Be advised that the ball and pin on the front end of 3 point hitch lower link that attach to tractor are different than the ball and pin on the rear of the lower link that attach to the implement. The front pin attaches to the draft sensing crank arms. This pin is 1 inch diameter. There is a bushing used inside the ball so the ball fits snugly on the pin. I have replaced this bushing before and to the best of my knowledge and memory , this bushing is not a metal material but a resin plastic material. The pin has a grease fitting on the end of it and is bored inside so grease is injected between the bushing and the pin for lubrication. I worked on a tractor once that someone had replaced the original front ball with a standard cat II lower link ball. (Cat II balls fit 1-1/8" pins.) It had play between the 1" pin and ball. I acquired the bushing from IH to install in this ball but it would not fit. The hole through the front ball is larger diameter than a standard Cat II ball. I will remove the pin from one of my tractors and drop the hitch link down so I can measure the front ball for dimensions and will post my findings tomorrow.
I think that if you replace your front ball with a standard Cat II ball , you will be disappointed in the fit.
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