type "b' 3pt arms? wrong size hole

[PIPELAGGER]

i bought my MF 135 wiht a 200loader and 52-212 backhoe. the gut threw in the arms ..no center one, but when i went to hook up AFTER(uggggh) remving backhoe, i fine that the pins n my tractor are 7/8'diameter and the swivelball that would apper to go corrrectly to it 1-1/8'. the other end is 7/8 but seems wrong or aqward to swing it to there. I cant bushing it up becuase the cotterpin holes are for the smaller ball. this guy probably never used the arms so the question is where i was suppoese to have them the aqward way or if thses are the wrong arms to tractor. it seemed to me the implement i was going to use would have needed the 7/8 ball also. that was a 4' rototiller i was renting. this will be quite a journey and probaly more expense than worth it to find correct arms at a salvage yard If that is the problem. I did see that there are differnt size pegs, but i think those are like wheel studs and are pounded in not threaded