I've always wondered.....what is different about an O-H engine vs getting a new tractor with a new engine? Should it also be broke in with various techniques? Or just use it.
I remember when we bought our 1206 new. 1965. IH store/mechanic/IH service bulleting recommended letting it run overnight at about 1500 rpms & then they would come reset the valves the next day. We did that.
Does anyone do that now? | 
Breaking in tractor engine after overhaul?