the spacer on the inside of the 2 bearings? it should be snug between the 2 bearings not loose if its loose the bearings aren't pressed into the housing all the way in. or its worn. there's probably not a torque spec because its a castle nut with a cotter pin and at that torque spec the pin slot and holes may not line up. i usually give a few uggaduggas till the slots line up. you dont wanna give more than say 4 tho cuz thats too tight lmao