Apparently this has never been done before, and there are no manuals, no mention of changing these leaky parts of a PTO even in the myriad of threads on PTOs on Stovebolt (just one such question many years ago that went unanswered). So, here I go, I'm out looking for O rings and some O ring removing tools, and I am going to just try it from the outside first. Obviously if I screw it up I will have to remove the PTO and bench it to fix what I screwed up. But first --- what happens when you remove the six screws that hold it on and pull the PTO loose? does stuff fall out that I don't (yet) know how to fit back in, or does it for some reason just come off nicely without stuff falling out? I'm not somebody who has ever done this before but I know somebody must have, O rings just wear out. BTW, here'a a pic of this old truck that I am trying to help.
