i AM GOING THROUGH SOMETHING SIMILAR ON MY McCormick MC 120(CaseIh maxum) I finally got mine narrowed down to the pulley being wore out on the alternator. So belts were slipping on alt pulley which screwed up the "hertz" being produced. It seams that regulates the tach which also controls the electronic pto switch and the electronic forward, back shuttle. It's been a nightmare for the last 2 years. So first thing to note is tach reading correct all the time? Mine would not register on start up but then if I revved engine and backed it off to idle then tach would kick in. But then as engine would warm up evidently belts would stretch and start slipping. Then belts would get glazed and slip all the time which led to the pulleys wearing and slip all the time. I am no expert but would note if your tach is acting right and go from there.
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Today's Featured Article - What Oil Should I Use? - by Francis Robinson. I keep seein this question pop up over and over again in discussion groups all over the web. As with many things there are often several right answers and a few wrong ones. Some purist I'm sure will disagree to no end with what I will tell you but most of us out here in the real world don't really care do we ? Some of them only bring their noses down out of the air long enough to look down them anyway. If you are like me you are only doing this old tractor stuff because you enjoy it. You
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