Rhoderman - I seem to be the "disagreer" today but I am speaking from experience. There are two set screws but only one has a noticable point. IH installed a larger set screw in the hole first and this is the pointed one. The point is designed to wedge behind the back corner of the bearing housing forcing the bearing forward (or pto backwards) against the lock ring inside the pto pulley. The second set screw is about 1/2 the length of the first and is there to lock the first one. It doesn't have the pronounced point, just a semi-flat point. I also use a very small amount of blue locktite on both set screws. Having said that, I have found different after market set screws and also set screws in the wrong order. I also put a small amount of grease on my finger and run it around the outside of the bearing before slipping the pto on. I mean a very small amount. I do this for ease of future removal. It slows down that fine rust that causes forum talk.
I like your advice about chasing threads. I have made a set of "thread chasers" from grade eight bolts by cutting and filing the threads and use them all of the time. Of course taps are probably the best but my bolts are easy to start then I finish off with a good blast of air.
I guess I'm a stickler for detail but one wrong bit of advice can really cause headaches so I simply try and back up and stick to what IH did in the first place. After all, their way has been proven with time.
Good luck to all....Wayne
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