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...