/8 inch in Diameter
Lift Arm Pins are 5/8 inch in Diameter
Category 1
For Tractors with 18 to 45 Horsepower
Top Link Pins are 3/4 inch in Diameter
Lift Arm Pins are 7/8 inch in Diameter
Category 2
For Tractors with 46-95 Horsepower
Top Link Pins are 1 inch in Diameter
Lift Arm Pins are 1 and 1/8 inch in Diameter
Category 3
For Tractors with 95 Horsepower and Up
Top Link Pins are 1 and 1/4 inch in Diameter
Lift Arm Pins are 1 and 7/16 inch in Diameter
The Category I three -point hitch is based on three mounting points for the implement. The lift arms are the 2 steel or cast arms that extend rearward and provide the lift and are the pull-point for the implement. The top link is the third mounting point and extends from a top middle position out the rear of the tractor. Comparatively very little rearward force is applied from the top link unless the implement becomes bound up or twisted in some way. The standards require that the pin sizes on the implement and corresponding lift-arm holes be 7/8" (.88-.89). The top link uses a 3/4" (.76-.77) pin and hole. The distance from the tail of the PTO shaft to the lift arm ends is approximately 14 inches. The minimum spread between the lower lift arms will be about 26-27 inches, the maximum spread is normally out to 33 inches or more.
3 Point Hitch
Category 0
For Tractors up to 17 Horsepower
Top Link Pins are 5/8 inch in Diameter
Lift Arm Pins are 5/8 inch in Diameter
Category 1
For Tractors with 18 to 45 Horsepower
Top Link Pins are 3/4 inch in Diameter
Lift Arm Pins are 7/8 inch in Diameter
Category 2
For Tractors with 46-95 Horsepower
Top Link Pins are 1 inch in Diameter
Lift Arm Pins are 1 and 1/8 inch in Diameter
Category 3
For Tractors with 95 Horsepower and Up
Top Link Pins are 1 and 1/4 inch in Diameter
Lift Arm Pins are 1 and 7/16 inch in Diameter
The Category I three -point hitch is based on three mounting points for the implement. The lift arms are the 2 steel or cast arms that extend rearward and provide the lift and are the pull-point for the implement. The top link is the third mounting point and extends from a top middle position out the rear of the tractor. Comparatively very little rearward force is applied from the top link unless the implement becomes bound up or twisted in some way. The standards require that the pin sizes on the implement and corresponding lift-arm holes be 7/8" (.88-.89). The top link uses a 3/4" (.76-.77) pin and hole. The distance from the tail of the PTO shaft to the lift arm ends is approximately 14 inches. The minimum spread between the lower lift arms will be about 26-27 inches, the maximum spread is normally out to 33 inches or more.
