Here is a picture of one of the bottom pivot bearings. Was pitted from water damage so thought I would move it to the top, then I saw the crack. Will maybe last a while if the crack is placed away from the angular force.
The number on the bearing was 928, can't remember the make

. I looked it up in a bearing crossreference book and found a Massey Ferguson number 900928. Has anyone tried the tractor suppliers or collectors. I will look around and let you know what I find.
Phil